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blur pixel calculation bug


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This bug might actually apply to many features of paint.net in addition to Gaussian blur. It seems to me that almost any operation which modifies existing pixels will be incorrect if the gamma correction is not done beforehand. It's just especially noticeable for blurs because we have an intuitive sense for how that should look.

 

Mathematically, a function f which operates on the color components of pixels must take into account sRGB gamma correction unless f(xy) = f(x)y. I imagine such a property is pretty uncommon.

Edited by silverhammermba
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From my point of view you should assume most operations are working in sRGB without taking a gamma of 2.2 into account.

There are plugins doing this but not a lot.

At the end without using a cms you still will not get perfect results.

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