On occasion, I've found the need to take color samples of digital images in
situations such that using the eyedropper tool is too tedious.  POV-Ray's SDL
provides a convenient way to automate this, but POV-Ray's native color format
isn't always the most useful in other contexts.

I wrote an include file that converts linear colors to sRGB, and converts
integers or colors to hexadecimal strings.  It works POV-Ray 3.5 or later, but I
recommend 3.7, as it gives you easier control of image map gamma.  POV-Ray 3.7
also converts from sRGB to linear, which is not part of this include file.

Usage note:  With rare exceptions, I always use assumed_gamma 1.  I do not know
how relevant this file would be for any settings other than 1.

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