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
Am 28.09.2012 12:04, schrieb Andreas Rettig:
> Yes, I'm using ACE, and I tried all sRGB profiles I could find. As far
> as I know, PS is using the sRGB profiles in
> /System/Library/ColorSync/Profiles. ampel.icc is extracted from the
> jpg with extracticc. I tried both in Photoshop, the embedded
> 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?
Yes, I'm using ACE, and I tried all sRGB profiles I c
Hi Marti,
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.dr
Hi,
Just add cmsSetAdaptationState(1.0) at the begin of your code to get
same results as photoshop. BTW, are you using recent versions of
lcms?... that should be the default right now.
The reason why this fix the issue is somehow complicated. ICC even
published a note on that
http://color
Thanks a lot for help!
When I convert with Photoshop to sRGB / Absolute Colorimetric, I get different
colors than I get from lcms.
Example: At xy(268, 190) I get RGB(0,163,77) in Photoshop, but RGB(77, 164, 1)
in lcms.
Both images are opened in Photoshop for picking the colors.
I noticed the co
http://www.colormanagement.org/download_files/basICColor_CM-Ampel.jpg
>> Especially these grids at the borders have very different colors.
The guys that have done this test are using a perception trick which I
found to be truly amazing. Open this image in PhotoShop and move the
image across th
Hi Andreas,
I have tested your image with PS CS4 and get 1 digital count of
deviation of PhotoShop, which is due to the way different CMM do
rounding. I can see no differences in color.
Could you please detail the steps you follow to get different results?
Thanks
Marti.
El 27/09/2012 19:3
Hello,
I'm trying to make my first steps with LCMS and build a very simple application
to get familiar with everything.
All I want to do is transform a RGB-Jpeg from a special input profile to sRGB
and produce the same results I get when I do exactly the same in Photoshop.
I'm using that image
