A chapter on filters

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!

http://www.bioss.ac.uk/people/chris/ch3.pdf

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