[argyllcms] Re: Perceptual intent
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 19 Dec 2014 14:24:21 +1100
robert@xxxxxxxxxxxxxxxxxx wrote:
> Input Lab:
> 0 0 0
> 5 0 0
> 10 0 0
> 15 0 0
> 20 0 0
> 25 0 0
> xicclu -fb -ip iPF6400-Canson-Baryta-310-Argyll-2584.icc < LabIn.txt >
> RGBOutPerc.txt
> xicclu -ff -ir iPF6400-Canson-Baryta-310-Argyll-2584.icc < RGBOutPerc.txt >
> LabOutPerc.txt
>
> LabOutPerc:
> 0.000000 0.000000 0.000000 [RGB] -> Lut -> 3.060566 -0.115180 1.191879 [Lab]
> 0.093685 0.113280 0.118837 [RGB] -> Lut -> 12.107669 0.325751 1.103462 [Lab]
> 0.154788 0.190790 0.196084 [RGB] -> Lut -> 17.785377 -0.098978 1.349102 [Lab]
> 0.201016 0.243456 0.253762 [RGB] -> Lut -> 22.622330 -0.108052 1.351999 [Lab]
> 0.246967 0.293316 0.307076 [RGB] -> Lut -> 27.415151 -0.057629 1.217678 [Lab]
> 0.297312 0.346474 0.361547 [RGB] -> Lut -> 32.296640 -0.061477 1.196553 [Lab]
Hmm. I don't seem to be able to reproduce this using ArgyllCMS V1.6.4
and iPF6400-Canson-Baryta-310-Argyll-2584.ti3.
colprof -v -qm -s BetaRGB.icc iPF6400-Canson-Baryta-310-Argyll-2584
xicclu -fb -ip BetaRGB.icc iPF6400-Canson-Baryta-310-Argyll-2584.icm
0.000000 0.000000 0.000000 [Lab] -> Lut -> 0.000000 0.000000 0.000000 [RGB]
5.000000 0.000000 0.000000 [Lab] -> Lut -> 0.050355 0.060310 0.066793 [RGB]
10.000000 0.000000 0.000000 [Lab] -> Lut -> 0.101233 0.124620 0.134408 [RGB]
15.000000 0.000000 0.000000 [Lab] -> Lut -> 0.148904 0.183389 0.194024 [RGB]
20.000000 0.000000 0.000000 [Lab] -> Lut -> 0.193081 0.235099 0.249523 [RGB]
25.000000 0.000000 0.000000 [Lab] -> Lut -> 0.235890 0.281853 0.300302 [RGB]
xicclu -ff -ip BetaRGB.icc iPF6400-Canson-Baryta-310-Argyll-2584.icm
0.000000 0.000000 0.000000 [RGB] -> Lut -> 3.071996 -0.122961 1.209347 [Lab]
0.050355 0.060310 0.066793 [RGB] -> Lut -> 7.972708 0.042567 0.920840 [Lab]
0.101233 0.124620 0.134408 [RGB] -> Lut -> 12.787678 0.234014 0.656856 [Lab]
0.148904 0.183389 0.194024 [RGB] -> Lut -> 17.339104 0.090090 0.825353 [Lab]
0.193081 0.235099 0.249523 [RGB] -> Lut -> 21.843034 -0.005534 0.834039 [Lab]
0.235890 0.281853 0.300302 [RGB] -> Lut -> 26.271473 0.047683 0.653987 [Lab]
i.e. I don't see L* 25 in becoming L* 33 out.
Can you double check your numbers (ie. have you skipped the 5 0 0 value ??)
Graeme Gill.
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