On Fri, 24 Oct 2008, Sebastian Sylvan wrote:
It would be nice if we could customize the gamma curve. Different devices have different gamma. Some hardware even approximates the gamma curve with piecewise linear functions. This can make a massive difference if you, e.g. degamma the image assuiming a gamma of 2.2 (typical office LCD screen), do some work on it, then convert to a gamma of 2.5 (typical TV - they assume TVs will be in a darker background setting), then the graphics card reads this as sRGB with its own piecewise linear approximation, then does some more work on it, and converts it back. Long story short, if you can't get all of those steps right the errors can add up quickly and becomes very noticable.
That is a fair point. I've only just started thinking about colour correction due to viewing environments. I remembered that dealing with colour was difficult (which is why I'm writing this library), but I forgot exactly how difficult it was. I just finished user defined linear RGB spaces in my development version. Allowing user defined non-linear RGB spaces would be a reasonable addition.
If it could read photoshop colour profiles that would be even better.
Perhaps ICC profiles would do? Or are they the same thing? -- Russell O'Connor <http://r6.ca/> ``All talk about `theft,''' the general counsel of the American Graphophone Company wrote, ``is the merest claptrap, for there exists no property in ideas musical, literary or artistic, except as defined by statute.''