11-04-2009
Thanks a lot radoulov
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1. Shell Programming and Scripting
Hi,
Need to extract a string from one file and search the same in other files.
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Suppose pwd=/home/user/work/wip1
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3. Shell Programming and Scripting
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5. Shell Programming and Scripting
Hi all,
I have some data in the form of
adc|nvhs|nahssn|njadnk|nkfds
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adc|nvhs|nahssn||||njadnk|nkfds
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Firestar. (6 Replies)
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6. Shell Programming and Scripting
Hello,
I will be sending this command to a specific COMID:
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Need help with a a tcl code. Need to find out the ip address from a URL if it is present to do some activity.
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The username is of the format : 123456789110000-1234@something.com
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The username is of the format : 123456789110000-1234@something.com
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10. Shell Programming and Scripting
Hi,
Below is the command I use to search for IP address in a file.
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#Listen 112.34.56.58:80
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LEARN ABOUT LINUX
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)