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Implement projection shifts.

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Jostein Bø Fløystad
2013-07-05 13:14:38 +02:00
parent 8e6468eef5
commit 1e1dd180d2
2 changed files with 13 additions and 7 deletions
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skimage/transform/_radon_transform.pyx
+4 -5
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@@ -157,14 +157,13 @@ cpdef bilinear_ray_update(cnp.ndarray[cnp.double_t, ndim=2] image,
def sart_projection_update(cnp.ndarray[cnp.double_t, ndim=2] image, \
double theta, \
cnp.ndarray[cnp.double_t, ndim=1] projection):
cnp.ndarray[cnp.double_t, ndim=1] projection,
double projection_shift=0.):
cdef cnp.ndarray[cnp.double_t, ndim=2] image_update = np.zeros_like(image)
cdef unsigned int ray_position
cdef double ray_position
cdef Py_ssize_t i
for i in range(projection.shape[0]):
# TODO:
# ip may differ from i in the future (for alignment of projections)
ray_position = i
ray_position = i + projection_shift
bilinear_ray_update(image, image_update, theta, ray_position,
projection[i])
return image_update