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Posted: 2007-01-16T09:24:45-07:00
by RetroJ
I was able to reproduce this bug on
http://jjfoerch.com/bitbucket/cookie.jpg
This works fine:
This produces a corrupt image:
Code: Select all
convert cookie.jpg -gaussian 1x1 new-blurred.pnm
Using Imagemagick 6.3.1 01/10/07 Q16 on Debian.
Posted: 2007-01-16T13:37:59-07:00
by magick
A 16-bit PNM is valid. However, kview and gimp may not support anything beyond 8-bits. Try this command:
- convert original.pnm -gaussian 1x1 -depth 8 result.pnm
to create an 8-bit PNM image.
Posted: 2007-01-16T23:58:40-07:00
by anthony
technically the depth for all but bitmap NetPBM images formats (whcih includes PNM whcih is a suffix fro ANY NetPBM format without being specific) can use any maximum value from 1 to what ever your INT maximum is for your machine!
I myself use some very odd depths when using the format to create specific images.
For examples see Resized gradients...
http://www.cit.gu.edu.au/~anthony/graph ... ent_resize
Posted: 2007-01-17T14:16:59-07:00
by RetroJ
Very interesting. Nice to see that ImageMagick is not at fault here, and indeed, has a feature that those other programs lack.
