Regular expression (regex) required Post: 302384694

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1 1982 1 testing init.cc 3001 Apr 25 2014 09:56:13.617 Task(0x5bac5060) tRestart (stack st:0x5bace000, end:0x5bac8000) deleted 1 1982 1 testing init.cc 3001 Apr 25 2014 09:56:13.628 Task(0x5bac5060) tRestart (stack st:...

LEARN ABOUT ULTRIX

ppmtopgm

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Regular Expression + Aritmetical Expression

Discussion started by: Z0mby

2. Linux

Regular expression to extract "y" from "abc/x.y.z" .... i need regular expression

Discussion started by: rag84dec

3. UNIX for Advanced & Expert Users

Regular expression / regex substition on Unicode text

Discussion started by: thomas.hedden

4. Shell Programming and Scripting

Integer expression expected: with regular expression

Discussion started by: ketkee1985