"This article shows how to perform image manipulation
using command-line tools. I do this job quite often, since I've
picked up a some digital cameras and now manage a library of
several thousand happy snaps. For Web developers and administrators
who frequently have to batch-process large numbers of images,
command line tools are an especially attractive option, because the
developer can incorporate them into scripts. But even if you only
want to perform a manipulation once or twice, a command-line
alternative can save time.
"The command line tools discussed in this article are part of
the excellent ImageMagick suite, which ships with Red Hat Linux and
is freely available online (see Resources). ImageMagick can also be
accessed via C, C++, Perl, Python, Java, and several other
languages, which Linux programmers will appreciate." This is an oldie, but still a goodie--.ed
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