Fourier Transforms¶

processing_library.fourier_transforms Package¶

FFT support functions

`extract_mid`(a, npixel)	Extract a section from middle of a map
`extract_oversampled`(a, xf, yf, …)	Extract the (xf-th,yf-th) w-kernel from the oversampled parent
`fft`(a)	Fourier transformation from image to grid space
`ifft`(a)	Fourier transformation from grid to image space
`pad_mid`(ff, npixel)	Pad a far field image with zeroes to make it the given size.
`visibility_recentre`(uvw, dl, dm)	Compensate for kernel re-centering - see w_kernel_function.
`w_beam`(npixel, field_of_view, w[, cx, cy, …])	W beam, the fresnel diffraction pattern arising from non-coplanar baselines
`weight_gridding`(shape, visweights, vuvwmap, …)	Reweight data using one of a number of algorithms