[argyllcms] Re: collInk for softproofing

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Fri, 19 Oct 2012 12:09:39 +1100

Diego Carra wrote:


> collink -v -ila -G -qh -cpp -dmt Argyllv140_396parxes48Gris3Blanc.icm 
> AdobeRGB1998.icm 
> Argyllv140_396parxes48Gris3Blanc_v.icm

This creates a device link transformation from the target output space to the
display space (or you could substitute some other display target - sRGB, or
the display profile itself if you dump the pixels directly on the display).
It tries to preserve the expected look of the image from the output space,
when displayed on the display device.

This is a true softproof transform that transforms from the target output space
back to a display device. So to use this you first have to transform
your original image into the target output space using your proposed
output profile or device link, and then separately apply the above
device link to transform into a display space - ie. a 2 step process.

Note that many people & products use the term "soft proof" to refer to a more
complex and less truthful workflow, which tries to combine both the
transform from the original source space to output device with a reverse
soft proofing transform in a single step.

> cctiff Argyllv140_396parxes48Gris3Blanc_v.icm skin_sky_p.jpg skin_sky_pv.jpg

This is using the ArgyllCMM to apply the device link.

> So I tried these
> command but probably unfotunately i miunderstand the real power of these 
> command Now I
> tell you what I did. I though to use all the two command with an image of 
> mine and
> using .icm file created for a backlit panel to arrive to a jpg file show me 
> the
> softproof. But Unfortunately the jpg I arrive is really jellowish and tint 
> uncolored.

Without seeing you full workflow, it's hard to comment.

> (unfortunately I can't show you becouse is publish protected copyrith) So I 
> ask you the
> ICM profile I arrive with collink could be used in photoshoph to soft proof? 
> In any way

I understand that recent versions of Photoshop allow you to use device links.
Not having such a version of Photoshop, I can't help you with how that

> normally I use the Icm file I create with argyll with colprof to make my 
> softproof in
> photoshop, Is this procedure correct? Or not at all. 

Sorry, I'm not sure what you mean by that.

Graeme Gill.

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