New article on color management

Started Apr 26, 2013 | Discussions thread
Jack Hogan
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Re: Camera-->sRGB versus Camera-->ProPhoto-->sRGB
In reply to Jeff Schewe, 11 months ago

Jeff Schewe wrote:

It seems to me that despite the fact that I selected 'perceptual' intent, when programs/CMMs convert to sRGB they simply bring whoever is out to left field back to the edge.

If you are working with device based matrix color spaces defined with v2 ICC profiles, there is no perceptual renderings–even if an app allows you to select it. It's always, only relative colorimetric.

If you want to use perceptual in a working space transform, you need to be using a v4 color space profile that HAS a real perceptual rendering intent. You'll want to get the sRGB_v4_ICC_preference_displayclass.icc profile available on the ICC web site. Otherwise, yes, a PP RGB>sRGB transform will always clip out of gamut color.

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Regards,
Jeff Schewe

Ah, that's why.  Good to know, thanks Jeff.

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