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[Gimp-developer] Thoughts on CMYK, and getting it without implement   Message List  
Reply | Forward Message #14185 of 14186 |
Re: [Gimp-developer] Thoughts on CMYK, and getting it without implementing it.

At 05:23 AM 11/30/2001 +0100, pcg@... ( Marc) (A.) (Lehmann ) wrote:
>1. implement CMYK saving in tiff and eps.
>

You may also want to do it for JPEG - but if you do, consider that
Photoshop writes inverted CMYK.


>2. enhance tiff(?) & eps to save all channels & paths in whatever format
> is actually understood (DCS for eps). one path must be marked as
> clipping path (e.g. by name "Clipping Path" or by some parasite
> (gimp-clippath on the image containing the ascii form of the path
> tattoo or somesuch).

TIFF can store the clipping path in it's own way, BUT Adobe has
also created their own way to store the clipping path in the standard image
formats using "ADOBE" tags. This allows them to maintain the clipping path
in TIFF, PNG, JPEG, PSD, etc. We support the extraction of this info in
ImageMagick.


LDR

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Sat Dec 1, 2001 1:45 pm

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leonardr@...
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Forward 		Message #14185 of 14186 |
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Sorry that it took so long, Simon ;) Anyways, I had some conversation with two graphics designers about CMYK problems and the Gimp at the Systems, and I think... 		MarcA.Lehmann
pcg@...
Send Email 		Nov 27, 2001
2:10 pm

... [observations snipped] Wow! Marc Lehmann has written an email that's actually useful and well-thought out! His "60% CMYK" makes sense to me. Now all I...
Austin Donnelly
austin@...
Send Email 		Nov 27, 2001
2:21 pm

Hmm .. this is a pretty cool writeup. :) On Tue, Nov 27, 2001 at 03:10:15PM +0100, Marc A. Lehmann wrote: [...] ... [...] ... Can you remember any specific...
Malcolm Tredinnick
malcolm@...
Send Email 		Nov 27, 2001
2:33 pm

Hi, ... Well, actually this would be true. sRGB is defined using the phosphors standartised for HDTV and used for monitors. And as gimp does no colour ...
Jens Ch. Restemeier
jrestemeier@...
Send Email 		Nov 27, 2001
6:51 pm

... Okay, let's write this in other words: sRGB is based on ITU-R BT.709 primaries which are for example standartised for HDTV and should be reasonably close...
Jens Ch. Restemeier
jrestemeier@...
Send Email 		Nov 28, 2001
7:18 pm

... CMYK ... worthwhile ... are ... Thanks for writing this stuff up. I think I should mention that I work in the prepress department of a highend...
Jay Cox
jaycox@...
Send Email 		Nov 29, 2001
11:18 am

... That's what I was told, too (together with: many people do it with photoshop anyways ;) ... But how critical is that process? Do you think that my main...
MarcA.Lehmann
pcg@...
Send Email 		Nov 30, 2001
4:23 am

... Where I work it is a very critical process. At smaller shops that work with less compulsive designers it is much less critical. This feature would not...
Jay Cox
jaycox@...
Send Email 		Nov 30, 2001
11:38 am

On Fri, Nov 30, 2001 at 03:38:10AM -0800, Jay Cox <jaycox@...> wrote: [cmyk comversion] ... Any tips here? If gimp would support CMYK on-screen, how would...
MarcA.Lehmann
pcg@...
Send Email 		Nov 30, 2001
6:06 pm

... You may also want to do it for JPEG - but if you do, consider that Photoshop writes inverted CMYK. ... TIFF can store the clipping path in it's own way,...
Leonard Rosenthol
leonardr@...
Send Email 		Dec 1, 2001
1:55 pm
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