I think I've found the solution. I was downloading photos
from the camera with iPhoto, which didn't distort the
colors. However, it didn't appear to properly convert
them to a color space that gimp liked. When I download
the photos from the camera with the Canon software, they
don't need to be converted when I open them with gimp.
They seem to be the correct colors now. Phew! Thanks for
your help. All the questions got me moving in the right
direction. -- Felicia
Hi Felicia
I am asking more questions than answering any!
I have no knowledge on the Camera side, but could you
confirm whether or not this difference (R:56 vs R:54 etc.)
is a constant difference (throughout the image, and also,
throughout different images)?
If it is, you can in the meantime easily correct it by
saving that change to the RGB and applying it every time
(annoying I know!), but if it is not, then it would be
quite a pity!
It is quite disturbing how big the difference is visually
on your examples!
One more question: Does the camera save the image in JPEG
format, or is it its own lossless format?
Paul
-----Original Message-----
From: Felicia [mailto:felicia@panix.com]
Sent: 27 October 2009 01:13
To: Paul Naude
Subject: RE: [Gimp-user] GIMP Color Problems
The same pixels in each image has different values. For
example, what is R:56 G:97 B:0 in Pixelmator is R:54 G:95
B:0 in GIMP. Yes, I also think that there is a problem
with the color system. I get the impression that there is
a way to install something into gimp's color management
system that is specific to my camera, but I couldn't find
any concrete info on this online. Thoughts? -- Felicia
Felicia
Could you confirm whether or not it is only the display
that differ, i.e. does the same pixel in both images
have
the same RGB values?
If not, it could mean that your camera uses a different
colour system than RGB and that there is a difference in
conversion.
If the RGB values are the same, it means that both
programs should print the exact same image but that
there
may be something wrong with the way it is displayed on
screen.
Paul
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