[magick-users] convert -crop image quality question

[Anthony Thyssen]

"J. Young" on  wrote...
| Hi all,
| 
| I have some two-page landscape-orientation jpg scans of a book that I 
| wish to cut in two to view better on my psp device.
| 
| I issued this command to perform the work:
| 
| convert bigpage.jpg -crop 50%x0+0+0 page1.jpg
| convert bigpage.jpg -gravity East -crop 50%x0+0+0 page2.jpg
| 
| So this works ok, but is it a lossless operation as far as image 
| quality?  If not, could someone recommend a lossless equivalent?
| 
JPEG to JPEG is always lossless in IM.

and there does not appear to be a lossless cut or crop opperation
provided by jpgtran.    I'd say you best bet is to just not save back to
JPEG, or upgrade to using the new JPG2K library.

Warning few browsers and programs suport this new jpeg format as yet.

  Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
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  My french isn't %$@#$%^&* good either...  pardon my french ;-)
                                                  -- Anthony Thyssen
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