I thought I’d make a quick note to recommend a chapter available online detailing some basics of smoothing/’enhancement’ filters, denoising and a very good introduction to the fourier transform from the perspective of images. I particularly like the basic example using the 4×4 array at the start of the section (page 15), which certainly clarified some confusion I was having about interpreting the transforms! While the content is medical in nature, and perhaps the section on the wiener filter doesn’t apply to geoscience (though maybe for segmentation?) I still really enjoyed reading this nonetheless and will be using it again!
A chapter on filters