From 86cf9a0f73ecd204a8b6783c9a2557a640619b2d Mon Sep 17 00:00:00 2001
From: Willem Jan Palenstijn <WillemJan.Palenstijn@uantwerpen.be>
Date: Wed, 16 Apr 2014 11:12:40 +0000
Subject: Remove code duplication in templated projectors
---
include/astra/FanFlatBeamLineKernelProjector2D.h | 7 +
include/astra/FanFlatBeamLineKernelProjector2D.inl | 494 +---------------
include/astra/FanFlatBeamStripKernelProjector2D.h | 6 +
.../astra/FanFlatBeamStripKernelProjector2D.inl | 643 +--------------------
include/astra/ParallelBeamLineKernelProjector2D.h | 7 +
.../astra/ParallelBeamLineKernelProjector2D.inl | 490 +---------------
.../astra/ParallelBeamLinearKernelProjector2D.h | 9 +
.../astra/ParallelBeamLinearKernelProjector2D.inl | 280 +--------
include/astra/ParallelBeamStripKernelProjector2D.h | 7 +
.../astra/ParallelBeamStripKernelProjector2D.inl | 489 +---------------
10 files changed, 158 insertions(+), 2274 deletions(-)
(limited to 'include/astra')
diff --git a/include/astra/FanFlatBeamLineKernelProjector2D.h b/include/astra/FanFlatBeamLineKernelProjector2D.h
index 154504a..8ead007 100644
--- a/include/astra/FanFlatBeamLineKernelProjector2D.h
+++ b/include/astra/FanFlatBeamLineKernelProjector2D.h
@@ -178,6 +178,13 @@ public:
float32 angleBetweenVectors(float32 _fAX, float32 _fAY, float32 _fBX, float32 _fBY);
+protected:
+ /** Internal policy-based projection of a range of angles and range.
+ * (_i*From is inclusive, _i*To exclusive) */
+ template <typename Policy>
+ void projectBlock_internal(int _iProjFrom, int _iProjTo,
+ int _iDetFrom, int _iDetTo, Policy& _policy);
+
};
//----------------------------------------------------------------------------------------
diff --git a/include/astra/FanFlatBeamLineKernelProjector2D.inl b/include/astra/FanFlatBeamLineKernelProjector2D.inl
index e686532..7ea2749 100644
--- a/include/astra/FanFlatBeamLineKernelProjector2D.inl
+++ b/include/astra/FanFlatBeamLineKernelProjector2D.inl
@@ -29,10 +29,31 @@ $Id$
using namespace astra;
-//----------------------------------------------------------------------------------------
-// PROJECT ALL
template <typename Policy>
void CFanFlatBeamLineKernelProjector2D::project(Policy& p)
+{
+ projectBlock_internal(0, m_pProjectionGeometry->getProjectionAngleCount(),
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CFanFlatBeamLineKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CFanFlatBeamLineKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ _iDetector, _iDetector + 1, p);
+}
+
+//----------------------------------------------------------------------------------------
+// PROJECT BLOCK
+template <typename Policy>
+void CFanFlatBeamLineKernelProjector2D::projectBlock_internal(int _iProjFrom, int _iProjTo, int _iDetFrom, int _iDetTo, Policy& p)
{
// variables
float32 sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, S, T, t, I, P, x, x2;
@@ -47,7 +68,7 @@ void CFanFlatBeamLineKernelProjector2D::project(Policy& p)
const SFanProjection * proj = 0;
// loop angles
- for (iAngle = 0; iAngle < m_pProjectionGeometry->getProjectionAngleCount(); ++iAngle) {
+ for (iAngle = _iProjFrom; iAngle < _iProjTo; ++iAngle) {
// get theta
if (pProjectionGeometry) {
@@ -69,7 +90,7 @@ void CFanFlatBeamLineKernelProjector2D::project(Policy& p)
}
// loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
+ for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) {
iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector;
@@ -273,468 +294,3 @@ void CFanFlatBeamLineKernelProjector2D::project(Policy& p)
} // end loop detector
} // end loop angles
}
-
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE PROJECTION
-template <typename Policy>
-void CFanFlatBeamLineKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
-{
- // variables
- float32 sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, S, T, t, I, P, x, x2;
- float32 lengthPerRow, updatePerRow, inv_pixelLengthX, lengthPerCol, updatePerCol, inv_pixelLengthY;
- int iVolumeIndex, iRayIndex, row, col, iDetector, x1;
- bool switch_t;
-
- const CFanFlatProjectionGeometry2D* pProjectionGeometry = dynamic_cast<CFanFlatProjectionGeometry2D*>(m_pProjectionGeometry);
- const CFanFlatVecProjectionGeometry2D* pVecProjectionGeometry = dynamic_cast<CFanFlatVecProjectionGeometry2D*>(m_pProjectionGeometry);
-
- float32 old_theta, theta, alpha;
- const SFanProjection * proj = 0;
-
- //get theta
- if (pProjectionGeometry) {
- old_theta = pProjectionGeometry->getProjectionAngle(_iProjection);
- }
- else if (pVecProjectionGeometry) {
- proj = &pVecProjectionGeometry->getProjectionVectors()[_iProjection];
- old_theta = atan2(-proj->fSrcX, proj->fSrcY);
- if (old_theta < 0) old_theta += 2*PI;
- } else {
- assert(false);
- }
-
- switch_t = false;
- if (old_theta >= 7*PIdiv4) old_theta -= 2*PI;
- if (old_theta >= 3*PIdiv4) {
- old_theta -= PI;
- switch_t = true;
- }
-
- // loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) continue;
-
- if (pProjectionGeometry) {
- t = -pProjectionGeometry->indexToDetectorOffset(iDetector);
- alpha = atan(t / pProjectionGeometry->getSourceDetectorDistance());
- t = sin(alpha) * pProjectionGeometry->getOriginSourceDistance();
- }
- else if (pVecProjectionGeometry) {
- float32 detX = proj->fDetSX + proj->fDetUX*(0.5f + iDetector);
- float32 detY = proj->fDetSY + proj->fDetUY*(0.5f + iDetector);
- alpha = angleBetweenVectors(-proj->fSrcX, -proj->fSrcY, detX - proj->fSrcX, detY - proj->fSrcY);
- t = sin(alpha) * sqrt(proj->fSrcX*proj->fSrcX + proj->fSrcY*proj->fSrcY);
- } else {
- assert(false);
- }
-
- if (switch_t) t = -t;
- theta = old_theta + alpha;
-
- // precalculate sin, cos, 1/cos
- sin_theta = sin(theta);
- cos_theta = cos(theta);
- inv_sin_theta = 1.0f / sin_theta;
- inv_cos_theta = 1.0f / cos_theta;
-
- // precalculate kernel limits
- lengthPerRow = m_pVolumeGeometry->getPixelLengthY() * inv_cos_theta;
- updatePerRow = sin_theta * inv_cos_theta;
- inv_pixelLengthX = 1.0f / m_pVolumeGeometry->getPixelLengthX();
-
- // precalculate kernel limits
- lengthPerCol = m_pVolumeGeometry->getPixelLengthX() * inv_sin_theta;
- updatePerCol = cos_theta * inv_sin_theta;
- inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY();
-
- // precalculate S and T
- S = 0.5f - 0.5f * ((updatePerRow < 0) ? -updatePerRow : updatePerRow);
- T = 0.5f - 0.5f * ((updatePerCol < 0) ? -updatePerCol : updatePerCol);
-
- // vertically
- if (old_theta <= PIdiv4) {
-
- // calculate x for row 0
- P = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta;
- x = (P - m_pVolumeGeometry->getWindowMinX()) * inv_pixelLengthX;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get coords
- x1 = int((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerRow;
-
- if (x1 < -1 || x1 > m_pVolumeGeometry->getGridColCount()) continue;
-
- // left
- if (x2 < 0.5f-S) {
- I = (0.5f - S + x2) / (1.0f - 2.0f*S) * lengthPerRow;
-
- if (x1-1 >= 0 /*&& x1-1 < m_pVolumeGeometry->getGridColCount()*/) {//x1 is always less than or equal to gridColCount because of the "continue" in the beginning of the for-loop
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1-1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // center
- else if (x2 <= 0.5f+S) {
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // right
- else if (x2 <= 1.0f) {
- I = (1.5f - S - x2) / (1.0f - 2.0f*S) * lengthPerRow;
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (/*x1+1 >= 0 &&*/ x1+1 < m_pVolumeGeometry->getGridColCount()) {//x1 is always greater than or equal to -1 because of the "continue" in the beginning of the for-loop
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1+1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
- }
-
- // horizontally
- else {
-
- // calculate point P
- P = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta;
- x = (m_pVolumeGeometry->getWindowMaxY() - P) * inv_pixelLengthY;
-
- // for each col
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get coords
- x1 = int((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerCol;
-
- if (x1 < -1 || x1 > m_pVolumeGeometry->getGridRowCount()) continue;
-
- // up
- if (x2 < 0.5f-T) {
- I = (0.5f - T + x2) / (1.0f - 2.0f*T) * lengthPerCol;
-
- if (x1-1 >= 0 /*&& x1-1 < m_pVolumeGeometry->getGridRowCount()*/) {//x1 is always less than or equal to gridRowCount because of the "continue" in the beginning of the for-loop
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1-1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // center
- else if (x2 <= 0.5f+T) {
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // down
- else if (x2 <= 1.0f) {
- I = (1.5f - T - x2) / (1.0f - 2.0f*T) * lengthPerCol;
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (/*x1+1 >= 0 &&*/ x1+1 < m_pVolumeGeometry->getGridRowCount()) {//x1 is always greater than or equal to -1 because of the "continue" in the beginning of the for-loop
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1+1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
- } // end loop col
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end loop detector
-
-}
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE RAY
-template <typename Policy>
-void CFanFlatBeamLineKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
-{
- // variables
- float32 sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, S, T, t, I, P, x, x2;
- float32 lengthPerRow, updatePerRow, inv_pixelLengthX, lengthPerCol, updatePerCol, inv_pixelLengthY;
- int iVolumeIndex, iRayIndex, row, col, x1;
- bool switch_t;
-
- const CFanFlatProjectionGeometry2D* pProjectionGeometry = dynamic_cast<CFanFlatProjectionGeometry2D*>(m_pProjectionGeometry);
- const CFanFlatVecProjectionGeometry2D* pVecProjectionGeometry = dynamic_cast<CFanFlatVecProjectionGeometry2D*>(m_pProjectionGeometry);
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + _iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) return;
-
- float32 old_theta, theta, alpha;
- if (pProjectionGeometry) {
- old_theta = pProjectionGeometry->getProjectionAngle(_iProjection);
- t = -pProjectionGeometry->indexToDetectorOffset(_iDetector);
- alpha = atan(t / pProjectionGeometry->getSourceDetectorDistance());
- t = sin(alpha) * pProjectionGeometry->getOriginSourceDistance();
- }
- else if (pVecProjectionGeometry) {
- const SFanProjection * proj = &pVecProjectionGeometry->getProjectionVectors()[_iProjection];
- old_theta = atan2(-proj->fSrcX, proj->fSrcY);
- if (old_theta < 0) old_theta += 2*PI;
-
- float32 detX = proj->fDetSX + proj->fDetUX*(0.5f + _iDetector);
- float32 detY = proj->fDetSY + proj->fDetUY*(0.5f + _iDetector);
- alpha = angleBetweenVectors(-proj->fSrcX, -proj->fSrcY, detX - proj->fSrcX, detY - proj->fSrcY);
- t = sin(alpha) * sqrt(proj->fSrcX*proj->fSrcX + proj->fSrcY*proj->fSrcY);
- } else {
- assert(false);
- }
-
- switch_t = false;
- if (old_theta >= 7*PIdiv4) old_theta -= 2*PI;
- if (old_theta >= 3*PIdiv4) {
- old_theta -= PI;
- switch_t = true;
- }
- if (switch_t) t = -t;
- theta = old_theta + alpha;
-
- // precalculate sin, cos, 1/cos
- sin_theta = sin(theta);
- cos_theta = cos(theta);
- inv_sin_theta = 1.0f / sin_theta;
- inv_cos_theta = 1.0f / cos_theta;
-
- // precalculate kernel limits
- lengthPerRow = m_pVolumeGeometry->getPixelLengthY() * inv_cos_theta;
- updatePerRow = sin_theta * inv_cos_theta;
- inv_pixelLengthX = 1.0f / m_pVolumeGeometry->getPixelLengthX();
-
- // precalculate kernel limits
- lengthPerCol = m_pVolumeGeometry->getPixelLengthX() * inv_sin_theta;
- updatePerCol = cos_theta * inv_sin_theta;
- inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY();
-
- // precalculate S and T
- S = 0.5f - 0.5f * ((updatePerRow < 0) ? -updatePerRow : updatePerRow);
- T = 0.5f - 0.5f * ((updatePerCol < 0) ? -updatePerCol : updatePerCol);
-
- // vertically
- if (old_theta <= PIdiv4) {
-
- // calculate x for row 0
- P = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta;
- x = (P - m_pVolumeGeometry->getWindowMinX()) * inv_pixelLengthX;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get coords
- x1 = int((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerRow;
-
- if (x1 < -1 || x1 > m_pVolumeGeometry->getGridColCount()) continue;
-
- // left
- if (x2 < 0.5f-S) {
- I = (0.5f - S + x2) / (1.0f - 2.0f*S) * lengthPerRow;
-
- if (x1-1 >= 0 /*&& x1-1 < m_pVolumeGeometry->getGridColCount()*/) {//x1 is always less than or equal to gridColCount because of the "continue" in the beginning of the for-loop
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1-1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // center
- else if (x2 <= 0.5f+S) {
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // right
- else if (x2 <= 1.0f) {
- I = (1.5f - S - x2) / (1.0f - 2.0f*S) * lengthPerRow;
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (/*x1+1 >= 0 &&*/ x1+1 < m_pVolumeGeometry->getGridColCount()) {//x1 is always greater than or equal to -1 because of the "continue" in the beginning of the for-loop
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1+1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
- }
-
- // horizontally
- else {
-
- // calculate point P
- P = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta;
- x = (m_pVolumeGeometry->getWindowMaxY() - P) * inv_pixelLengthY;
-
- // for each col
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get coords
- x1 = int((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerCol;
-
- if (x1 < -1 || x1 > m_pVolumeGeometry->getGridRowCount()) continue;
-
- // up
- if (x2 < 0.5f-T) {
- I = (0.5f - T + x2) / (1.0f - 2.0f*T) * lengthPerCol;
-
- if (x1-1 >= 0 /*&& x1-1 < m_pVolumeGeometry->getGridRowCount()*/) {//x1 is always less than or equal to gridRowCount because of the "continue" in the beginning of the for-loop
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1-1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // center
- else if (x2 <= 0.5f+T) {
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // down
- else if (x2 <= 1.0f) {
- I = (1.5f - T - x2) / (1.0f - 2.0f*T) * lengthPerCol;
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (/*x1+1 >= 0 &&*/ x1+1 < m_pVolumeGeometry->getGridRowCount()) {//x1 is always greater than or equal to -1 because of the "continue" in the beginning of the for-loop
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1+1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
- } // end loop col
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-}
diff --git a/include/astra/FanFlatBeamStripKernelProjector2D.h b/include/astra/FanFlatBeamStripKernelProjector2D.h
index 7fed4c8..6b95427 100644
--- a/include/astra/FanFlatBeamStripKernelProjector2D.h
+++ b/include/astra/FanFlatBeamStripKernelProjector2D.h
@@ -174,6 +174,12 @@ public:
*/
virtual std::string getType();
+protected:
+ /** Internal policy-based projection of a range of angles and range.
+ * (_i*From is inclusive, _i*To exclusive) */
+ template <typename Policy>
+ void projectBlock_internal(int _iProjFrom, int _iProjTo,
+ int _iDetFrom, int _iDetTo, Policy& _policy);
};
//----------------------------------------------------------------------------------------
diff --git a/include/astra/FanFlatBeamStripKernelProjector2D.inl b/include/astra/FanFlatBeamStripKernelProjector2D.inl
index e3f8b29..f95a065 100644
--- a/include/astra/FanFlatBeamStripKernelProjector2D.inl
+++ b/include/astra/FanFlatBeamStripKernelProjector2D.inl
@@ -29,10 +29,31 @@ $Id$
using namespace astra;
-//----------------------------------------------------------------------------------------
-// PROJECT ALL
template <typename Policy>
void CFanFlatBeamStripKernelProjector2D::project(Policy& p)
+{
+ projectBlock_internal(0, m_pProjectionGeometry->getProjectionAngleCount(),
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CFanFlatBeamStripKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CFanFlatBeamStripKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ _iDetector, _iDetector + 1, p);
+}
+
+//----------------------------------------------------------------------------------------
+// PROJECT BLOCK
+template <typename Policy>
+void CFanFlatBeamStripKernelProjector2D::projectBlock_internal(int _iProjFrom, int _iProjTo, int _iDetFrom, int _iDetTo, Policy& p)
{
ASTRA_ASSERT(m_bIsInitialized);
@@ -65,7 +86,7 @@ void CFanFlatBeamStripKernelProjector2D::project(Policy& p)
}
// loop angles
- for (iAngle = 0; iAngle < m_pProjectionGeometry->getProjectionAngleCount(); ++iAngle) {
+ for (iAngle = _iProjFrom; iAngle < _iProjTo; ++iAngle) {
// get values
theta = m_pProjectionGeometry->getProjectionAngle(iAngle);
@@ -84,7 +105,7 @@ void CFanFlatBeamStripKernelProjector2D::project(Policy& p)
if (theta < PIdiv4) {
// loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
+ for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) {
iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector;
@@ -345,617 +366,3 @@ void CFanFlatBeamStripKernelProjector2D::project(Policy& p)
delete[] sin_alpha;
}
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE PROJECTION
-template <typename Policy>
-void CFanFlatBeamStripKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
-{
- ASTRA_ASSERT(m_bIsInitialized);
-
- // Some variables
- float32 theta;
- int row, col;
- int iDetector;
- float32 res;
- int x1L, x1R;
- float32 x2L, x2R;
- int iVolumeIndex, iRayIndex;
-
- CFanFlatProjectionGeometry2D* projgeom = static_cast<CFanFlatProjectionGeometry2D*>(m_pProjectionGeometry);
-
- // Other precalculations
- float32 PW = m_pVolumeGeometry->getPixelLengthX();
- float32 PH = m_pVolumeGeometry->getPixelLengthY();
- float32 DW = m_pProjectionGeometry->getDetectorWidth();
- float32 inv_PW = 1.0f / PW;
- float32 inv_PH = 1.0f / PH;
-
- // calculate alpha's
- float32 alpha;
- float32* cos_alpha = new float32[m_pProjectionGeometry->getDetectorCount() + 1];
- float32* sin_alpha = new float32[m_pProjectionGeometry->getDetectorCount() + 1];
- for (int i = 0; i < m_pProjectionGeometry->getDetectorCount() + 1; ++i) {
- alpha = -atan((i - m_pProjectionGeometry->getDetectorCount()*0.5f) * DW / projgeom->getSourceDetectorDistance());
- cos_alpha[i] = cos(alpha);
- sin_alpha[i] = sin(alpha);
- }
-
-
- // get values
- theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- bool switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // Precalculate sin, cos, 1/cos
- float32 sin_theta = sin(theta);
- float32 cos_theta = cos(theta);
-
- // [-45?,45?] and [135?,225?]
- if (theta < PIdiv4) {
-
- // loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) continue;
-
- float32 sin_theta_left, cos_theta_left;
- float32 sin_theta_right, cos_theta_right;
-
- // get theta_l = alpha_left + theta and theta_r = alpha_right + theta
- float32 t_l, t_r;
- if (!switch_t) {
- sin_theta_left = sin_theta * cos_alpha[iDetector+1] + cos_theta * sin_alpha[iDetector+1];
- sin_theta_right = sin_theta * cos_alpha[iDetector] + cos_theta * sin_alpha[iDetector];
-
- cos_theta_left = cos_theta * cos_alpha[iDetector+1] - sin_theta * sin_alpha[iDetector+1];
- cos_theta_right = cos_theta * cos_alpha[iDetector] - sin_theta * sin_alpha[iDetector];
-
- t_l = sin_alpha[iDetector+1] * projgeom->getOriginSourceDistance();
- t_r = sin_alpha[iDetector] * projgeom->getOriginSourceDistance();
-
- } else {
- sin_theta_left = sin_theta * cos_alpha[iDetector] + cos_theta * sin_alpha[iDetector];
- sin_theta_right = sin_theta * cos_alpha[iDetector+1] + cos_theta * sin_alpha[iDetector+1];
-
- cos_theta_left = cos_theta * cos_alpha[iDetector] - sin_theta * sin_alpha[iDetector];
- cos_theta_right = cos_theta * cos_alpha[iDetector+1] - sin_theta * sin_alpha[iDetector+1];
-
- t_l = -sin_alpha[iDetector] * projgeom->getOriginSourceDistance();
- t_r = -sin_alpha[iDetector+1] * projgeom->getOriginSourceDistance();
- }
-
- float32 inv_cos_theta_left = 1.0f / cos_theta_left;
- float32 inv_cos_theta_right = 1.0f / cos_theta_right;
-
- float32 updateX_left = sin_theta_left * inv_cos_theta_left;
- float32 updateX_right = sin_theta_right * inv_cos_theta_right;
-
- // Precalculate kernel limits
- float32 S_l = -0.5f * updateX_left;
- if (S_l > 0) {S_l = -S_l;}
- float32 T_l = -S_l;
- float32 U_l = 1.0f + S_l;
- float32 V_l = 1.0f - S_l;
- float32 inv_4T_l = 0.25f / T_l;
-
- float32 S_r = -0.5f * updateX_right;
- if (S_r > 0) {S_r = -S_r;}
- float32 T_r = -S_r;
- float32 U_r = 1.0f + S_r;
- float32 V_r = 1.0f - S_r;
- float32 inv_4T_r = 0.25f / T_r;
-
- // calculate strip extremes (volume coordinates)
- float32 PL = (t_l - sin_theta_left * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta_left;
- float32 PR = (t_r - sin_theta_right * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta_right;
- float32 PLimitL = PL + S_l * PH;
- float32 PLimitR = PR - S_r * PH;
-
- // calculate strip extremes (pixel coordinates)
- float32 XLimitL = (PLimitL - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- float32 XLimitR = (PLimitR - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- float32 xL = (PL - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- float32 xR = (PR - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get strip extremes in column indices
- x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f);
- x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f);
-
- // get coords w.r.t leftmost column hit by strip
- x2L = xL - x1L;
- x2R = xR - x1L;
-
- // update strip extremes for the next row
- XLimitL += updateX_left;
- XLimitR += updateX_right;
- xL += updateX_left;
- xR += updateX_right;
-
- // for each affected col
- for (col = x1L; col <= x1R; ++col) {
-
- if (col < 0 || col >= m_pVolumeGeometry->getGridColCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col);
- // POLICY: PIXEL PRIOR
- if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // right
- if (x2R >= V_r) res = 1.0f;
- else if (x2R > U_r) res = x2R - (x2R-U_r)*(x2R-U_r)*inv_4T_r;
- else if (x2R >= T_r) res = x2R;
- else if (x2R > S_r) res = (x2R-S_r)*(x2R-S_r) * inv_4T_r;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // left
- if (x2L <= S_l) {}
- else if (x2L < T_l) res -= (x2L-S_l)*(x2L-S_l) * inv_4T_l;
- else if (x2L <= U_l) res -= x2L;
- else if (x2L < V_l) res -= x2L - (x2L-U_l)*(x2L-U_l)*inv_4T_l;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // POLICY: ADD
- p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res);
-
- // POLICY: PIXEL POSTERIOR
- p.pixelPosterior(iVolumeIndex);
-
- x2L -= 1.0f;
- x2R -= 1.0f;
-
- } // end col loop
-
- } // end row loop
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end detector loop
-
- // [45?,135?] and [225?,315?]
- // horizontaly
- } else {
-
- // loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) continue;
-
- // get theta_l = alpha_left + theta and theta_r = alpha_right + theta
- float32 sin_theta_left, cos_theta_left;
- float32 sin_theta_right, cos_theta_right;
- float32 t_l, t_r;
- if (!switch_t) {
- sin_theta_left = sin_theta * cos_alpha[iDetector] + cos_theta * sin_alpha[iDetector];
- sin_theta_right = sin_theta * cos_alpha[iDetector+1] + cos_theta * sin_alpha[iDetector+1];
-
- cos_theta_left = cos_theta * cos_alpha[iDetector] - sin_theta * sin_alpha[iDetector];
- cos_theta_right = cos_theta * cos_alpha[iDetector+1] - sin_theta * sin_alpha[iDetector+1];
-
- t_l = sin_alpha[iDetector] * projgeom->getOriginSourceDistance();
- t_r = sin_alpha[iDetector+1] * projgeom->getOriginSourceDistance();
-
- } else {
- sin_theta_left = sin_theta * cos_alpha[iDetector+1] + cos_theta * sin_alpha[iDetector+1];
- sin_theta_right = sin_theta * cos_alpha[iDetector] + cos_theta * sin_alpha[iDetector];
-
- cos_theta_left = cos_theta * cos_alpha[iDetector+1] - sin_theta * sin_alpha[iDetector+1];
- cos_theta_right = cos_theta * cos_alpha[iDetector] - sin_theta * sin_alpha[iDetector];
-
- t_l = -sin_alpha[iDetector+1] * projgeom->getOriginSourceDistance();
- t_r = -sin_alpha[iDetector] * projgeom->getOriginSourceDistance();
- }
-
- float32 inv_sin_theta_left = 1.0f / sin_theta_left;
- float32 inv_sin_theta_right = 1.0f / sin_theta_right;
-
- float32 updateX_left = cos_theta_left * inv_sin_theta_left;
- float32 updateX_right = cos_theta_right * inv_sin_theta_right;
-
- // Precalculate kernel limits
- float32 S_l = -0.5f * updateX_left;
- if (S_l > 0) { S_l = -S_l; }
- float32 T_l = -S_l;
- float32 U_l = 1.0f + S_l;
- float32 V_l = 1.0f - S_l;
- float32 inv_4T_l = 0.25f / T_l;
-
- float32 S_r = -0.5f * updateX_right;
- if (S_r > 0) { S_r = -S_r; }
- float32 T_r = -S_r;
- float32 U_r = 1.0f + S_r;
- float32 V_r = 1.0f - S_r;
- float32 inv_4T_r = 0.25f / T_r;
-
- // calculate strip extremes (volume coordinates)
- float32 PL = (t_l - cos_theta_left * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta_left;
- float32 PR = (t_r - cos_theta_right * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta_right;
- float32 PLimitL = PL - S_l * PW;
- float32 PLimitR = PR + S_r * PW;
-
- // calculate strip extremes (pixel coordinates)
- float32 XLimitL = (m_pVolumeGeometry->getWindowMaxY() - PLimitL) * inv_PH;
- float32 XLimitR = (m_pVolumeGeometry->getWindowMaxY() - PLimitR) * inv_PH;
- float32 xL = (m_pVolumeGeometry->getWindowMaxY() - PL) * inv_PH;
- float32 xR = (m_pVolumeGeometry->getWindowMaxY() - PR) * inv_PH;
-
- // for each col
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get strip extremes in column indices
- x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f);
- x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f);
-
- // get coords w.r.t leftmost column hit by strip
- x2L = xL - x1L;
- x2R = xR - x1L;
-
- // update strip extremes for the next row
- XLimitL += updateX_left;
- XLimitR += updateX_right;
- xL += updateX_left;
- xR += updateX_right;
-
- // for each affected row
- for (row = x1L; row <= x1R; ++row) {
-
- if (row < 0 || row >= m_pVolumeGeometry->getGridRowCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col);
-
- // POLICY: PIXEL PRIOR
- if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // right
- if (x2R >= V_r) res = 1.0f;
- else if (x2R > U_r) res = x2R - (x2R-U_r)*(x2R-U_r)*inv_4T_r;
- else if (x2R >= T_r) res = x2R;
- else if (x2R > S_r) res = (x2R-S_r)*(x2R-S_r) * inv_4T_r;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // left
- if (x2L <= S_l) {}
- else if (x2L < T_l) res -= (x2L-S_l)*(x2L-S_l) * inv_4T_l;
- else if (x2L <= U_l) res -= x2L;
- else if (x2L < V_l) res -= x2L - (x2L-U_l)*(x2L-U_l)*inv_4T_l;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // POLICY: ADD
- p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res);
-
- // POLICY: PIXEL POSTERIOR
- p.pixelPosterior(iVolumeIndex);
-
- x2L -= 1.0f;
- x2R -= 1.0f;
-
- } // end col loop
-
- } // end row loop
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end detector loop
-
- } // end theta switch
-
- delete[] cos_alpha;
- delete[] sin_alpha;
-}
-
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE RAY
-template <typename Policy>
-void CFanFlatBeamStripKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
-{
- ASTRA_ASSERT(m_bIsInitialized);
-
- // Some variables
- float32 theta;
- int row, col;
- float32 res;
- int x1L, x1R;
- float32 x2L, x2R;
- int iVolumeIndex, iRayIndex;
-
- CFanFlatProjectionGeometry2D* projgeom = static_cast<CFanFlatProjectionGeometry2D*>(m_pProjectionGeometry);
-
- // Other precalculations
- float32 PW = m_pVolumeGeometry->getPixelLengthX();
- float32 PH = m_pVolumeGeometry->getPixelLengthY();
- float32 DW = m_pProjectionGeometry->getDetectorWidth();
- float32 inv_PW = 1.0f / PW;
- float32 inv_PH = 1.0f / PH;
-
- // calculate alpha's
- float32 alpha;
- float32* cos_alpha = new float32[m_pProjectionGeometry->getDetectorCount() + 1];
- float32* sin_alpha = new float32[m_pProjectionGeometry->getDetectorCount() + 1];
- for (int i = 0; i < m_pProjectionGeometry->getDetectorCount() + 1; ++i) {
- alpha = -atan((i - m_pProjectionGeometry->getDetectorCount()*0.5f) * DW / projgeom->getSourceDetectorDistance());
- cos_alpha[i] = cos(alpha);
- sin_alpha[i] = sin(alpha);
- }
-
-
- // get values
- theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- bool switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // Precalculate sin, cos, 1/cos
- float32 sin_theta = sin(theta);
- float32 cos_theta = cos(theta);
-
- // [-45?,45?] and [135?,225?]
- if (theta < PIdiv4) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + _iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) { delete[] cos_alpha; delete[] sin_alpha; return; }
-
- float32 sin_theta_left, cos_theta_left;
- float32 sin_theta_right, cos_theta_right;
-
- // get theta_l = alpha_left + theta and theta_r = alpha_right + theta
- float32 t_l, t_r;
- if (!switch_t) {
- sin_theta_left = sin_theta * cos_alpha[_iDetector+1] + cos_theta * sin_alpha[_iDetector+1];
- sin_theta_right = sin_theta * cos_alpha[_iDetector] + cos_theta * sin_alpha[_iDetector];
-
- cos_theta_left = cos_theta * cos_alpha[_iDetector+1] - sin_theta * sin_alpha[_iDetector+1];
- cos_theta_right = cos_theta * cos_alpha[_iDetector] - sin_theta * sin_alpha[_iDetector];
-
- t_l = sin_alpha[_iDetector+1] * projgeom->getOriginSourceDistance();
- t_r = sin_alpha[_iDetector] * projgeom->getOriginSourceDistance();
-
- } else {
- sin_theta_left = sin_theta * cos_alpha[_iDetector] + cos_theta * sin_alpha[_iDetector];
- sin_theta_right = sin_theta * cos_alpha[_iDetector+1] + cos_theta * sin_alpha[_iDetector+1];
-
- cos_theta_left = cos_theta * cos_alpha[_iDetector] - sin_theta * sin_alpha[_iDetector];
- cos_theta_right = cos_theta * cos_alpha[_iDetector+1] - sin_theta * sin_alpha[_iDetector+1];
-
- t_l = -sin_alpha[_iDetector] * projgeom->getOriginSourceDistance();
- t_r = -sin_alpha[_iDetector+1] * projgeom->getOriginSourceDistance();
- }
-
- float32 inv_cos_theta_left = 1.0f / cos_theta_left;
- float32 inv_cos_theta_right = 1.0f / cos_theta_right;
-
- float32 updateX_left = sin_theta_left * inv_cos_theta_left;
- float32 updateX_right = sin_theta_right * inv_cos_theta_right;
-
- // Precalculate kernel limits
- float32 S_l = -0.5f * updateX_left;
- if (S_l > 0) {S_l = -S_l;}
- float32 T_l = -S_l;
- float32 U_l = 1.0f + S_l;
- float32 V_l = 1.0f - S_l;
- float32 inv_4T_l = 0.25f / T_l;
-
- float32 S_r = -0.5f * updateX_right;
- if (S_r > 0) {S_r = -S_r;}
- float32 T_r = -S_r;
- float32 U_r = 1.0f + S_r;
- float32 V_r = 1.0f - S_r;
- float32 inv_4T_r = 0.25f / T_r;
-
- // calculate strip extremes (volume coordinates)
- float32 PL = (t_l - sin_theta_left * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta_left;
- float32 PR = (t_r - sin_theta_right * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta_right;
- float32 PLimitL = PL + S_l * PH;
- float32 PLimitR = PR - S_r * PH;
-
- // calculate strip extremes (pixel coordinates)
- float32 XLimitL = (PLimitL - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- float32 XLimitR = (PLimitR - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- float32 xL = (PL - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- float32 xR = (PR - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get strip extremes in column indices
- x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f);
- x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f);
-
- // get coords w.r.t leftmost column hit by strip
- x2L = xL - x1L;
- x2R = xR - x1L;
-
- // update strip extremes for the next row
- XLimitL += updateX_left;
- XLimitR += updateX_right;
- xL += updateX_left;
- xR += updateX_right;
-
- // for each affected col
- for (col = x1L; col <= x1R; ++col) {
-
- if (col < 0 || col >= m_pVolumeGeometry->getGridColCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col);
- // POLICY: PIXEL PRIOR
- if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // right
- if (x2R >= V_r) res = 1.0f;
- else if (x2R > U_r) res = x2R - (x2R-U_r)*(x2R-U_r)*inv_4T_r;
- else if (x2R >= T_r) res = x2R;
- else if (x2R > S_r) res = (x2R-S_r)*(x2R-S_r) * inv_4T_r;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // left
- if (x2L <= S_l) {}
- else if (x2L < T_l) res -= (x2L-S_l)*(x2L-S_l) * inv_4T_l;
- else if (x2L <= U_l) res -= x2L;
- else if (x2L < V_l) res -= x2L - (x2L-U_l)*(x2L-U_l)*inv_4T_l;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // POLICY: ADD
- p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res);
-
- // POLICY: PIXEL POSTERIOR
- p.pixelPosterior(iVolumeIndex);
-
- x2L -= 1.0f;
- x2R -= 1.0f;
-
- } // end col loop
-
- } // end row loop
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- // [45?,135?] and [225?,315?]
- // horizontaly
- } else {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + _iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) { delete[] cos_alpha; delete[] sin_alpha; return; }
-
- // get theta_l = alpha_left + theta and theta_r = alpha_right + theta
- float32 sin_theta_left, cos_theta_left;
- float32 sin_theta_right, cos_theta_right;
- float32 t_l, t_r;
- if (!switch_t) {
- sin_theta_left = sin_theta * cos_alpha[_iDetector] + cos_theta * sin_alpha[_iDetector];
- sin_theta_right = sin_theta * cos_alpha[_iDetector+1] + cos_theta * sin_alpha[_iDetector+1];
-
- cos_theta_left = cos_theta * cos_alpha[_iDetector] - sin_theta * sin_alpha[_iDetector];
- cos_theta_right = cos_theta * cos_alpha[_iDetector+1] - sin_theta * sin_alpha[_iDetector+1];
-
- t_l = sin_alpha[_iDetector] * projgeom->getOriginSourceDistance();
- t_r = sin_alpha[_iDetector+1] * projgeom->getOriginSourceDistance();
-
- } else {
- sin_theta_left = sin_theta * cos_alpha[_iDetector+1] + cos_theta * sin_alpha[_iDetector+1];
- sin_theta_right = sin_theta * cos_alpha[_iDetector] + cos_theta * sin_alpha[_iDetector];
-
- cos_theta_left = cos_theta * cos_alpha[_iDetector+1] - sin_theta * sin_alpha[_iDetector+1];
- cos_theta_right = cos_theta * cos_alpha[_iDetector] - sin_theta * sin_alpha[_iDetector];
-
- t_l = -sin_alpha[_iDetector+1] * projgeom->getOriginSourceDistance();
- t_r = -sin_alpha[_iDetector] * projgeom->getOriginSourceDistance();
- }
-
- float32 inv_sin_theta_left = 1.0f / sin_theta_left;
- float32 inv_sin_theta_right = 1.0f / sin_theta_right;
-
- float32 updateX_left = cos_theta_left * inv_sin_theta_left;
- float32 updateX_right = cos_theta_right * inv_sin_theta_right;
-
- // Precalculate kernel limits
- float32 S_l = -0.5f * updateX_left;
- if (S_l > 0) { S_l = -S_l; }
- float32 T_l = -S_l;
- float32 U_l = 1.0f + S_l;
- float32 V_l = 1.0f - S_l;
- float32 inv_4T_l = 0.25f / T_l;
-
- float32 S_r = -0.5f * updateX_right;
- if (S_r > 0) { S_r = -S_r; }
- float32 T_r = -S_r;
- float32 U_r = 1.0f + S_r;
- float32 V_r = 1.0f - S_r;
- float32 inv_4T_r = 0.25f / T_r;
-
- // calculate strip extremes (volume coordinates)
- float32 PL = (t_l - cos_theta_left * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta_left;
- float32 PR = (t_r - cos_theta_right * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta_right;
- float32 PLimitL = PL - S_l * PW;
- float32 PLimitR = PR + S_r * PW;
-
- // calculate strip extremes (pixel coordinates)
- float32 XLimitL = (m_pVolumeGeometry->getWindowMaxY() - PLimitL) * inv_PH;
- float32 XLimitR = (m_pVolumeGeometry->getWindowMaxY() - PLimitR) * inv_PH;
- float32 xL = (m_pVolumeGeometry->getWindowMaxY() - PL) * inv_PH;
- float32 xR = (m_pVolumeGeometry->getWindowMaxY() - PR) * inv_PH;
-
- // for each col
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get strip extremes in column indices
- x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f);
- x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f);
-
- // get coords w.r.t leftmost column hit by strip
- x2L = xL - x1L;
- x2R = xR - x1L;
-
- // update strip extremes for the next row
- XLimitL += updateX_left;
- XLimitR += updateX_right;
- xL += updateX_left;
- xR += updateX_right;
-
- // for each affected row
- for (row = x1L; row <= x1R; ++row) {
-
- if (row < 0 || row >= m_pVolumeGeometry->getGridRowCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col);
-
- // POLICY: PIXEL PRIOR
- if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // right
- if (x2R >= V_r) res = 1.0f;
- else if (x2R > U_r) res = x2R - (x2R-U_r)*(x2R-U_r)*inv_4T_r;
- else if (x2R >= T_r) res = x2R;
- else if (x2R > S_r) res = (x2R-S_r)*(x2R-S_r) * inv_4T_r;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // left
- if (x2L <= S_l) {}
- else if (x2L < T_l) res -= (x2L-S_l)*(x2L-S_l) * inv_4T_l;
- else if (x2L <= U_l) res -= x2L;
- else if (x2L < V_l) res -= x2L - (x2L-U_l)*(x2L-U_l)*inv_4T_l;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // POLICY: ADD
- p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res);
-
- // POLICY: PIXEL POSTERIOR
- p.pixelPosterior(iVolumeIndex);
-
- x2L -= 1.0f;
- x2R -= 1.0f;
-
- } // end col loop
-
- } // end row loop
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end theta switch
-
- delete[] cos_alpha;
- delete[] sin_alpha;
-}
diff --git a/include/astra/ParallelBeamLineKernelProjector2D.h b/include/astra/ParallelBeamLineKernelProjector2D.h
index 9e2cc5a..64b5ef3 100644
--- a/include/astra/ParallelBeamLineKernelProjector2D.h
+++ b/include/astra/ParallelBeamLineKernelProjector2D.h
@@ -173,6 +173,13 @@ public:
*/
virtual std::string getType();
+
+protected:
+ /** Internal policy-based projection of a range of angles and range.
+ * (_i*From is inclusive, _i*To exclusive) */
+ template <typename Policy>
+ void projectBlock_internal(int _iProjFrom, int _iProjTo,
+ int _iDetFrom, int _iDetTo, Policy& _policy);
};
inline std::string CParallelBeamLineKernelProjector2D::getType()
diff --git a/include/astra/ParallelBeamLineKernelProjector2D.inl b/include/astra/ParallelBeamLineKernelProjector2D.inl
index 08bbe5f..149ac46 100644
--- a/include/astra/ParallelBeamLineKernelProjector2D.inl
+++ b/include/astra/ParallelBeamLineKernelProjector2D.inl
@@ -26,12 +26,32 @@ along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
$Id$
*/
+template <typename Policy>
+void CParallelBeamLineKernelProjector2D::project(Policy& p)
+{
+ projectBlock_internal(0, m_pProjectionGeometry->getProjectionAngleCount(),
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CParallelBeamLineKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CParallelBeamLineKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ _iDetector, _iDetector + 1, p);
+}
//----------------------------------------------------------------------------------------
-// PROJECT ALL
+// PROJECT BLOCK
template <typename Policy>
-void CParallelBeamLineKernelProjector2D::project(Policy& p)
+void CParallelBeamLineKernelProjector2D::projectBlock_internal(int _iProjFrom, int _iProjTo, int _iDetFrom, int _iDetTo, Policy& p)
{
// variables
float32 theta, sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, S, T, t, I, P, x, x2;
@@ -40,7 +60,7 @@ void CParallelBeamLineKernelProjector2D::project(Policy& p)
bool switch_t;
// loop angles
- for (iAngle = 0; iAngle < m_pProjectionGeometry->getProjectionAngleCount(); ++iAngle) {
+ for (iAngle = _iProjFrom; iAngle < _iProjTo; ++iAngle) {
// get theta
theta = m_pProjectionGeometry->getProjectionAngle(iAngle);
@@ -72,7 +92,7 @@ void CParallelBeamLineKernelProjector2D::project(Policy& p)
T = 0.5f - 0.5f * ((updatePerCol < 0) ? -updatePerCol : updatePerCol);
// loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
+ for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) {
iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector;
@@ -267,465 +287,3 @@ void CParallelBeamLineKernelProjector2D::project(Policy& p)
}
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE PROJECTION
-template <typename Policy>
-void CParallelBeamLineKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
-{
- // variables
- float32 theta, sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, S, T, t, I, P, x, x2;
- float32 lengthPerRow, updatePerRow, inv_pixelLengthX, lengthPerCol, updatePerCol, inv_pixelLengthY;
- int iVolumeIndex, iRayIndex, row, col, iDetector, x1;
- bool switch_t;
-
- // get theta
- theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // precalculate sin, cos, 1/cos
- sin_theta = sin(theta);
- cos_theta = cos(theta);
- inv_sin_theta = 1.0f / sin_theta;
- inv_cos_theta = 1.0f / cos_theta;
-
- // precalculate kernel limits
- lengthPerRow = m_pVolumeGeometry->getPixelLengthY() * inv_cos_theta;
- updatePerRow = sin_theta * inv_cos_theta;
- inv_pixelLengthX = 1.0f / m_pVolumeGeometry->getPixelLengthX();
-
- // precalculate kernel limits
- lengthPerCol = m_pVolumeGeometry->getPixelLengthX() * inv_sin_theta;
- updatePerCol = cos_theta * inv_sin_theta;
- inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY();
-
- // precalculate S and T
- S = 0.5f - 0.5f * ((updatePerRow < 0) ? -updatePerRow : updatePerRow);
- T = 0.5f - 0.5f * ((updatePerCol < 0) ? -updatePerCol : updatePerCol);
-
- // loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) continue;
-
- // get t
- t = m_pProjectionGeometry->indexToDetectorOffset(iDetector);
- if (switch_t) t = -t;
-
- // vertically
- if (theta <= PIdiv4) {
-
- // calculate x for row 0
- P = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta;
- x = (P - m_pVolumeGeometry->getWindowMinX()) * inv_pixelLengthX;
-
- // get coords
- int nextx1 = int((x > 0.0f) ? x : x-1.0f);
- float nextx2 = x - nextx1;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- x1 = nextx1;
- x2 = nextx2;
-
- nextx2 += updatePerRow;
- while (nextx2 >= 1.0f) {
- nextx2 -= 1.0f;
- nextx1++;
- }
- while (nextx2 < 0.0f) {
- nextx2 += 1.0f;
- nextx1--;
- }
-
- if (x1 < -1 || x1 > m_pVolumeGeometry->getGridColCount()) continue;
-
- // left
- if (x2 < 0.5f-S) {
- I = (0.5f - S + x2) / (1.0f - 2.0f*S) * lengthPerRow;
-
- if (x1-1 >= 0 && x1-1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1-1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // center
- else if (x2 <= 0.5f+S) {
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // right
- else {
- I = (1.5f - S - x2) / (1.0f - 2.0f*S) * lengthPerRow;
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1+1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
- }
-
- // horizontally
- else if (PIdiv4 <= theta && theta <= 3*PIdiv4) {
-
- // calculate point P
- P = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta;
- x = (m_pVolumeGeometry->getWindowMaxY() - P) * inv_pixelLengthY;
-
- // get coords
- int nextx1 = int((x > 0.0f) ? x : x-1.0f);
- float nextx2 = x - nextx1;
-
- // for each col
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- x1 = nextx1;
- x2 = nextx2;
-
- nextx2 += updatePerCol;
- while (nextx2 >= 1.0f) {
- nextx2 -= 1.0f;
- nextx1++;
- }
- while (nextx2 < 0.0f) {
- nextx2 += 1.0f;
- nextx1--;
- }
-
- if (x1 < -1 || x1 > m_pVolumeGeometry->getGridRowCount()) continue;
-
- // up
- if (x2 < 0.5f-T) {
- I = (0.5f - T + x2) / (1.0f - 2.0f*T) * lengthPerCol;
-
- if (x1-1 >= 0 && x1-1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1-1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // center
- else if (x2 <= 0.5f+T) {
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // down
- else {
- I = (1.5f - T - x2) / (1.0f - 2.0f*T) * lengthPerCol;
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1+1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
- } // end loop col
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end loop detector
-}
-
-
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE RAY
-template <typename Policy>
-void CParallelBeamLineKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
-{
- int iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + _iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) return;
-
- // variables
- float32 t, I, P, x, x2;
- int iVolumeIndex, row, col, x1;
-
- // get theta
- float32 theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- bool switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // get t
- t = m_pProjectionGeometry->indexToDetectorOffset(_iDetector);
- if (switch_t) t = -t;
-
- // vertically
- if (theta <= PIdiv4) {
-
- float32 sin_theta = sin(theta);
- float32 inv_cos_theta = 1.0f / cos(theta);
-
- // precalculate kernel limits
- float32 lengthPerRow = m_pVolumeGeometry->getPixelLengthY() * inv_cos_theta;
- float32 updatePerRow = sin_theta * inv_cos_theta;
- float32 inv_pixelLengthX = 1.0f / m_pVolumeGeometry->getPixelLengthX();
- float32 S = 0.5f - 0.5f * ((updatePerRow < 0) ? -updatePerRow : updatePerRow);
-
- // calculate x for row 0
- P = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta;
- x = (P - m_pVolumeGeometry->getWindowMinX()) * inv_pixelLengthX;
-
- // get coords
- int nextx1 = int((x > 0.0f) ? x : x-1.0f);
- float nextx2 = x - nextx1;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- x1 = nextx1;
- x2 = nextx2;
-
- nextx2 += updatePerRow;
- while (nextx2 >= 1.0f) {
- nextx2 -= 1.0f;
- nextx1++;
- }
- while (nextx2 < 0.0f) {
- nextx2 += 1.0f;
- nextx1--;
- }
-
- if (x1 < -1 || x1 > m_pVolumeGeometry->getGridColCount()) continue;
-
- // left
- if (x2 < 0.5f-S) {
- I = (0.5f - S + x2) / (1.0f - 2.0f*S) * lengthPerRow;
-
- if (x1-1 >= 0 && x1-1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1-1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // center
- else if (x2 <= 0.5f+S) {
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // right
- else {
- I = (1.5f - S - x2) / (1.0f - 2.0f*S) * lengthPerRow;
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1+1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerRow-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
- }
-
- // horizontally
- else if (PIdiv4 <= theta && theta <= 3*PIdiv4) {
-
- float32 cos_theta = cos(theta);
- float32 inv_sin_theta = 1.0f / sin(theta);
-
- // precalculate kernel limits
- float32 lengthPerCol = m_pVolumeGeometry->getPixelLengthX() * inv_sin_theta;
- float32 updatePerCol = cos_theta * inv_sin_theta;
- float32 inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY();
- float32 T = 0.5f - 0.5f * ((updatePerCol < 0) ? -updatePerCol : updatePerCol);
-
- // calculate point P
- P = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta;
- x = (m_pVolumeGeometry->getWindowMaxY() - P) * inv_pixelLengthY;
-
- // get coords
- int nextx1 = int((x > 0.0f) ? x : x-1.0f);
- float nextx2 = x - nextx1;
-
- // for each col
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- x1 = nextx1;
- x2 = nextx2;
-
- nextx2 += updatePerCol;
- while (nextx2 >= 1.0f) {
- nextx2 -= 1.0f;
- nextx1++;
- }
- while (nextx2 < 0.0f) {
- nextx2 += 1.0f;
- nextx1--;
- }
-
- if (x1 < -1 || x1 > m_pVolumeGeometry->getGridRowCount()) continue;
-
- // up
- if (x2 < 0.5f-T) {
- I = (0.5f - T + x2) / (1.0f - 2.0f*T) * lengthPerCol;
-
- if (x1-1 >= 0 && x1-1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1-1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // center
- else if (x2 <= 0.5f+T) {
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
-
- // down
- else {
- I = (1.5f - T - x2) / (1.0f - 2.0f*T) * lengthPerCol;
-
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1+1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, lengthPerCol-I);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
- } // end loop col
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
-}
diff --git a/include/astra/ParallelBeamLinearKernelProjector2D.h b/include/astra/ParallelBeamLinearKernelProjector2D.h
index ac5899e..0a011f1 100644
--- a/include/astra/ParallelBeamLinearKernelProjector2D.h
+++ b/include/astra/ParallelBeamLinearKernelProjector2D.h
@@ -177,6 +177,15 @@ public:
*/
virtual std::string getType();
+
+protected:
+ /** Internal policy-based projection of a range of angles and range.
+ * (_i*From is inclusive, _i*To exclusive) */
+ template <typename Policy>
+ void projectBlock_internal(int _iProjFrom, int _iProjTo,
+ int _iDetFrom, int _iDetTo, Policy& _policy);
+
+
};
//----------------------------------------------------------------------------------------
diff --git a/include/astra/ParallelBeamLinearKernelProjector2D.inl b/include/astra/ParallelBeamLinearKernelProjector2D.inl
index 66b1cb2..d545f30 100644
--- a/include/astra/ParallelBeamLinearKernelProjector2D.inl
+++ b/include/astra/ParallelBeamLinearKernelProjector2D.inl
@@ -27,11 +27,31 @@ $Id$
*/
+template <typename Policy>
+void CParallelBeamLinearKernelProjector2D::project(Policy& p)
+{
+ projectBlock_internal(0, m_pProjectionGeometry->getProjectionAngleCount(),
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CParallelBeamLinearKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CParallelBeamLinearKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ _iDetector, _iDetector + 1, p);
+}
//----------------------------------------------------------------------------------------
-// PROJECT ALL
+// PROJECT BLOCK
template <typename Policy>
-void CParallelBeamLinearKernelProjector2D::project(Policy& p)
+void CParallelBeamLinearKernelProjector2D::projectBlock_internal(int _iProjFrom, int _iProjTo, int _iDetFrom, int _iDetTo, Policy& p)
{
// variables
float32 theta, sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, t;
@@ -43,7 +63,7 @@ void CParallelBeamLinearKernelProjector2D::project(Policy& p)
float32 P,x,x2;
// loop angles
- for (iAngle = 0; iAngle < m_pProjectionGeometry->getProjectionAngleCount(); ++iAngle) {
+ for (iAngle = _iProjFrom; iAngle < _iProjTo; ++iAngle) {
// get theta
theta = m_pProjectionGeometry->getProjectionAngle(iAngle);
@@ -71,7 +91,7 @@ void CParallelBeamLinearKernelProjector2D::project(Policy& p)
inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY();
// loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
+ for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) {
iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector;
@@ -162,255 +182,3 @@ void CParallelBeamLinearKernelProjector2D::project(Policy& p)
}
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE PROJECTION
-template <typename Policy>
-void CParallelBeamLinearKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
-{
- // variables
- float32 theta, sin_theta, cos_theta, inv_sin_theta, inv_cos_theta, t;
- float32 lengthPerRow, updatePerRow, inv_pixelLengthX;
- float32 lengthPerCol, updatePerCol, inv_pixelLengthY;
- bool switch_t;
- int iDetector, iVolumeIndex, iRayIndex;
- int row, col, x1;
- float32 P,x,x2;
-
- // get theta
- theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // precalculate sin, cos, 1/cos
- sin_theta = sin(theta);
- cos_theta = cos(theta);
- inv_cos_theta = 1.0f / cos_theta;
- inv_sin_theta = 1.0f / sin_theta;
-
- // precalculate kernel limits
- lengthPerRow = m_pVolumeGeometry->getPixelLengthY() * inv_cos_theta;
- updatePerRow = sin_theta * inv_cos_theta;
- inv_pixelLengthX = 1.0f / m_pVolumeGeometry->getPixelLengthX();
-
- // precalculate kernel limits
- lengthPerCol = m_pVolumeGeometry->getPixelLengthX() * inv_sin_theta;
- updatePerCol = cos_theta * inv_sin_theta;
- inv_pixelLengthY = 1.0f / m_pVolumeGeometry->getPixelLengthY();
-
- // loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) continue;
-
- // get t
- t = m_pProjectionGeometry->indexToDetectorOffset(iDetector);
- if (switch_t) {
- t = -t;
- }
-
- // vertically
- if (theta <= PIdiv4) {
-
- // calculate x for row 0
- P = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta;
- x = m_pVolumeGeometry->coordXToColF(P) - 0.5f;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get coords
- x1 = (int)((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerRow;
-
- // add weights
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (1.0f - x2) * lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1+1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (x2) * lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
-
- // horizontally
- else if (PIdiv4 <= theta && theta <= 3*PIdiv4) {
-
- // calculate point P
- P = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta;
- x = m_pVolumeGeometry->coordYToRowF(P) - 0.5f;
-
- // for each row
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get coords
- x1 = (int)((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerCol;
-
- // add weights
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (1.0f - x2) * lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1+1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, x2 * lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end loop detector
-}
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE RAY
-template <typename Policy>
-void CParallelBeamLinearKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
-{
- int iVolumeIndex, iRayIndex;
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + _iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) return;
-
- // get theta
- float32 theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- bool switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // get t
- float32 t = m_pProjectionGeometry->indexToDetectorOffset(_iDetector);
- if (switch_t) {
- t = -t;
- }
-
- // vertically
- if (theta <= PIdiv4) {
-
- // precalculate sin, 1/cos
- float32 sin_theta = sin(theta);
- float32 inv_cos_theta = 1.0f / cos(theta);
-
- // precalculate kernel limits
- float32 lengthPerRow = m_pVolumeGeometry->getPixelLengthY() * inv_cos_theta;
- float32 updatePerRow = sin_theta * inv_cos_theta;
-
- int row, x1;
- float32 P,x,x2;
-
- // calculate x for row 0
- P = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0)) * inv_cos_theta;
- x = m_pVolumeGeometry->coordXToColF(P) - 0.5f;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get coords
- x1 = (int)((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerRow;
-
- // add weights
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (1.0f - x2) * lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridColCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, x1+1);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (x2) * lengthPerRow);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
-
- // horizontally
- else if (PIdiv4 <= theta && theta <= 3*PIdiv4) {
-
- // precalculate cos 1/sin
- float32 cos_theta = cos(theta);
- float32 inv_sin_theta = 1.0f / sin(theta);
-
- // precalculate kernel limits
- float32 lengthPerCol = m_pVolumeGeometry->getPixelLengthX() * inv_sin_theta;
- float32 updatePerCol = cos_theta * inv_sin_theta;
-
- int col, x1;
- float32 P,x,x2;
-
- // calculate point P
- P = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0)) * inv_sin_theta;
- x = m_pVolumeGeometry->coordYToRowF(P) - 0.5f;
-
- // for each row
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get coords
- x1 = (int)((x > 0.0f) ? x : x-1.0f);
- x2 = x - x1;
- x += updatePerCol;
-
- // add weights
- if (x1 >= 0 && x1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, (1.0f - x2) * lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- if (x1+1 >= 0 && x1+1 < m_pVolumeGeometry->getGridRowCount()) {
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(x1+1, col);
- // POLICY: PIXEL PRIOR + ADD + POSTERIOR
- if (p.pixelPrior(iVolumeIndex)) {
- p.addWeight(iRayIndex, iVolumeIndex, x2 * lengthPerCol);
- p.pixelPosterior(iVolumeIndex);
- }
- }
- }
- }
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-}
diff --git a/include/astra/ParallelBeamStripKernelProjector2D.h b/include/astra/ParallelBeamStripKernelProjector2D.h
index de056de..e3808ca 100644
--- a/include/astra/ParallelBeamStripKernelProjector2D.h
+++ b/include/astra/ParallelBeamStripKernelProjector2D.h
@@ -176,6 +176,13 @@ protected:
*/
virtual std::string getType();
+
+ /** Internal policy-based projection of a range of angles and range.
+ * (_i*From is inclusive, _i*To exclusive) */
+ template <typename Policy>
+ void projectBlock_internal(int _iProjFrom, int _iProjTo,
+ int _iDetFrom, int _iDetTo, Policy& _policy);
+
};
//----------------------------------------------------------------------------------------
diff --git a/include/astra/ParallelBeamStripKernelProjector2D.inl b/include/astra/ParallelBeamStripKernelProjector2D.inl
index c55fa8e..a9168ee 100644
--- a/include/astra/ParallelBeamStripKernelProjector2D.inl
+++ b/include/astra/ParallelBeamStripKernelProjector2D.inl
@@ -26,11 +26,31 @@ along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
$Id$
*/
+template <typename Policy>
+void CParallelBeamStripKernelProjector2D::project(Policy& p)
+{
+ projectBlock_internal(0, m_pProjectionGeometry->getProjectionAngleCount(),
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CParallelBeamStripKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ 0, m_pProjectionGeometry->getDetectorCount(), p);
+}
+
+template <typename Policy>
+void CParallelBeamStripKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
+{
+ projectBlock_internal(_iProjection, _iProjection + 1,
+ _iDetector, _iDetector + 1, p);
+}
//----------------------------------------------------------------------------------------
-// PROJECT ALL
+// PROJECT BLOCK
template <typename Policy>
-void CParallelBeamStripKernelProjector2D::project(Policy& p)
+void CParallelBeamStripKernelProjector2D::projectBlock_internal(int _iProjFrom, int _iProjTo, int _iDetFrom, int _iDetTo, Policy& p)
{
ASTRA_ASSERT(m_bIsInitialized);
@@ -52,7 +72,7 @@ void CParallelBeamStripKernelProjector2D::project(Policy& p)
float32 S, T, U, V, inv_4T;
// loop angles
- for (iAngle = 0; iAngle < m_pProjectionGeometry->getProjectionAngleCount(); ++iAngle) {
+ for (iAngle = _iProjFrom; iAngle < _iProjTo; ++iAngle) {
// get values
theta = m_pProjectionGeometry->getProjectionAngle(iAngle);
@@ -94,7 +114,7 @@ void CParallelBeamStripKernelProjector2D::project(Policy& p)
updateX = sin_theta * inv_cos_theta;
// loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
+ for (iDetector = _iDetFrom; iDetector < _iDetTo; ++iDetector) {
iRayIndex = iAngle * m_pProjectionGeometry->getDetectorCount() + iDetector;
@@ -276,464 +296,3 @@ void CParallelBeamStripKernelProjector2D::project(Policy& p)
}
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE PROJECTION
-template <typename Policy>
-void CParallelBeamStripKernelProjector2D::projectSingleProjection(int _iProjection, Policy& p)
-{
- // Some variables
- float32 theta, t;
- int row, col, iDetector;
- float32 res;
- float32 PL, PLimitL, PLimitR;
- float32 xL, xR, XLimitL, XLimitR;
- int x1L,x1R;
- float32 x2L, x2R, updateX;
- int iVolumeIndex, iRayIndex;
-
- float32 sin_theta, cos_theta, inv_sin_theta, inv_cos_theta;
- float32 fabs_sin_theta, fabs_cos_theta, fabs_inv_sin_theta, fabs_inv_cos_theta;
- float32 PW, PH, DW, inv_PW, inv_PH;
- float32 S, T, U, V, inv_4T;
-
- // get values
- theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- bool switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // Precalculate sin, cos, 1/cos
- sin_theta = sin(theta);
- cos_theta = cos(theta);
- inv_cos_theta = 1.0f / cos_theta;
- inv_sin_theta = 1.0f / sin_theta;
-
- fabs_sin_theta = (sin_theta < 0.0f) ? -sin_theta : sin_theta;
- fabs_cos_theta = (cos_theta < 0.0f) ? -cos_theta : cos_theta;
- fabs_inv_cos_theta = (inv_cos_theta < 0.0f) ? -inv_cos_theta : inv_cos_theta;
- fabs_inv_sin_theta = (inv_sin_theta < 0.0f) ? -inv_sin_theta : inv_sin_theta;
-
- // Other precalculations
- PW = m_pVolumeGeometry->getPixelLengthX();
- PH = m_pVolumeGeometry->getPixelLengthY();
- DW = m_pProjectionGeometry->getDetectorWidth();
- inv_PW = 1.0f / PW;
- inv_PH = 1.0f / PH;
-
- // [-45?,45?] and [135?,225?]
- if (theta < PIdiv4) {
-
- // Precalculate kernel limits
- S = -0.5f * fabs_sin_theta * fabs_inv_cos_theta;
- T = -S;
- U = 1.0f + S;
- V = 1.0f - S;
- inv_4T = 0.25f / T;
-
- updateX = sin_theta * inv_cos_theta;
-
- // loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) continue;
-
- // get t
- t = m_pProjectionGeometry->indexToDetectorOffset(iDetector);
- if (switch_t) t = -t;
-
- // calculate left strip extremes (volume coordinates)
- PL = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0) - DW*0.5f) * inv_cos_theta;
- PLimitL = PL - 0.5f * fabs_sin_theta * fabs_inv_cos_theta * PH;
- PLimitR = PLimitL + DW * inv_cos_theta + PH * fabs_sin_theta * fabs_inv_cos_theta;
-
- // calculate strip extremes (pixel coordinates)
- XLimitL = (PLimitL - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- XLimitR = (PLimitR - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- xL = (PL - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- xR = xL + (DW * inv_cos_theta) * inv_PW;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get strip extremes in column indices
- x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f);
- x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f);
-
- // get coords w.r.t leftmost column hit by strip
- x2L = xL - x1L;
- x2R = xR - x1L;
-
- // update strip extremes for the next row
- XLimitL += updateX;
- XLimitR += updateX;
- xL += updateX;
- xR += updateX;
-
- // for each affected col
- for (col = x1L; col <= x1R; ++col) {
-
- if (col < 0 || col >= m_pVolumeGeometry->getGridColCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col);
-
- // POLICY: PIXEL PRIOR
- if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // right
- if (x2R >= V) res = 1.0f;
- else if (x2R > U) res = x2R - (x2R-U)*(x2R-U)*inv_4T;
- else if (x2R >= T) res = x2R;
- else if (x2R > S) res = (x2R-S)*(x2R-S) * inv_4T;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // left
- if (x2L <= S) {} // - 0.0f
- else if (x2L < T) res -= (x2L-S)*(x2L-S) * inv_4T;
- else if (x2L <= U) res -= x2L;
- else if (x2L < V) res -= x2L - (x2L-U)*(x2L-U)*inv_4T;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // POLICY: ADD
- p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res);
-
- // POLICY: PIXEL POSTERIOR
- p.pixelPosterior(iVolumeIndex);
-
- x2L -= 1.0f;
- x2R -= 1.0f;
-
- } // end col loop
-
- } // end row loop
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end detector loop
-
- // [45?,135?] and [225?,315?]
- // horizontaly
- } else {
-
- // Precalculate kernel limits
- S = -0.5f * fabs_cos_theta * fabs_inv_sin_theta;
- T = -S;
- U = 1.0f + S;
- V = 1.0f - S;
- inv_4T = 0.25f / T;
-
- updateX = cos_theta * inv_sin_theta;
-
- // loop detectors
- for (iDetector = 0; iDetector < m_pProjectionGeometry->getDetectorCount(); ++iDetector) {
-
- iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) continue;
-
- // get t
- t = m_pProjectionGeometry->indexToDetectorOffset(iDetector);
- if (switch_t) t = -t;
-
- // calculate left strip extremes (volume coordinates)
- PL = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0) + DW*0.5f) * inv_sin_theta;
- PLimitL = PL + 0.5f * fabs_cos_theta * fabs_inv_sin_theta * PW;
- PLimitR = PLimitL - DW * inv_sin_theta - PH * fabs_cos_theta * fabs_inv_sin_theta;
-
- // calculate strip extremes (pixel coordinates)
- XLimitL = (m_pVolumeGeometry->getWindowMaxY() - PLimitL) * inv_PH;
- XLimitR = (m_pVolumeGeometry->getWindowMaxY() - PLimitR) * inv_PH;
- xL = (m_pVolumeGeometry->getWindowMaxY() - PL) * inv_PH;
- xR = xL + (DW * fabs_inv_sin_theta) * inv_PH;
-
- // for each col
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get strip extremes in column indices
- x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f);
- x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f);
-
- // get coords w.r.t leftmost column hit by strip
- x2L = xL - x1L;
- x2R = xR - x1L;
-
- // update strip extremes for the next row
- XLimitL += updateX;
- XLimitR += updateX;
- xL += updateX;
- xR += updateX;
-
- // for each affected col
- for (row = x1L; row <= x1R; ++row) {
-
- if (row < 0 || row >= m_pVolumeGeometry->getGridRowCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col);
-
- // POLICY: PIXEL PRIOR
- if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // right
- if (x2R >= V) res = 1.0f;
- else if (x2R > U) res = x2R - (x2R-U)*(x2R-U)*inv_4T;
- else if (x2R >= T) res = x2R;
- else if (x2R > S) res = (x2R-S)*(x2R-S) * inv_4T;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // left
- if (x2L <= S) {} // - 0.0f
- else if (x2L < T) res -= (x2L-S)*(x2L-S) * inv_4T;
- else if (x2L <= U) res -= x2L;
- else if (x2L < V) res -= x2L - (x2L-U)*(x2L-U)*inv_4T;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // POLICY: ADD
- p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res);
-
- // POLICY: PIXEL POSTERIOR
- p.pixelPosterior(iVolumeIndex);
-
- x2L -= 1.0f;
- x2R -= 1.0f;
-
- } // end row loop
-
- } // end col loop
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
- } // end detector loop
-
- } // end theta switch
-}
-
-
-//----------------------------------------------------------------------------------------
-// PROJECT SINGLE RAY
-template <typename Policy>
-void CParallelBeamStripKernelProjector2D::projectSingleRay(int _iProjection, int _iDetector, Policy& p)
-{
- int iRayIndex = _iProjection * m_pProjectionGeometry->getDetectorCount() + _iDetector;
-
- // POLICY: RAY PRIOR
- if (!p.rayPrior(iRayIndex)) return;
-
- // Some variables
- float32 theta, t;
- int row, col;
- float32 res;
- float32 PL, PLimitL, PLimitR;
- float32 xL, xR, XLimitL, XLimitR;
- int x1L,x1R;
- float32 x2L, x2R, updateX;
- int iVolumeIndex;
-
- float32 sin_theta, cos_theta, inv_sin_theta, inv_cos_theta;
- float32 fabs_sin_theta, fabs_cos_theta, fabs_inv_sin_theta, fabs_inv_cos_theta;
- float32 PW, PH, DW, inv_PW, inv_PH;
- float32 S, T, U, V, inv_4T;
-
- // get values
- theta = m_pProjectionGeometry->getProjectionAngle(_iProjection);
- bool switch_t = false;
- if (theta >= 7*PIdiv4) theta -= 2*PI;
- if (theta >= 3*PIdiv4) {
- theta -= PI;
- switch_t = true;
- }
-
- // Precalculate sin, cos, 1/cos
- sin_theta = sin(theta);
- cos_theta = cos(theta);
- inv_cos_theta = 1.0f / cos_theta;
- inv_sin_theta = 1.0f / sin_theta;
-
- fabs_sin_theta = (sin_theta < 0.0f) ? -sin_theta : sin_theta;
- fabs_cos_theta = (cos_theta < 0.0f) ? -cos_theta : cos_theta;
- fabs_inv_cos_theta = (inv_cos_theta < 0.0f) ? -inv_cos_theta : inv_cos_theta;
- fabs_inv_sin_theta = (inv_sin_theta < 0.0f) ? -inv_sin_theta : inv_sin_theta;
-
- // Other precalculations
- PW = m_pVolumeGeometry->getPixelLengthX();
- PH = m_pVolumeGeometry->getPixelLengthY();
- DW = m_pProjectionGeometry->getDetectorWidth();
- inv_PW = 1.0f / PW;
- inv_PH = 1.0f / PH;
-
- // [-45?,45?] and [135?,225?]
- if (theta < PIdiv4) {
-
- // Precalculate kernel limits
- S = -0.5f * fabs_sin_theta * fabs_inv_cos_theta;
- T = -S;
- U = 1.0f + S;
- V = 1.0f - S;
- inv_4T = 0.25f / T;
-
- updateX = sin_theta * inv_cos_theta;
-
- // get t
- t = m_pProjectionGeometry->indexToDetectorOffset(_iDetector);
- if (switch_t) t = -t;
-
- // calculate left strip extremes (volume coordinates)
- PL = (t - sin_theta * m_pVolumeGeometry->pixelRowToCenterY(0) - DW*0.5f) * inv_cos_theta;
- PLimitL = PL - 0.5f * fabs_sin_theta * fabs_inv_cos_theta * PH;
- PLimitR = PLimitL + DW * inv_cos_theta + PH * fabs_sin_theta * fabs_inv_cos_theta;
-
- // calculate strip extremes (pixel coordinates)
- XLimitL = (PLimitL - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- XLimitR = (PLimitR - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- xL = (PL - m_pVolumeGeometry->getWindowMinX()) * inv_PW;
- xR = xL + (DW * inv_cos_theta) * inv_PW;
-
- // for each row
- for (row = 0; row < m_pVolumeGeometry->getGridRowCount(); ++row) {
-
- // get strip extremes in column indices
- x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f);
- x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f);
-
- // get coords w.r.t leftmost column hit by strip
- x2L = xL - x1L;
- x2R = xR - x1L;
-
- // update strip extremes for the next row
- XLimitL += updateX;
- XLimitR += updateX;
- xL += updateX;
- xR += updateX;
-
- // for each affected col
- for (col = x1L; col <= x1R; ++col) {
-
- if (col < 0 || col >= m_pVolumeGeometry->getGridColCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col);
-
- // POLICY: PIXEL PRIOR
- if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // right
- if (x2R >= V) res = 1.0f;
- else if (x2R > U) res = x2R - (x2R-U)*(x2R-U)*inv_4T;
- else if (x2R >= T) res = x2R;
- else if (x2R > S) res = (x2R-S)*(x2R-S) * inv_4T;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // left
- if (x2L <= S) {} // - 0.0f
- else if (x2L < T) res -= (x2L-S)*(x2L-S) * inv_4T;
- else if (x2L <= U) res -= x2L;
- else if (x2L < V) res -= x2L - (x2L-U)*(x2L-U)*inv_4T;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // POLICY: ADD
- p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res);
-
- // POLICY: PIXEL POSTERIOR
- p.pixelPosterior(iVolumeIndex);
-
- x2L -= 1.0f;
- x2R -= 1.0f;
-
- } // end col loop
-
- } // end row loop
-
- // [45?,135?] and [225?,315?]
- // horizontaly
- } else {
-
- // Precalculate kernel limits
- S = -0.5f * fabs_cos_theta * fabs_inv_sin_theta;
- T = -S;
- U = 1.0f + S;
- V = 1.0f - S;
- inv_4T = 0.25f / T;
-
- updateX = cos_theta * inv_sin_theta;
-
- // get t
- t = m_pProjectionGeometry->indexToDetectorOffset(_iDetector);
- if (switch_t) t = -t;
-
- // calculate left strip extremes (volume coordinates)
- PL = (t - cos_theta * m_pVolumeGeometry->pixelColToCenterX(0) + DW*0.5f) * inv_sin_theta;
- PLimitL = PL + 0.5f * fabs_cos_theta * fabs_inv_sin_theta * PW;
- PLimitR = PLimitL - DW * inv_sin_theta - PH * fabs_cos_theta * fabs_inv_sin_theta;
-
- // calculate strip extremes (pixel coordinates)
- XLimitL = (m_pVolumeGeometry->getWindowMaxY() - PLimitL) * inv_PH;
- XLimitR = (m_pVolumeGeometry->getWindowMaxY() - PLimitR) * inv_PH;
- xL = (m_pVolumeGeometry->getWindowMaxY() - PL) * inv_PH;
- xR = xL + (DW * fabs_inv_sin_theta) * inv_PH;
-
- // for each col
- for (col = 0; col < m_pVolumeGeometry->getGridColCount(); ++col) {
-
- // get strip extremes in column indices
- x1L = int((XLimitL > 0.0f) ? XLimitL : XLimitL-1.0f);
- x1R = int((XLimitR > 0.0f) ? XLimitR : XLimitR-1.0f);
-
- // get coords w.r.t leftmost column hit by strip
- x2L = xL - x1L;
- x2R = xR - x1L;
-
- // update strip extremes for the next row
- XLimitL += updateX;
- XLimitR += updateX;
- xL += updateX;
- xR += updateX;
-
- // for each affected col
- for (row = x1L; row <= x1R; ++row) {
-
- if (row < 0 || row >= m_pVolumeGeometry->getGridRowCount()) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- iVolumeIndex = m_pVolumeGeometry->pixelRowColToIndex(row, col);
-
- // POLICY: PIXEL PRIOR
- if (!p.pixelPrior(iVolumeIndex)) { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // right
- if (x2R >= V) res = 1.0f;
- else if (x2R > U) res = x2R - (x2R-U)*(x2R-U)*inv_4T;
- else if (x2R >= T) res = x2R;
- else if (x2R > S) res = (x2R-S)*(x2R-S) * inv_4T;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // left
- if (x2L <= S) {} // - 0.0f
- else if (x2L < T) res -= (x2L-S)*(x2L-S) * inv_4T;
- else if (x2L <= U) res -= x2L;
- else if (x2L < V) res -= x2L - (x2L-U)*(x2L-U)*inv_4T;
- else { x2L -= 1.0f; x2R -= 1.0f; continue; }
-
- // POLICY: ADD
- p.addWeight(iRayIndex, iVolumeIndex, PW*PH * res);
-
- // POLICY: PIXEL POSTERIOR
- p.pixelPosterior(iVolumeIndex);
-
- x2L -= 1.0f;
- x2R -= 1.0f;
-
- } // end row loop
-
- } // end col loop
-
- } // end theta switch
-
- // POLICY: RAY POSTERIOR
- p.rayPosterior(iRayIndex);
-
-}
--
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