sinofilter: Sinogram filtering.

Module for sinogram filtering on CPU/GPU.

class SinoFilter(sino_shape, filter_name=None, ctx=None, devicetype='all', platformid=None, deviceid=None, profile=False, extra_options=None)

Bases: OpenclProcessing

A class for performing sinogram filtering on GPU using OpenCL.

This is a convolution in the Fourier space, along one dimension:

• In 2D: (n_a, d_x): n_a filterings (1D FFT of size d_x)

• In 3D: (n_z, n_a, d_x): n_z*n_a filterings (1D FFT of size d_x)

set_filter(h_filt, normalize=True)

Set a filter for sinogram filtering.

Parameters:

• h_filt – Filter. Each line of the sinogram will be filtered with this filter. It has to be the Real-to-Complex Fourier Transform of some real filter, padded to 2*sinogram_width.

• normalize – Whether to normalize the filter with pi/num_angles.

copy2d(dst, src, transfer_shape, dst_offset=(0, 0), src_offset=(0, 0))

Parameters:

• dst

• src

• transfer_shape

• dst_offset

• src_offset

copy2d_host(dst, src, transfer_shape, dst_offset=(0, 0), src_offset=(0, 0))

Parameters:

• dst

• src

• transfer_shape

• dst_offset

• src_offset

filter_sino(sino, output=None)

Parameters:

• sino – sinogram

• output

Returns:

filtered sinogram