Manual: pnmtopnm

Pnmtopnm User Manual(1)				   General Commands Manual			     Pnmtopnm User Manual(1)

NAME
       pnmtopnm - copy a PNM image

SYNOPSIS
       pnmtopnm

       [pnmfile]

DESCRIPTION
       This program is part of Netpbm(1).

       pnmtopnm	 simply	 copies a PNM image to Standard Output.	 The output has the same major PNM format (PBM, PGM, or PPM)
       and maxval as the input.	 This may seem an unnecessary duplication of cat, but it lets you convert between the  plain
       (ASCII)	and  raw (binary) subformats of PNM.  Use the -plain Netpbm common option to ensure the output is plain PNM,
       and don't use -plain to ensure the output is raw PNM.  See  Common Options .

       You don't normally need to convert between the PNM subformats, because any program that uses the	 Netpbm	 library  to
       read  a	PNM image will read all of them directly.  But there are a lot of programs that don't use the Netpbm library
       and understand only the raw format.  Plain format is nice because it is human readable; people often use it to  debug
       programs that process PNM images.

       pnmtopnm	 is really just another name for the program pamtopnm.	The latter does the job because like any Netpbm pro‐
       gram that takes PAM input via the Netpbm programming library facilities, it also takes PNM input.

OPTIONS
       There are no command line options defined specifically for pnmtopnm, but it recognizes the options common to all pro‐
       grams based on libnetpbm (See  Common Options .)

HISTORY
       pnmtopnm was new in Netpbm 10.23 (July 2004).  It obsoleted pnmtoplainpnm, which specifically did the  conversion  to
       plain  PNM.   There  was	 no program to explicitly convert to raw PNM, but many Netpbm programs can be made, with the
       right options, to be idempotent (i.e. to do the same thing as pnmtopnm).

       Then David Jones realized that the existing pamtopnm already did everything that pnmtopnm did and more, so in  Netpbm
       10.27 (March 2005), pnmtopnm became simply an alternate name for pamtopnm.

SEE ALSO
       ppmtoppm(1) pgmtopgm(1) pamtopnm(1) pnm(1)

DOCUMENT SOURCE
       This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation is at

	      http://netpbm.sourceforge.net/doc/pnmtopnm.html

netpbm documentation					24 March 2005				     Pnmtopnm User Manual(1)