04-12-2007
10 More Discussions You Might Find Interesting
1. Linux
we hv a big enviroment networked.
we use squid proxy.
access allowed by src address previously.
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is there any thing specific which has 2 b... (1 Reply)
Discussion started by: sriram.s
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Hi, I'm a newbie.
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3. UNIX for Dummies Questions & Answers
Hi every one
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Hi...
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Cano (1 Reply)
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5. Shell Programming and Scripting
I have a list of variables: ss1, ss5, ss6, ss8, st2 etc. (these values are not fixed, configurable). Now, I have assigned ss5=”test”. And I want to search in the list for the string “test” to know which variable is having the value “test”. Can u pls tell me how to do this? (10 Replies)
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6. Shell Programming and Scripting
Hi Folks,
I am new to this forum. and I just started learning shell scripting. I have a file called energy.out which looks like:
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7. Shell Programming and Scripting
When i run this command, everything is ok. The file can be email and attached but soon after i download the file, the file cant be read. It's seem corrupted. Totally cant be read although i'm using context or wordfile. Original file generated at ek_bkup/alert/tbspace_datafile.log is OK.....
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8. UNIX for Dummies Questions & Answers
I have this code:
#!/bin/sh
awk 'BEGIN
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repl = "PHI"
$4 = repl
print $0 'dryloop.txt
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#!/bin/sh
sed -e '1s/\|$/\|COMID\|/g' -e 's/^087.*$/&PHI\|g' hl.dsldryloop > textdry.txt
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9. Solaris
Hi I am new to solaris
I am running solaris from sun virtual box I am trying to create a zone but it is giving some error...
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10. Homework & Coursework Questions
How to find the ten most common words in a file (1 Reply)
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LEARN ABOUT OSF1
pbmreduce
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)