rcatool.stats.convolve.fft_prep

rcatool.stats.convolve.fft_prep(array, kernel, fill_value, boundary='fill', psf_pad=False, fft_pad=True)

Prepare data array and kernel for fft computation.

Parameters:

• boundary ({'fill', 'wrap'}, optional) –

  A flag indicating how to handle boundaries:

  • ’fill’: set values outside the array boundary to fill_value (default)

  • ’wrap’: periodic boundary

• fft_pad (bool, optional) – Default on. Zero-pad image to the nearest 2^n

• psf_pad (bool, optional) – Default off. Zero-pad image to be at least the sum of the image sizes (in order to avoid edge-wrapping when smoothing)