[Digikam-devel] [Bug 172196] Color managed view is inaccurate

[Milan Knizek]

https://bugs.kde.org/show_bug.cgi?id=172196





--- Comment #17 from Milan Knizek <knizek volny cz>  2009-12-24 21:33:00 ---
There is no ICC profile embedded. It seems to use some Adobe's markers.
Exif.Colorspace is unknown (i.e. not sRGB) and exiftool -v reports:

JPEG APP14 (12 bytes):
  + [BinaryData directory, 7 bytes]
  | DCTEncodeVersion = 100
  | APP14Flags0 = 16384
  | APP14Flags1 = 0
  | ColorTransform = 2

Some googling results in:
JPEG Adobe Tags

The "Adobe" APP14 segment stores image encoding information for DCT filters.

    Index    Tag Name     Writable    Values / Notes
    0     DCTEncodeVersion     N      
    1     APP14Flags0     N     Bit 15 = Encoded with Blend=1 downsampling
    2     APP14Flags1     N      
    3     ColorTransform     N     0 = Unknown (RGB or CMYK)
                                1 = YCbCr
                                2 = YCCK

I do not know what it means from the viewpoint of colour management. Both
CinePaint and GIMP display the image the same (probably like Krita).

GIMP assigns sRGB and CinePaints assigns uncoated FOGRA CMYK profile (by
argyllcms) to the decoded image.

Non-colour managed ImageMagick's display command shows the channels swapped
(like CMYK).

Eye Of Gnome and DigiKam show the channels right, but oversaturated as in the
attachment by Jens.

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