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After editing levels (e.g. lower the max input from 255 to 240 or something, change the gamma), some histogram become "combed". Is there any ways to avoid this?
I understand this is caused by integer math. I wonder if changing the image from 8 bit / channel to 16 bit / channel would help. On the other hand, making this change already creates combs since out of 65536 brightness value, only 256 are possible from the 8 bit image. Unless, the conversion from 8 bit to 16 bit per channel involves some heuristics to generate more brightness values.
I understand this is caused by integer math. I wonder if changing the image from 8 bit / channel to 16 bit / channel would help. On the other hand, making this change already creates combs since out of 65536 brightness value, only 256 are possible from the 8 bit image. Unless, the conversion from 8 bit to 16 bit per channel involves some heuristics to generate more brightness values.

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