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Date: Mon, 30 May 2005 15:04:08 +0200
From: Jean-Yves Le Ridant <jean-yves.leridant@culture.gouv.fr>
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To: "Marti Maria" <sales@littlecms.com>
Subject: Re: [Tiff] How to Write a tif file with compression=COMPRESSION_JPEG&
	photometric = PHOTOMETRIC_YCBCR ?
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Status:   




> Hi,

>> Have someone seen a ICC profile, a EXIF object, a BROUZOUF object,
>> make something else than adding ambiguity ?
>> ( Don't say waste CPU cycles and RAID cylinders, I know )
>> :-)))

> ICC profiles, many times. Of course if you embed the wrong profile, then it
> is going to mess out your image, but used properly works quite well.

I can understand "wrong" profile regarding things like colorspace
description ( primaries, white point ....), less easily for "intents"
...
And when a soft give me the choice between 3 CMS giving différents
results for the same "rendering options" ( choosen from a dozen)
I hardly deal with the concept of a "proper use".

> Photometric=Lab and Samples per pixel=1 is legal as it is documented in the
> TIFF Technote #2 (March 22, 2002), see page 13:

> SamplesPerPixel - ExtraSamples: 3 for L*a*b*, 1 implies L* only, for monochrome data.

Thanks

--
Jean-Yves




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