.\" This man page was generated by the Netpbm tool 'makeman' from HTML source. Pnmquantall User Manual - Online Linux Manual PageSection : 0
Updated : 05 March 2012
Source : netpbm documentation

NAMEpnmquantall - run Pnmquant on a bunch of files all at once, so they share a common colormap .UN synopsis

SYNOPSISpnmquantall [-ext extension] ncolors netpbm_file... Note that the usual syntax rules for Netpbm programs don't apply to this program. For example, you can't abbreviate -ext and you can't put it anywhere on the line you want. .UN description

DESCRIPTIONThis program is part of Netpbm(1)​. pnmquantall takes a bunch of Netpbm image files as input, chooses ncolors colors to best represent all of the images, maps the existing colors to the new ones, and overwrites the input files with the new quantized versions. If you don't want to overwrite your input files, use the -ext option. The output files are then named the same as the input files, plus a period and the extension text you specify. The purpose is this: Let's say you've got a dozen PPMs that you want to display on the screen all at the same time. Your screen can only display 256 different colors, but the PPMs have a total of a thousand or so different colors. For a single image you solve this problem with pnmquant; pnmquantall solves it for multiple images. Note that another approach to this problem is to pre-select a set of colors and then use pnmremap to separately quantize each PPM to that set.) This is a rather simple program that runs pnmcolormap and pnmremap. If you are considering using it in a program of any sophistication, you should probably just run those programs directly. Even if you are typing it, you may want to do the steps manually because it gives you access to the various options of pnmcolormap and pnmremap for doing the quantization differently. .UN options

OPTIONSpnmquantall recognizes the following command line option: -ext extension  Specify an extension for the output files. By default the input files are overwritten. pnmquantall does not recognize the options common to all programs based on libnetpbm (See
 Common Options
​.) However, the
-version option works. .UN seealso

SEE ALSO"pnmquant(1)​, "pnmremap(1)​, "pnmcolormap(1)​, "pnm(1)

DOCUMENT SOURCEThis manual page was generated by the Netpbm tool 'makeman' from HTML source. The master documentation is at http://netpbm.sourceforge.net/doc/pnmquantall.html
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