9/12/2023 0 Comments On resize![]() I really would have a closer look to that and test with other sharpening methods. Maybe there are better solutions available then disabling gamma correction. ![]() If you have a look to the original image from chrizz in the other thread, you see that it has allready some artefacts, so visually tolerable, but they are allready there. Sounds possible, right? But I'm not sure. But the explanation with examples from Eric Brasseur are really good and detailed I think.Ĭould it be that the posterization is allready in the original images? At a very low scale, but allready there? And yes if you then darken the images together with resizing you end up not seeing it that strong. If you want try it on your own images, you may incorporate a grayscale and / or other colortargets and check the results by the histograms or with the colorchecker in photoshop. These ones results in to darkened images. They are brigther in comparision to the ones resized with gamma errors. In fact with first linearizing to 1 and after resizing linearizing back result in correct images. I suppose this happens since the first versions of these software, maybe 20 years ago. The degradation is often faint but probably most pictures contain at least an array where the degradation is clearly visible. Photographs that have been scaled with these software have been degradated (see the examples). (Software that don't have the problem are listed in the Solutions chapter.) ![]() Also three different operating systems were used: Linux, Mac OS X and Windows. ![]() ![]() All software tested (August 2007) had the problem: The Gimp, Adobe Photoshop, CinePaint, Nip2, ImageMagick, GQview, Eye of Gnome, Paint and Krita. There is an error in most photography scaling algorithms. ![]()
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