[argyllcms] Re: Cannot get calibration/profiling to yield good results, user error?

On Wed, 2008-12-31 at 10:27 -0600, Leonard Evens wrote:
> On Wed, 2008-12-31 at 14:46 +0100, Karl H. Beckers wrote:
> > Hi all,
> > 
> > I'm struggling with this display calibration/profiling exercise.
> > I have calibrated and created a profile with dispcalGUI using the
> > display's native whitepoint, target brightness of 100, gamma 2.4
> > (lcd-t-b100-g2.4-f0-k0-qhh-lut). When I load this with -I and -L colours
> > are much improved. I look at this:
> > http://www.fc-prints.de/fileadmin/daten/fcPrints_Testbild_100ppi.jpg
> > 
> > And I can see both the dark and bright "1" in the image, the colors in
> > the flower and the parrot are very natural and strong in the center
> > (apple and such).
> > When I load the icc profile in Gimp, select color corrected display, and
> > open the same jpeg in Gimp, the colors are way to saturated. The red in
> > the flower's leaves loses nearly all of its contrast and becomes a shiny
> > red blur.
> > 
> > What's wrong here?
> > 
> > - Am I supposed to load the profile in gimp? Or do I only do one of the
> > two: either dispwin OR gimp color mgmt?
> > - I noticed that with dispcalGUI, the profiling part is done with
> > calibration already loaded? Is that the right way to do it?
> > 
> > I have the gut feeling that I'm correcting twice here, but don't quite
> > know where to look.
> > 
> > TIA,
> > 
> > Karl.
> > 
> > 
> 
> I am not familiar with dispcalGUI.  I just use the command line version
> of argylcms, under Linux.   I think others who are much more
> knowledgeable than I will respond more fully, but let me make a stab at
> an answer. But you should take it with more than a grain of salt.
> 
> It sounds as if the calibration part which involves a look up table
> loaded in your video card is doing a decent job, but the profile used by
> gimp is then messing things up.  If I understand these things correctly,
> it doesn't matter how many times you load the look up table, you always
> get what you just loaded.  The previous one is written over.  I don't
> think your problem is that something is being doubly corrected, but more
> likely that you profiling was not done correctly. 
> 
> You should give more details, e.g., your operating system, your type of
> monitor, which version of gimp you are  using, etc.
> 
> I noticed that when I opened the test image, which I saved from firefox,
> in gimp, I was queried about whether or not I wanted to use the embedded
> profile as my working space.  In my case, it didn't seem to matter a
> whole lot which I chose to do.  But which choice did you make?   If you
> weren't queried, you may have reconfigure gimp preferences to query
> you. 
> 
> You can also try other applications which  use color management.   Eye
> of Gnome is one such.  Another I've had good luck with is inkscape.
> 
> 

In reference to Lars's comment.  If I open eog from the command line, I
get the same error messages

$ eog fcPrints_Testbild_100ppi.jpg 
lcms: Error #12288; Pointer error; probably corrupted file
lcms: Error #12288; profile is unsuitable for input

but the image comes up and look fine.   (If I just double click on the
icon for the image, it comes up, and of course, I don't see the error
messages.)

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