Bob Friesenhahn schrieb:
The primary advantage of HDR image technologies is the ability to store/adjust/manipulate images without fear of saturation or clipping. Images may contain useful content in very dark or very bright regions which otherwise appear black or white. Probably CMS profiles can be developed (or exist) which are optimized for supporting HDR images, but as soon as an image is targeted for a output device, it is limited by the ability of that output device.
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 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.
-Gerhard
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