Acfording to the guy who once printed some posters for me you can always convert the jpeg to some non-lossy format (tif), do your changes and then save back to jpeg. Is that incorrect? Den 4 aug 2014 23:54 skrev "Stefan Solbrig" <stefan.solb...@ur.de>:
> OK, I can see that 'JFIF' in the tombe.jpg file. But it turns out it's >> not in my file at all, only the 'Exif' header is there. Our sysadmin guys >> haven't installed the suggested exiftool tool yet; presumably exiftool will >> be capable of *adding* the JFIF header (which I gather should come before >> the Exif header, although apparently both headers want to be first). >> > > You don't have to wait for sysadmins ;-) . Just get the tarball (the > home of exiftool seems to be http://www.sno.phy.queensu.ca/~phil/exiftool/) > and you can run the script from the tar directory. (Or by setting PATH > and PERL5LIB environment variables.) > > Turns out GIMP will also save it with both the JFIF and Exif headers, and >> that works with XeTeX, and has a batch method. So I guess I could use that. >> > > As it as already been pointed out, be careful that the jpegs are not > re-encoded. If not done very carefully, it will degrade the image quality. > (Re-encoding a lossy format will loose even more information.) > > best, > Stefan > > > > > -------------------------------------------------- > Subscriptions, Archive, and List information, etc.: > http://tug.org/mailman/listinfo/xetex >
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