Am 15.09.04, 23:37 +0200 schrieb Gerhard Fuernkranz:
> Right, and exactly this fact raises the question, whether it is useful
> anyway to apply DEVICE profiles directly to HDR images, before they have
> been luminance-scaled or dynamic-compressed for output. It might be
agree. Only an example: the SGILOGLUV encoding in the TIFF spec is XYZ. I
simply like to handle these images as XYZ in floating point color space,
and see them through the correct monitor profile on screen.
> probably useful to use matrix profiles to convert HDR images between
> working spaces, but even e.g. conversion to or processing in CIELAB
> space is IMO rather problematic with HDR images, since CIELAB requires a
> reference white point. But the actual location (luminance) of the white
> point is also not yet defined, before the image gets prepared for output.
CIE*Lab is handled like any other color space, beside the curious value
range of 0.0 -> 100.0 for L and -127.0 -> 127.0 for a and b.
regards
Kai-Uwe Behrmann
+ imaging development / panoramas
+ color management
+ email :[EMAIL PROTECTED]
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