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when toggle format what by license comment
Feb 21, 2015 at 11:47 comment added user681768917 I think the only operation that actually decreases the "resolution" is the upscaling. Many upscaling methods try to reintroduce details (e.g. using fractals) but it usually looks rather unnatural unless applied only slightly. Noise reduction may destroy details (textures etc.).
Feb 21, 2015 at 10:02 history answered Hugo CC BY-SA 3.0