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| -rw-r--r-- | python/astra/experimental.pyx | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/python/astra/experimental.pyx b/python/astra/experimental.pyx index 8f8e47d..25ecb24 100644 --- a/python/astra/experimental.pyx +++ b/python/astra/experimental.pyx @@ -121,3 +121,57 @@ IF HAVE_CUDA==True: cdef CProjector3D * projector = manProj.get(projector_id) # may be NULL if not m.doFDK(projector, pVolObject, pProjObject, False, NULL, MODE_ADD): raise Exception("Failed to perform FDK") + + cimport utils + from .utils cimport linkVolFromGeometry, linkProjFromGeometry + + def direct_FPBP3D(projector_id, vol, proj, t): + cdef CProjector3D * projector = manProj.get(projector_id) + if projector == NULL: + raise Exception("Projector not found") + cdef CVolumeGeometry3D *pGeometry = projector.getVolumeGeometry() + cdef CProjectionGeometry3D *ppGeometry = projector.getProjectionGeometry() + cdef CFloat32VolumeData3D * pVol = linkVolFromGeometry(pGeometry, vol) + cdef CFloat32ProjectionData3D * pProj = linkProjFromGeometry(ppGeometry, proj) + cdef vector[CFloat32VolumeData3D *] vols + cdef vector[CFloat32ProjectionData3D *] projs + vols.push_back(pVol) + projs.push_back(pProj) + cdef CCompositeGeometryManager m + try: + if t == "FP": + if not m.doFP(projector, vols, projs, MODE_SET): + raise Exception("Failed to perform FP") + elif t == "BP": + if not m.doBP(projector, vols, projs, MODE_SET): + raise Exception("Failed to perform BP") + else: + raise RuntimeError("internal error: wrong op type") + finally: + del pVol + del pProj + + def direct_FP3D(projector_id, vol, proj): + """Perform a 3D forward projection with pre-allocated input/output. + + :param projector_id: A 3D projector object handle + :type datatype: :class:`int` + :param vol: The input data, as either a numpy array, or a GPULink object + :type datatype: :class:`numpy.ndarray` or :class:`astra.data3d.GPULink` + :param proj: The pre-allocated output data, either numpy array or GPULink + :type datatype: :class:`numpy.ndarray` or :class:`astra.data3d.GPULink` + """ + direct_FPBP3D(projector_id, vol, proj, "FP") + + def direct_BP3D(projector_id, vol, proj): + """Perform a 3D back projection with pre-allocated input/output. + + :param projector_id: A 3D projector object handle + :type datatype: :class:`int` + :param vol: The input data, as either a numpy array, or a GPULink object + :type datatype: :class:`numpy.ndarray` or :class:`astra.data3d.GPULink` + :param proj: The pre-allocated output data, either numpy array or GPULink + :type datatype: :class:`numpy.ndarray` or :class:`astra.data3d.GPULink` + """ + direct_FPBP3D(projector_id, vol, proj, "BP") + |