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Shell Programming and Scripting
Perl Regular Expression - Whitelist
Post 90037 by reggiej on Thursday 17th of November 2005 04:33:02 PM
11-17-2005
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My
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Hi,
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Could you help me with this please. This regular expression seems to match for the wrong input
#!/usr/bin/perl
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{
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Hi I am doing something basic like...
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LEARN ABOUT FREEBSD
pnmdepth
pnmdepth(1) General Commands Manual pnmdepth(1) NAME
pnmdepth - change the maxval in a portable anymap SYNOPSIS
pnmdepth newmaxval [pnmfile] DESCRIPTION
Reads a portable anymap as input. Scales all the pixel values, and writes out the image with the new maxval. Scaling the colors down to a smaller maxval will result in some loss of information. Be careful of off-by-one errors when choosing the new maxval. For instance, if you want the color values to be five bits wide, use a max- val of 31, not 32. One important use of pnmdepth is to convert a new format 2-byte-per-sample PNM file to the older 1-byte-per-sample format. Before April 2000, essentially all raw (binary) format PNM files had a maxval less than 256 and one byte per sample, and many programs may rely on that. If you specify a newmaxval less than 256, the resulting file should be readable by any program that worked with PNM files before April 2000. SEE ALSO
pnm(5), ppmquant(1), ppmdither(1) AUTHOR
Copyright (C) 1989, 1991 by Jef Poskanzer. 08 April 2000 pnmdepth(1)