D23 Posted October 6, 2019 Share Posted October 6, 2019 I tend to specialize in restoring vintage photos & Affinity Photo is excellent for that. Sometimes the only image I can get is photocopied so that when I scan it the result shows halftone dots & suffers from the Moire effect. Affinity's FFT Denoise filter usually takes care of that but I don't really understand how to use it properly. In the dialog box there are various settings available to do with brush size/hardness/flow/opacity etc but I'd like to know more on how to use these & which points to click on (or not). I saw one of Affinity's video tutorials which shows it in operation (and a few posts in the forum) but it doesn't explain how different settings affect the result. Are there any other guides to using this very useful tool? Quote Link to comment Share on other sites More sharing options...
John Rostron Posted October 6, 2019 Share Posted October 6, 2019 It is very much a case of suck it and see. The highlighted spots in the FFT diagram denote frequencies characteristic of regular noise. You could take a gradual approach by erasing the brightest quartet of spots first, then see how that looks; then the next brightest quartet and so on. John Quote Windows 10, Affinity Photo 1.10.5 Designer 1.10.5 and Publisher 1.10.5 (mainly Photo), now ex-Adobe CC CPU: AMD A6-3670. RAM: 16 GB DDR3 @ 666MHz, Graphics: 2047MB NVIDIA GeForce GT 630 Link to comment Share on other sites More sharing options...
D23 Posted October 7, 2019 Author Share Posted October 7, 2019 OK, thanks. I asked because I like to have a rough idea of what's going on. Quote Link to comment Share on other sites More sharing options...
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