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  1. Recently (within the past few years), Windows BMP files were allowed to have a new header type, called BitmapV4Header (the old one was called BitmapInfoHeader). This new header allows for storing ciexyz endpoints for each color channel, in effect, telling software that can handle this new header, how to map absolute colors (XYZ values) to RGB values present in the image. Therefore, by manipulating these values, by manually editing these ciexyz endpoint values in the header of such a Bitmap file, you could theoretically manipulate how a Bitmap-Version-4-compliant software would display colors in that image. I've actually wanted to try that out. However, Windows itself doesn't supply software that is compliant with the new header. Software such as MS Paint doesn't change how it displays the image when I manually edit the ciexyz endpoint values in the header of such a bitmap file. It seems to ignore this extended header, and treat it like a regular bitmap file.

    Are you aware of any software out there, that actually uses these ciexyz endpoint values in BMP files that have a BitmapV4Header to affect how images are displayed in the software? In other words, are you aware of any BitmapV4 compliant software that exists? I've already tried Photoshop Elements (it came on my laptop for free when I bought it), and I've already tried Gimp. Neither of these respect the ciexyz endpoint values in question, so manually altering them in a hex editor has no effect on how the image is displayed. Does the full (very expensive) version of Photoshop actually use these values in BMP files that have them? Is there any free software that does?
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  2. Member Cornucopia's Avatar
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    I doubt you'll find much: software that works with expanded color spaces would gravitate to formats that are known to already natively support colorspace variants.

    Scott
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