rawtoppm man page on CentOS

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Rawtoppm User Manual(0)				       Rawtoppm User Manual(0)

NAME
       rawtoppm - convert a stream of raw RGB bytes to a PPM image

SYNOPSIS
       rawtoppm

       [-headerskip N]

       [-rowskip N]

       [ -rgb|-rbg|-grb |-gbr|-brg|-bgr ]

       [-interpixel|-interrow] width height

       [imagedata]

DESCRIPTION
       This program is part of Netpbm(1).

       rawtoppm	 reads raw RGB bytes as input and produces a PPM image as out‐
       put.  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.  rawtoppm assumes the maxval of the	input  samples
       is 255, and makes the maxval of the output PPM 255.

       rawtoppm	 assumes  the  pixels  come top first in the input stream.  If
       they are actually bottom first, the resulting PPM is  upside  down,  so
       run it through pamflip -tb.


OPTIONS
       -headerskip
	      Skip  over this many bytes at the beginning of the input stream.
	      Use this option when the input has some kind of header  followed
	      by a raster suitable for rawtoppm.

       -rowskip
	      Skip  this  many	bytes  at  the	end of each row of the raster.
	      (Some input streams have padding at the end of rows).

       -rgb -rbg -grb -gbr -brg -bgr
	      This option specifies the order of the color components for each
	      pixel.  The default is -rgb.

       -interpixel -interrow
	      These  options  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 option - all the red	 pixels,  then
	      all  the	green,	then all the blue - would be an obvious exten‐
	      sion, 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(1), rawtopgm(1), rgb3toppm(1), pamflip(1)

AUTHOR
       Copyright (C) 1991 by Jef Poskanzer.

netpbm documentation	       06 February 1991	       Rawtoppm User Manual(0)
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