When cropping, file is saved at the 0.75 jpeg quality factor, irrespective of the orginal file quality You can check with imagmaick command : identify -verbose *.jpg *.jpeg | grep -i quality gwenview should 1) save with the same quality factor 2) offer an option in the general settings to offer a fixed factor different of that of the read file Thanks On mandriva cooker and and 2011
> save with the same quality factor If you want to retain quality, you have to save to a lossless format, or with q=1.00 if you need JPEG. What imagemagik tells you is information, it doesn't mean that it's best to save again at this setting.
it is the same problem with red eye reduction by the way this is faster : identify -format "%Q" *.jpeg than identify -verbose *.jpg *.jpeg | grep -i quality >>If you want to retain quality, you have to save to a lossless format Indeed, and I am using raw format as well. plus I can use jpegtran -crop WxH+X+Y <<Crop the image to a rectangular region of width W and height H, starting at point X,Y. The **lossless** crop feature>> I suppose gwenview uses the crop feature (or libraries) of convert / imagemagick This may not be lossless, I do not know Nevertheless, I do not want gwenview to choose the quality factor for me. Especially to go from 0.94 to 0.75 >>it doesn't mean that it's best to save again at this setting. This wahy I am asking it saves with the same quality factor as the original file
*** This bug has been marked as a duplicate of bug 294594 ***