[argyllcms] Re: collInk for softproofing

  • From: Diego Carra <twwcar@xxxxxxxxxxx>
  • To: Argyll list <argyllcms@xxxxxxxxxxxxx>
  • Date: Sun, 21 Oct 2012 13:34:33 +0200

Tahnk you to all that reply my post.. :))  >Diego wrote> 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. 
> Grame wrote:
> Sorry, I'm not sure what you mean by that. My workflow chain is:
I have my monitor hardware calibrated with a spectrofotometer (colormunki) 
(with basiccolor) I use ArgyllCMS to:I printed a 900 and more patches for a six 
color A4 printer(canon 6600D) because I have to make a profile for a backlit 
film paper. I read it in trasmissive mode considering withe illuminant of 
trasmissive panel (backlit light)  Then I created a profile with colprof 
something like this command: colprof -v -Ztr -qh -ni -np -no -i 
ambientlampspectaldata.sp -ccx -dcx inoutfile (name of my profile) than I 
cecked it with profcheck with DeltaE2000 and I obtained max delta of 12.... I 
used this profile created in photoshop for printing my image and to softproof 
unisng it directly into photoshop (softproof menu-->Custom profile) The results 
optically in not perfect but really very similar to what I see at screen and 
what I see printed into backlit panel Really better than what I see 
softproofing with ArgyllCMS so It's sure I don't do right things using argyll 
method of softprofing. If I use Pholitchenko metod in my image I loose details 
in shadows that became deep black..If I use method of Graeme it become 
yellowish.. Not a big problem becouse I have good results of softproof with 
Ps.. But I'd like to use also ArgyllCMS for that and I'd like to understand a 
bit better this delicate matter. Good Sunday to all. Diego  > Date: Fri, 19 Oct 
2012 12:09:39 +1100
> From: graeme@xxxxxxxxxxxxx
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] Re: collInk for softproofing
> Diego Carra wrote:
> Hi,
> > 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
> works.
> > 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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