> In fact my question was more, given a normal LDR image with variation of
> intensity clipped between 0 and 1, is it possible to create directly a HDR
> image by calculating the intensity value from the clipped one, by using a
> function I=f(r,g,b) with I being maximum (and much higher than 1 of
course)
> for White?

From a single image, you could only approximate it. All of the clipped areas
(large areas of pure white or pure black) would have to be guessed about.

 - Slime
[ http://www.slimeland.com/ ]

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