Shadowy Daisy

Shadowy Daisy
by damned-truths

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The global tonemap module fills a different role than the generic tone curve. Since its purpose is to compress the wide dynamic range of an HDR or RAW file in a specific way based on theories of human perception, it occurs earlier in darktables fixed-order processing pipeline, allowing the modules that follow to operate on this compressed range. It also ...


A tone curve is just a function that assigns at every pixel a brightness level based on the current value. So it is a pixel-by-pixel operation like adjusting brightness and contrast. Tone mapping is different in that it enhances perceived contrast by acting on edges and gradients. It means that two pixels of the same brightness before tone mapping become ...

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