Hi Michal,
Please check the GIT code, as the bugs you report may
be already solved. The unicode works fine to me now and
the V4 sRGB profile works also fine, given the limited
precision it has.
Regards
Marti
Quoting Michal Soltys <sol...@ziu.info>:
> Ah, great. Thanks for quick fixing.
>
> Regarding bugs, I think I found small cosmetic bug in transicc
> (although with potential side effects) - if the profile contains
> unicode (utf-16be in this case) strings, it is treated as a regular
> ascii string - example output:
>
> Output profile:
> sG 4ICpeeec ecpulitn e
> Cprgt20 nentoa oo osri
>
>
> Btw - when testing with sRGB v4 profile:
>
> transicc -t1 -v3 -i sRGB_v4_ICC_preference.icc -o sRGB_v4_ICC_preference.icc
>
> R? 0 G? 0 B? 0
> R=-0.3043 G=-0.0087 B=0.0021
> [PCS] Lab=(10.9194,0.0195,-0.0078) XYZ=(1.2056,1.2497,1.0314)
>
> R? 1 G? 1 B? 1
> R=0.7644 G=1.1842 B=1.0450
> [PCS] Lab=(11.1360,0.0039,0.0039) XYZ=(1.2345,1.2802,1.0557)
>
> R? 2 G? 2 B? 2
> R=1.8321 G=1.7806 B=1.91417
> [PCS] Lab=(11.3405,-0.0117,-0.0039) XYZ=(1.2621,1.3093,1.0803)
>
> R? 3 G? 3 B? 3
> R=2.8999 G=2.9735 B=2.9570
> [PCS] Lab=(11.5511,0.0234,0.0078) XYZ=(1.2926,1.3398,1.1047)
>
> R? 7 G? 7 B? 7
> R=6.6369 G=6.8504 B=7.1287
> [PCS] Lab=(12.3430,0.0117,-0.0078) XYZ=(1.4069,1.4587,1.2039)
>
>
> R values in particular - -0.30(0), 0.76(1), 6.64(7) - are they proper in
> context of PCS -> sRGB transfer ? Even if after rounding we get proper
> integers (0, 1, 7), they seem dangerously off the spot. Following one of
> the whitepapers from color.org, no-bpc v2 profile ("type 1 v2 profile")
> should roughly give the same results as v4, and theoretically,
> shouldn't provide worse accuracy. If the profile is fine, maybe there is
> some other bug lurking somewhere.
>
> http://www.color.org/srgbprofiles.xalter
> http://www.color.org/ICC_White_Paper_26_Using_the_V4_sRGB_ICC_profile.pdf
>
>
> Regards
> Michal
>
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