pnmtopnm1

Usage

Overview

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 ⟨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 programs 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 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 programs based on libnetpbm (See
Common Options ⟨index.html#commonoptions⟩ .)

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