Here are a few resources for periodic pattern removal (e.g. in halftone print images) by zeroing out parts of the image in the Fourier domain. Maybe that was wh

Here are a few resources for periodic pattern removal (e.g. in halftone print images) by zeroing out parts of the image in the Fourier domain. Maybe that was what you had in mind? http://matzjb.se/2015/08/08/smoothing-a-halftone-photo-using-fft/ http://matzjb.se/2015/08/08/smoothing-a-halftone-photo-using... http://scipy-lectures.org/intro/scipy/auto_examples/solutions/plot_fft_image_denoise.html http://scipy-lectures.org/intro/scipy/auto_examples/solution... https://developer.apple.com/documentation/accelerate/halftone_descreening_with_2d_fast_fourier_transform https://developer.apple.com/documentation/accelerate/halfton... https://stackoverflow.com/questions/29235421/find-proper-notch-filter-to-remove-pattern-from-image https://stackoverflow.com/questions/29235421/find-proper-not... https://stackoverflow.com/questions/34027840/removing-periodic-noise-from-an-image-using-the-fourier-transform https://stackoverflow.com/questions/34027840/removing-period... https://www.youtube.com/watch?v=yyox358zIRw https://www.youtube.com/watch?v=yyox358zIRw