SCALE 8x: Color management for everyone
Posted Mar 4, 2010 17:00 UTC (Thu) by rgmoore
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In reply to: SCALE 8x: Color management for everyone
Parent article: SCALE 8x: Color management for everyone
i have never understood why applications need to care about colour management, surely it could all be done by the graphics driver.
That works for most applications that are only interested in displaying graphics; they send the color information (possibly with an ICC profile) to the graphics server and don't worry about anything else. But it's obviously not enough for a program that's supposed to be editing the graphics information itself, e.g. GIMP, Inkscape, etc. Those programs need to understand the color information to be able to edit it properly.
A good example of this kind of problem is one that I saw recently about problems with image scaling; most image processing applications do it wrong. The problem is that their color information has a gamma of 2.2, meaning that displayed intensity is supposed to be value**2.2. The correct way to apply scaling is to convert the color information to a linear value, apply the scaling, and then convert back. Instead, most image processing applications use the values with gamma applied, which results in the scaled images being too dark. A properly color aware application wouldn't make that mistake.
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