[argyllcms] Re: collInk for softproofing

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Mon, 22 Oct 2012 18:37:59 +1100

Xavi wrote:

Hi,

> If I calculate the softproof value for a patch using the next method:
>  
> .\icclu -fb -ip
> MP_B01_A4_HPEverydayBrilloIIQ1Dif_NoVPre_396p64g3bArgyllv140_121011Opcio_qm_ACPU.icm
> 28.870000 14.810000 -50.150000 [Lab] -> Lut -> 0.358232 0.399245 0.879326 
> [RGB]

> .\icclu -ff -ir
> MP_B01_A4_HPEverydayBrilloIIQ1Dif_NoVPre_396p64g3bArgyllv140_121011Opcio_qm_ACPU.icm
> 0.358232 0.399245 0.879326 [RGB] -> Lut -> 39.085966 11.557139 -49.964686 
> [Lab]

> The Lab value is not the same that the printed patch and also different to
> the values obtained on the PS conversion.

This is expected. Perceptual rendering is not Colorimetric rendering.

Graeme Gill.

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