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I was thinking about CFA mosaic and JPG compression, I think these may introduce some axis aligned artifacts. But maybe they took it into account (using raw for
by fridek 15y ago
I was thinking about CFA mosaic and JPG compression, I think these may introduce some axis aligned artifacts. But maybe they took it into account (using raw format?) or effect is not relevant in this case.
- trunnell 15y agoEven in raw format, all digital cameras apply some amount of sharpening [1] even when the setting is "off" in the camera menu. Also, all raw format conversion software (Lightroom, Capture One, etc.) applies sharpening by default. I could imagine that a sharpening algorithm could transform a random distribution into something with structure. That the authors appear to not reference camera or image sharpening anywhere in the paper is somewhat worrisome. [1] http://en.wikipedia.org/wiki/Unsharp_masking http://en.wikipedia.org/wiki/Unsharp_masking