rawtoppm(1)rawtoppm(1)NAMErawtoppm - convert raw RGB bytes into a portable pixmap
SYNOPSISrawtoppm [-headerskip N] [-rowskip N] [-rgb|-rbg|-grb
|-gbr|-brg|-bgr ] [-interpixel|-interrow] width height
[imagedata]
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 (per-
haps using dd), turning each part into a PGM file
with rawtopgm, and then combining them with
rgb3toppm.
SEE ALSOppm(5), rawtopgm(1), rgb3toppm(1), pnmflip(1)AUTHOR
Copyright (C) 1991 by Jef Poskanzer.
06 February 1991 1
