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Pnmtopnm User Manual(0)				       Pnmtopnm	User Manual(0)

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 con-
       vert 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 <index.html#commonoptions> .

       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  pro-
       grams that process PNM images.

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

HISTORY
       pnmtopnm	was new	in Netpbm 10.23	 (July	2004).	 It  obsoleted	pnmto-
       plainpnm,  which	 specifically  did the conversion to plain PNM.	 There
       was no program to explicitly convert to raw PNM,	but many  Netpbm  pro-
       grams 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	every-
       thing that pnmtopnm did and more, so in Netpbm 10.27 (March 2005), pnm-
       topnm became simply an alternate	name for pamtopnm.

SEE ALSO
       ppmtoppm(1) pgmtopgm(1) pamtopnm(1) pnm(5)

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(0)

NAME | SYNOPSIS | DESCRIPTION | HISTORY | SEE ALSO | DOCUMENT SOURCE

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