nanogui: getting for jpeg to pbm for convpbm
Subject:
Re: [nanogui] getting for jpeg to pbm for convpbm
From:
Alex Holden ####@####.####
Date:
25 May 2004 13:36:07 +0100
Message-Id: <40B33D9C.4030109@linuxhacker.org>
tj wrote:
> What confusd me was getting from pnm to pbm. I was looking for a
> "pnmtopgm". I guess ppm and pnm are one in the same?
PPM (Portable PixMap) is colour.
PGM (Portable GreyMap) is greyscale.
PBM (Portable BitMap) is black and white.
PNM (Portable aNyMap) is the collective name for all of the above.
jpegtopnm is called that instead of jpegtoppm because there is such a
thing as a greyscale jpeg (I've never encountered one though), which it
will convert to a pgm instead of a ppm. I don't think it'll do any harm
to run ppmtopgm even if you do find a greyscale jpeg- it just won't
perform any conversion if the input is already a pgm.
--
------------ Alex Holden - http://www.linuxhacker.org ------------
If it doesn't work, you're not hitting it with a big enough hammer
