rawtoppm
convert raw RGB bytes into a portable pixmap
see also :
rawtopgm - rgb3toppm - pnmflip
Synopsis
rawtoppm
[-headerskip N] [-rowskip N]
[-rgb|-rbg|-grb
|-gbr|-brg|-bgr ]
[-interpixel|-interrow] width height
[imagedata]
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examples
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description
Reads raw RGB
bytes as input. Produces a portable pixmap as output. The
input file is just RGB bytes. You have to specify the width
and height on the command line, since the program obviously
can’t get them from the file. The maxval is assumed to
be 255. If the resulting image is upside down, run it
through pnmflip -tb .
options
-headerskip
If the file has a header, you
can use this flag to skip over it.
-rowskip
If there is padding at the ends
of the rows, you can skip it with this flag.
-rgb -rbg -grb -gbr -brg
-bgr
These flags let you specify
alternate color orders. The default is -rgb.
-interpixel
-interrow
These flags let you specify how
the colors are interleaved. The default is
-interpixel, meaning interleaved by pixel. A byte of
red, a byte of green, and a byte of blue, or whatever color
order you specified. -interrow means interleaved by
row - a row of red, a row of green, a row of blue, assuming
standard rgb color order. An -interplane flag - all
the red pixels, then all the green, then all the blue -
would be an obvious extension, but is not implemented. You
could get the same effect by splitting the file into three
parts (perhaps using dd), turning each part into a
PGM file with rawtopgm, and then combining them with
rgb3toppm.
see also
ppm,
rawtopgm , rgb3toppm , pnmflip
author
Copyright (C)
1991 by Jef Poskanzer.