[vox-tech] Changing the print resolution of JPEG images by script

[Ken Bloom]

On Fri, Apr 08, 2005 at 03:12:38PM -0700, Henry House wrote:
> One of the more common operations that I need to do with JPEG images is to
> change their print resolution so that when printed (e.g., as included
> figures in a LaTeX document) they print at 300 dpi (for example) instead of
> 72 dpi. I have been doing this in the Gimp. This causes the JPEGs to be
> recompressed with loss of quality when the Gimp saves the files.
> 
> - Is there any ways to change the print resolution, short of editing the
>   JPEGs by hand, without recompressing them?
> 
> - Is there any utility in existance that could do this from the command
>   line? I tried the jpegtran program from libjpeg-progs in Debian, but it
>   does not seem to have this capability.

Just use the width= height= or scale= options to \includegraphics{}

for example 

\includegraphics[scale=.2]{file.jpg}

--Ken Bloom

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