grep and display lines from a file Post: 302348295

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LEARN ABOUT ULTRIX

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)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

display few lines of the file

Discussion started by: sharuvman

2. Shell Programming and Scripting

Display file without # lines

Discussion started by: dave123

3. UNIX for Dummies Questions & Answers

Grep and display n lines after the match is found.

Discussion started by: cv_pan

4. Solaris

grep and display few lines before and after

Discussion started by: melanie_pfefer