[Digikam-devel] raw problems

[Arnd Baecker]

Hi Guillaume,

On Tue, 4 Sep 2007, Guillaume Castagnino wrote:

> Hi,
>
> For your 16bits test, patch will NOT solve the dark image issue :
> To change this, you will have to use a good ICC profile.
> For example here :
> http://digikam3rdparty.free.fr/ICCPROFILES/CameraProfiles/BBP.4.9.5/
>
> I see you have a Canon camera :
> To use the right profile, I have this table for Canon (not complete
> but...) :
> Canon EOS 10D  canona.icm
> Canon EOS 20D  canon9.icm
> Canon EOS 300D  canona.icm
> Canon EOS 350D  canon9.icm
> Canon EOS 400D  canone.icm
>
> Applying the good icc profile will lead you to a well exposed image in
> 16bits mode ;)

Not for me ;-):
- I turned on color-management
  and defined the Color Profiles Directory
- editing the .CR2 brings up the Color Management dialogue
  in which I use the "selected profile" (canon9.icm)
  as input profile and workspace profile
- (for 8Bit the resulting image looks brighter than the JPG)
- for 16Bit: too dark again
  Changing the workspace profile to "use default"
  looks better (i.e. brighter), but still too dark (compared to the JPG)

And then it even complains about my  the normal JPGs
("This picture has been assigned a color profile that does not match with
your default workspace color profile.
Do you want to convert it ..." - current workspace profile
is said to be AdobeRGB - not sure where I defined that.

Well, I think I am a hopeless case about
color-management&Co at this point - should read more about
this and I better shut up here!
((Does the wish to work with 16 Bit raw but not to be bothered
by color-management make any sense?))

Thanks a lot,

Arnd