Your best bet for a lossless JPEG crop is to use ImageMagick or the JPEG
utils rather than GIMP. IIRC, there has been talk about allowing GIMP to do
the few lossless JPEG transforms that are possible, but I haven't seen
patches or release notes to the effect. something like
jpegtran -perfect -cr
Is it possible in Gimp to crop a part of a JPEG image
and save it as another JPG without loosing on quality
?
If I use a quality factor of 100% ( Excellent
quality), the cropped image has a bigger filesize than
the original image !!
Krishnan
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Y