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function astra_geom_visualize(proj_geom, vol_geom)
if strcmp(proj_geom.type,'parallel') || strcmp(proj_geom.type,'fanflat') ||strcmp(proj_geom.type,'parallel3d') || strcmp(proj_geom.type,'cone')
proj_geom = astra_geom_2vec(proj_geom);
end
% open window
f = figure('Visible','off');
hold on
% display projection 1
displayProjection(1);
% label
txt = uicontrol('Style','text', 'Position',[10 10 70 20], 'String','Projection');
% slider
anglecount = size(proj_geom.Vectors,1);
sld = uicontrol('Style', 'slider', ...
'Min', 1, 'Max', anglecount, 'SliderStep', [1 1]/anglecount, 'Value', 1, ...
'Position', [80 10 200 20], ...
'Callback', @updateProjection);
f.Visible = 'on';
function updateProjection(source, callbackdata)
displayProjection(floor(source.Value));
end
function displayProjection(a)
colours = get(gca,'ColorOrder');
% set title
title(['projection ' num2str(a)]);
if strcmp(proj_geom.type,'parallel_vec')
v = proj_geom.Vectors;
d = proj_geom.DetectorCount;
if ~isfield(vol_geom, 'option')
minx = -vol_geom.GridRowCount/2;
miny = -vol_geom.GridColCount/2;
minz = -vol_geom.GridSliceCount/2;
maxx = vol_geom.GridRowCount/2;
else
minx = vol_geom.option.WindowMinX;
miny = vol_geom.option.WindowMinY;
maxx = vol_geom.option.WindowMaxX;
maxy = vol_geom.option.WindowMaxY;
end
% axis
cla
axis([minx maxx miny maxy]*2.25)
axis square
% volume
plot([minx minx maxx maxx minx], [miny maxy maxy miny miny], 'LineWidth', 1, 'Color', colours(1,:))
% ray
s = maxx - minx;
plot([0 v(a,1)]*s*0.33, [0 v(a,2)]*s*0.33, 'LineWidth', 2, 'Color', colours(3,:))
% detector
s2 = s*0.75;
plot([-d/2 d/2]*v(a,5) + v(a,3) + s2*v(a,1), [-d/2 d/2]*v(a,6) + v(a,4) + s2*v(a,2), 'LineWidth', 2, 'Color', colours(5,:))
elseif strcmp(proj_geom.type,'fanflat_vec')
v = proj_geom.Vectors;
d = proj_geom.DetectorCount;
if ~isfield(vol_geom, 'option')
minx = -vol_geom.GridRowCount/2;
miny = -vol_geom.GridColCount/2;
minz = -vol_geom.GridSliceCount/2;
maxx = vol_geom.GridRowCount/2;
else
minx = vol_geom.option.WindowMinX;
miny = vol_geom.option.WindowMinY;
maxx = vol_geom.option.WindowMaxX;
maxy = vol_geom.option.WindowMaxY;
end
% axis
cla
axis([minx maxx miny maxy]*2.25)
axis square
% volume
plot([minx minx maxx maxx minx], [miny maxy maxy miny miny], 'LineWidth', 1, 'Color', colours(1,:))
% detector
D1 = v(a,3:4) - d/2*v(a,5:6);
D2 = v(a,3:4) + d/2*v(a,5:6);
plot([D1(1) D2(1)], [D1(2) D2(2)], 'LineWidth', 2, 'Color', colours(5,:))
% beam
plot([v(a,1) D1(1)], [v(a,2) D1(2)], 'LineWidth', 1, 'Color', colours(3,:))
plot([v(a,1) D2(1)], [v(a,2) D2(2)], 'LineWidth', 1, 'Color', colours(3,:))
elseif strcmp(proj_geom.type,'parallel3d_vec')
v = proj_geom.Vectors;
d1 = proj_geom.DetectorRowCount;
d2 = proj_geom.DetectorColCount;
if ~isfield(vol_geom, 'option')
minx = -vol_geom.GridRowCount/2;
miny = -vol_geom.GridColCount/2;
minz = -vol_geom.GridSliceCount/2;
maxx = vol_geom.GridRowCount/2;
maxy = vol_geom.GridColCount/2;
maxz = vol_geom.GridSliceCount/2;
else
minx = vol_geom.option.WindowMinX;
miny = vol_geom.option.WindowMinY;
minz = vol_geom.option.WindowMinZ;
maxx = vol_geom.option.WindowMaxX;
maxy = vol_geom.option.WindowMaxY;
maxz = vol_geom.option.WindowMaxZ;
end
% axis
windowminx = min(v(:,4));
windowminy = min(v(:,5));
windowminz = max(v(:,6));
windowmaxx = max(v(:,4));
windowmaxy = max(v(:,5));
windowmaxz = max(v(:,6));
cla
axis([minx maxx miny maxy minz maxz]*5.10)
% volume
plot3([minx minx maxx maxx minx], [miny maxy maxy miny miny], [minz minz minz minz minz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([minx minx maxx maxx minx], [miny maxy maxy miny miny], [maxz maxz maxz maxz maxz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([minx minx], [miny miny], [minz maxz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([maxx maxx], [miny miny], [minz maxz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([minx minx], [maxy maxy], [minz maxz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([maxx maxx], [maxy maxy], [minz maxz], 'LineWidth', 1, 'Color', colours(1,:))
% detector
D1 = v(a,4:6) - d1/2*v(a,7:9) - d2/2*v(a,10:12);
D2 = v(a,4:6) + d1/2*v(a,7:9) - d2/2*v(a,10:12);
D3 = v(a,4:6) + d1/2*v(a,7:9) + d2/2*v(a,10:12);
D4 = v(a,4:6) - d1/2*v(a,7:9) + d2/2*v(a,10:12);
plot3([D1(1) D2(1) D3(1) D4(1) D1(1)], [D1(2) D2(2) D3(2) D4(2) D1(2)], [D1(3) D2(3) D3(3) D4(3) D1(3)], 'LineWidth', 2, 'Color', colours(5,:))
% ray
s = maxx - minx;
plot3([0 v(a,1)]*s*0.30, [0 v(a,2)]*s*0.30, [0 v(a,3)]*s*0.30, 'LineWidth', 2, 'Color', colours(3,:))
elseif strcmp(proj_geom.type,'cone_vec')
v = proj_geom.Vectors;
d1 = proj_geom.DetectorRowCount;
d2 = proj_geom.DetectorColCount;
if ~isfield(vol_geom, 'option')
minx = -vol_geom.GridRowCount/2;
miny = -vol_geom.GridColCount/2;
minz = -vol_geom.GridSliceCount/2;
maxx = vol_geom.GridRowCount/2;
maxy = vol_geom.GridColCount/2;
maxz = vol_geom.GridSliceCount/2;
else
minx = vol_geom.option.WindowMinX;
miny = vol_geom.option.WindowMinY;
minz = vol_geom.option.WindowMinZ;
maxx = vol_geom.option.WindowMaxX;
maxy = vol_geom.option.WindowMaxY;
maxz = vol_geom.option.WindowMaxZ;
end
% axis
windowminx = min(v(:,4));
windowminy = min(v(:,5));
windowminz = max(v(:,6));
windowmaxx = max(v(:,4));
windowmaxy = max(v(:,5));
windowmaxz = max(v(:,6));
cla
axis([minx maxx miny maxy minz maxz]*5.10)
% volume
plot3([minx minx maxx maxx minx], [miny maxy maxy miny miny], [minz minz minz minz minz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([minx minx maxx maxx minx], [miny maxy maxy miny miny], [maxz maxz maxz maxz maxz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([minx minx], [miny miny], [minz maxz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([maxx maxx], [miny miny], [minz maxz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([minx minx], [maxy maxy], [minz maxz], 'LineWidth', 1, 'Color', colours(1,:))
plot3([maxx maxx], [maxy maxy], [minz maxz], 'LineWidth', 1, 'Color', colours(1,:))
% detector
D1 = v(a,4:6) - d1/2*v(a,7:9) - d2/2*v(a,10:12);
D2 = v(a,4:6) + d1/2*v(a,7:9) - d2/2*v(a,10:12);
D3 = v(a,4:6) + d1/2*v(a,7:9) + d2/2*v(a,10:12);
D4 = v(a,4:6) - d1/2*v(a,7:9) + d2/2*v(a,10:12);
plot3([D1(1) D2(1) D3(1) D4(1) D1(1)], [D1(2) D2(2) D3(2) D4(2) D1(2)], [D1(3) D2(3) D3(3) D4(3) D1(3)], 'LineWidth', 2, 'Color', colours(5,:))
% beam
plot3([v(a,1) D1(1)], [v(a,2) D1(2)], [v(a,3) D1(3)], 'LineWidth', 1, 'Color', colours(3,:))
plot3([v(a,1) D2(1)], [v(a,2) D2(2)], [v(a,3) D2(3)], 'LineWidth', 1, 'Color', colours(3,:))
plot3([v(a,1) D3(1)], [v(a,2) D3(2)], [v(a,3) D3(3)], 'LineWidth', 1, 'Color', colours(3,:))
plot3([v(a,1) D4(1)], [v(a,2) D4(2)], [v(a,3) D4(3)], 'LineWidth', 1, 'Color', colours(3,:))
else
error('invalid projector type')
end
end
end
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