tomopy.sim.propagate
¶
Module for simulation of x-rays.
Functions:
propagate_tie (mu, delta, pixel_size, dist) |
Propagate emitting x-ray wave based on Transport of Intensity. |
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tomopy.sim.propagate.
calc_intensity
(probe, proj, shift_x=None, shift_y=None, mode='near')[source]¶ Calculate far field intensity.
Parameters: - probe (ndarray) – Rectangular x-ray source kernel.
- proj (ndarray) – Object plane intensity image.
- shift_x, shift_y (int, optional) – Shift amount of probe along x and y axes.
- mode (str, optional) – Specify the regime. ‘near’ or ‘far’
Returns: ndarray – Individual raster scanned far field images as 3D array.
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tomopy.sim.propagate.
propagate_tie
(mu, delta, pixel_size, dist)[source]¶ Propagate emitting x-ray wave based on Transport of Intensity.
Parameters: - mu (ndarray, optional) – 3D tomographic data for attenuation.
- delta (ndarray) – 3D tomographic data for refractive index.
- pixel_size (float) – Detector pixel size in cm.
- dist (float) – Propagation distance of the wavefront in cm.
Returns: ndarray – 3D propagated tomographic intensity.
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tomopy.sim.propagate.
probe_gauss
(nx, ny, fwhm=None, center=None, max_int=1)[source]¶ Simulate incident x-ray beam (probe) as a square Gaussian kernel.
Parameters: - nx, ny (int) – Grid size along x and y axes.
- fwhm (float, optional) – Effective radius of the source.
- center (array_like, optional) – x and y coordinates of the center of the gaussian function.
- max_int (int) – Maximum x-ray intensity.
Returns: ndarray – 2D source intensity distribution.