[Digikam-devel] JPEG lossless crop

Sebastian Röder sebastian.roeder at uni-bielefeld.de
Tue Jan 3 17:56:05 GMT 2006

First a happy new year to the digikam team - may it not be totaly overworked 
in 2006 by the ambitious digikam project.

During christmas holidays I prepared some digikam photos for print. That means 
I used the crop w/ ascect ratio to transform them from 4:3 to 3:2 ascpect 
ratio. Sadly this transformation is not lossless in digikam. That's bad cause 
the photo quality is important in this case (print) and no other effects were 
used. So if one could do the crop lossless  the image quality would not 

Using another file format is not an option here cause the print houses expect 
jpeg and I don't want it to be to complicated (have to explain it to my 
parents who are not that familar with computers).

I googled a bit and found out that a lossless crop function was implemented in 
jpegtran (on Gentoo part of the "jpeg" package). Now my question is whether 
there is a chance to implement this in digikam/image plugins/kipi-plugins 
whatever (sorry but I do not have an overview about the digikam packages 

This is just an idea for discussion and in no way a "I want this and I want it 
now" request. I know that you all have a lot of work with the 0.9.x digikam. 
If the discussion shows positive feedback I will add a feature request.

In the meantime it would be nice if somebody could tell me an alternative GUI 
for Linux that uses the lossless crop function from jgegtran.

Thanks in advance,

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