Re: [Lcms-user] First steps and some questions

[Marti M. <mar...@li...>]

Ah, yes, Qt uses a quite particular layout. When they say "RGBX" they 
mean not the
memory organization but an uint32 containing the pixel.  Then, since x86 
is little
endian, channels got swapped. I was tricked with that as well.

Just create  a QImage with rgb 1, 2,3 and examine the memory to see what 
I'm
talking about.

Glad to see you solved the issue
Regards
Marti


El 28/09/2012 13:34, Andreas Rettig escribió:
> Ok, I get exactly the same result like that from Photoshop when I 
> change my code to this:
>
> rgbInTemp[j]  =  col.green(); //before it was blue
> rgbInTemp[j  +  1]  =  col.blue(); // before it was green
> rgbInTemp[j  +  2]  =  col.red();
>
> So something with the colors seems to be wrong...
>
>
> Am 28.09.2012 um 11:23 schrieb Marti Maria <mar...@li... 
> <mailto:mar...@li...>>:
>
>>
>>> even with that parameter set, the colors are different. Absolute 
>>> colorimetric was just one Intent I tried, but it was the same 
>>> problem with all the other intents.
>>> There is always much more red in the lcms-version.
>>>
>>> Here is a comparison with INTENT_RELATIVE_COLORIMETRIC.
>>>
>>> https://www.dropbox.com/s/nsgfp2c9cab6g6w/pslcms.jpg
>>>
>>
>> Something is different in your setup. Is your ampel.icc identical to 
>> the embedded profile? Is "sRGB Profile.icc" same as the canonical 
>> "sRGB Color Space Profile.icm" used by photoshop? Are you using ACE 
>> as color engine in photoshop?
>>
>> You could try jpgicc utility to make sure the embedded profile is 
>> being honored. The profiles involved in your transform are simple 
>> matrix-shaper, which are very simple. I don't discard a bug, but I 
>> cannot reproduce it.
>> Regards
>> Marti
>>
>