prysm.degredations#

Degredations in the image chain.

prysm.degredations.smear_ft(fx, fy, width, height)#

Analytic Fourier Transform (OTF) of smear.

Parameters:

  • fx (numpy.ndarray) – X spatial frequencies, units of reciprocal width

  • fy (numpy.ndarray) – Y spatial frequencies, units of reciprocal width

  • width (float) – width of the smear, units of length (e.g. um)

  • height (float) – height of the smear, units of length (e.g. um)

Returns:

transfer function of the smear

Return type:

numpy.ndarray

prysm.degredations.jitter_ft(fr, scale)#

Analytic Fourier transform (OTF) of jitter.

Parameters:

  • fr (numpy.ndarray) – radial spatial frequency, units of reciprocal length, e.g. cy/mm

  • scale (float) – scale of the jitter, in same units as “dx” e.g., if fr has units cy/mm, then scale has units mm

Returns:

transfer function of the jitter

Return type:

numpy.ndarray