man > pngtopnm(1)

Pngtopnm User Manual(1)                General Commands Manual               Pngtopnm User Manual(1)

NAME
       pngtopnm - Convert a PNG image to PNM: replaced by pngtopam


SYNOPSIS
       pngtopnm  [-verbose]  [-alpha  |  -mix]  [-background=color]  [-gamma=value] [-text=filename]
       [-time] [pngfile]

       Minimum unique abbreviation of option is acceptable.  You may use double hyphens  instead  of
       single hyphen to denote options.  You may use white space in place of the equals sign to sep‐
       arate an option name from its value.



DESCRIPTION
       This program is part of Netpbm(1).

       pngtopnm  was  obsoleted by pngtopam(1), introduced with Netpbm 10.44 (September 2008).  png‐
       topam is backward compatible with pngtopnm, plus adds many  additional  functions,  including
       the ability to produce a PAM image that includes a transparency (alpha) channel.

       Starting in Release 10.48, pngtopnm is just an alias for pngtopam.

       pngtopnm  remained in the Netpbm package through Release 10.47 because it may have fewer bugs
       than pngtopam in those releases, and may be faster in some environments.  But pngtopnm's  in‐
       compatibility with the most current PNG libraries makes it impractical to maintain along with
       pngtopam now.

       In  releases  before  10.48, you can use the pngtopam documentation for pngtopnm, considering
       the following differences:




       •      pngtopnm options are a subset of pngtopam's, as documented above.


       •      Any change that the pngtopam manual says happened in or after Netpbm 10.44 doesn't ap‐
              ply to pngtopnm.

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/pngtopnm.html

netpbm documentation                        22 July 2008                     Pngtopnm User Manual(1)