Re: On ProPhotoRGB
Re: On ProPhotoRGB
- Subject: Re: On ProPhotoRGB
- From: Roger Breton <email@hidden>
- Date: Mon, 27 Feb 2006 20:52:13 -0500
> I have to question the
> notion that we do so reasonably well if the goal is optimal image
> reproduction
No one disputes that optimal image reproduction is always the goal.
But until we get dynamic image gamut mapping as opposed to the present ICC
fixed device gamut mapping we all live in this fixed sub-optimal image
reproduction paradigm -- mere mortals like many of us who process zillions
of images for clients who expect top-notched quality on every page but who
ain't got the money or the clout to hire professional image retouchers like
some of us here.
Fuji has showned a very promising development in this chapter of image color
processing that's on the leading edge of dynamic optimal gamut mapping - 10
years in the making, they say. Anyway, that's getting away from the point.
> -the CMS only knows about the space in which the image
> resides, not about how much of that space the image occupies!
That's the sad truth: you didn't have to turn the blade into the wound :(
(litteral translation for french : ne tournes pas le fer dans la plaie).
> With
> ProPhoto, you'd REALLY need to know which part of the space the image
> occupies.
>
> Bruce
Yet, from ProPhoto, converting to a good output profile avoids blobbing, to
a great extent, doesn't it? Maybe not optimally for you or your clients, but
it certainly gets better than 90% of the job done, wouldn't you say?
So why not have some of that heuristic baked into a "smart" RGB gamut
mapping, an sRGB "output" profile that uses B2Ax LUTs to map out Lab to RGB
in an optimal way, or something like that?
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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