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<blockquote data-quote="pforsell" data-source="post: 514174" data-attributes="member: 7240"><p>While deconvolution sharpening has solid mathematical foundation and it has been used for decades in astronomy, it doesn't suit general photography too well.</p><p></p><p>The problem is that we don't know the convolution kernel for each lens, each aperture, each subject distance, each zoom setting. What these software developers do is they use a general gaussian kernel which does not deliver any better (if that) results than conventional local contrast enhancing "sharpening" methods.</p><p></p><p>Rawtherapee has a built in Richardson-Lucy deconvolution sharpening (from astronomy) and the software is free.</p></blockquote><p></p>
[QUOTE="pforsell, post: 514174, member: 7240"] While deconvolution sharpening has solid mathematical foundation and it has been used for decades in astronomy, it doesn't suit general photography too well. The problem is that we don't know the convolution kernel for each lens, each aperture, each subject distance, each zoom setting. What these software developers do is they use a general gaussian kernel which does not deliver any better (if that) results than conventional local contrast enhancing "sharpening" methods. Rawtherapee has a built in Richardson-Lucy deconvolution sharpening (from astronomy) and the software is free. [/QUOTE]
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