diff options
Diffstat (limited to 'python/astra/operator.py')
| -rw-r--r-- | python/astra/operator.py | 33 |
1 files changed, 11 insertions, 22 deletions
diff --git a/python/astra/operator.py b/python/astra/operator.py index a3abd5a..0c37353 100644 --- a/python/astra/operator.py +++ b/python/astra/operator.py @@ -91,7 +91,7 @@ class OpTomo(scipy.sparse.linalg.LinearOperator): arr = np.ascontiguousarray(arr) return arr - def matvec(self,v): + def _matvec(self,v): """Implements the forward operator. :param v: Volume to forward project. @@ -135,24 +135,16 @@ class OpTomo(scipy.sparse.linalg.LinearOperator): self.data_mod.delete([vid,sid]) return v.flatten() - def matmat(self,m): - """Implements the forward operator with a matrix. - - :param m: Volumes to forward project, arranged in columns. - :type m: :class:`numpy.ndarray` - """ - out = np.zeros((self.ssize,m.shape[1]),dtype=np.float32) - for i in range(m.shape[1]): - out[:,i] = self.matvec(m[:,i].flatten()) - return out - def __mul__(self,v): """Provides easy forward operator by *. :param v: Volume to forward project. :type v: :class:`numpy.ndarray` """ - return self.matvec(v) + # Catch the case of a forward projection of a 2D/3D image + if isinstance(v, np.ndarray) and v.shape==self.vshape: + return self._matvec(v) + return scipy.sparse.linalg.LinearOperator.__mul__(self, v) def reconstruct(self, method, s, iterations=1, extraOptions = {}): """Reconstruct an object. @@ -192,17 +184,14 @@ class OpTomoTranspose(scipy.sparse.linalg.LinearOperator): self.dtype = np.float32 self.shape = (parent.shape[1], parent.shape[0]) - def matvec(self, s): + def _matvec(self, s): return self.parent.rmatvec(s) def rmatvec(self, v): return self.parent.matvec(v) - def matmat(self, m): - out = np.zeros((self.vsize,m.shape[1]),dtype=np.float32) - for i in range(m.shape[1]): - out[:,i] = self.matvec(m[:,i].flatten()) - return out - - def __mul__(self,v): - return self.matvec(v) + def __mul__(self,s): + # Catch the case of a backprojection of 2D/3D data + if isinstance(s, np.ndarray) and s.shape==self.parent.sshape: + return self._matvec(s) + return scipy.sparse.linalg.LinearOperator.__mul__(self, s) |