pynrc.maths.image_manip.shift_subtract

pynrc.maths.image_manip.shift_subtract(params, reference, target, mask=None, pad=False, interp='cubic', shift_function=<function fshift>)[source]

Shift and subtract image

Subpixel shifts for input into least-square optimizer.

Parameters

  • params (tuple) – xshift, yshift, beta

  • reference (ndarray) – See align_fourierLSQ

  • target (ndarray) – See align_fourierLSQ

  • mask (ndarray, optional) – See align_fourierLSQ

  • pad (bool) – Should we pad the array before shifting, then truncate? Otherwise, the image is wrapped.

  • interp (str) – Interpolation for fshift function. Default is ‘cubic’. Options are ‘linear’, ‘cubic’, or ‘quintic’.

  • shift_function (func) – which function to use for sub-pixel shifting

Returns

ndarray – 1D array of target-reference residual after applying shift and intensity fraction.