I found this mailing list post, which describes something pretty similar to what you are looking for.

Of course, that's capturing the whole screen (printscreen) or the active window (alt-printscreen). Once you had that, though, you could use ImageMagick to crop to the section you need. (That's one way, anyway. TIMTOWTDI, I'm sure.)

- Matt Riffle

In reply to Re: capture what's on the screen by mattriff
in thread capture what's on the screen by pg

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