[Digikam-users] Problem with digikam edited jpegs

[Gilles Caulier]

Hi JC,

I remember to have read a comment in bugzilla about this subject, but i
cannot find again the link... But i'm sure than the problem is relevant of
theses optimizations options passed to JPEG library :

http://bugs.kde.org/show_bug.cgi?id=130996

Like you can see, i have added 2 new line in digiKam JPEG encoder :


 +    // B.K.O #130996: set horizontal and vertical Subsampling factor to 1
for a best
 +    // quality of color picture compression.
 +    cinfo.comp_info[0].h_samp_factor = 1;
 +    cinfo.comp_info[0].v_samp_factor = 1;

If you have recompiled digiKam yourself, you can perform  a  simple test to
comment  these line in  digikam/libs/dimg/loaders/jpegloader.cpp located in
JPEGLoader::save() method.

Just recompile and install digiKam and try again.

If problem diseapear, let's me hear. i will add a new option in JPEG
settings panel to enable/disable these optimizations.

Regards

Gilles Caulier

2007/6/19, jc <jumpingclear at yahoo.co.uk>:
>
> I recently edited some jpegs in digikam 9.1 - quite heavy levels and
> colour correction. I am having odd problems when opening them in some
> windows programs and when printing them. On some I added a plain white
> border. When opening the pic in windows xp picture viewer the border is
> green (I boosted green quite a bit in the jpeg before adding the border)
> and the colours in the photo are displayed differently to how they look in
> digikam. I get the same effect when opening them in CS2 bridge. However,
> in XNview and when opening in CS2 itself they display as in digikam. When
> printing the colours are also incorrect but the printer prints unedited
> pics ok. I tried opening one in XNview and then resaving without any
> changes and the resaved version displays correctly in xp image viewer.
>
> Any ideas?
>
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