I do Fourier Transform for an image, then consider line(slice) in FFT image. When that slice isn't parallel neither x- not y-axis, coordinates are not integer.
E.g. slice can hold indices {(0,0), (0.25,1), (0.5,2), (0.75,3), (1,4)...}
.
When using nearest-interpolation, quality of whatever I do is pure.
What techniques can you suggest to improve interpolation in Fourier grid?
(0.75, 3)
use value at(1,3)
, and then perform inverse transform, reconstruction is not perfect. $\endgroup$