On Sun, May 27, 2012 at 07:41:25PM +0200, Marco Ciampa wrote:
> On Sun, May 27, 2012 at 12:41:54PM +0200, Kolbjørn Stuestøl wrote:
[...]
> Maybe with Imagemagick?
> 
> http://www.imagemagick.org/Usage/resize/#resample
> 
> sorry, I'm in a hurry... try it & tell me if it could do the job for you...

        $ convert -units PixelsPerInch -density 144x144 INFILE OUTFILE
or
        $ mogrify -units PixelsPerInch -density 144x144 FILE ...

should do the trick.

But if you change/fix the resolution, you should also consider
optimizing PNG files with optipng or pngcrush.

Ulf

-- 
Die Erfindung der Sünde
war eine große Sünde
wider die Menschheit.
                -- Michael Schmidt-Salomon
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