07-30-2008
Quote:
Originally Posted by
chihung
The best bet is to write a awk script to do the formatting, run time on this is 0.104s, that's 85 times faster than the original script
Wow! Nice job. This is very usable now.
Quote:
Originally Posted by
chihung
BTW, the "du" part cannot be tuned 'cos it depends on how much stuff you have
The only reason that I was using du was that I was accumulating size from each file as I processed it, and I eventually overflowed the capacity of the integer that I was using when I processed a directory with a large number of big files. I'd prefer to display just the total size of the files in the current directory (rather than go through the subdirectories like "du" does). Is this possible with awk?
Last edited by shew01; 07-30-2008 at 01:43 PM..
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LEARN ABOUT OPENSOLARIS
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)