01-08-2002
5 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hello everyone,
I am just looking for ideas on how I can implement a demo version of my program which will be available in unix environment (solaris and linux).
So what I have in mind is to either implement a limited-time version (trial version expires after 30 days) or a limited-number... (4 Replies)
Discussion started by: the_learner
4 Replies
2. AIX
Hello,
I'm now trying to learn AIX and I found lot of used AIX machines in ebay. I want to clear some doubts before I go for one.
1)Do I need a license to run an AIX machine?
2)Is there any Trial versions available?
3)Some Old Models of AS400 machines( model 150) don't need a license... (1 Reply)
Discussion started by: secofr
1 Replies
3. Shell Programming and Scripting
Hi All,
I am running a script , working very fine on cmd prompt. The problem is that when I open do crontab -e even after setting editor to vi by
set EDITOR=vi it does not open a vi editor , rather it do as below.....
/////////////////////////////////////////////////////
$ set... (6 Replies)
Discussion started by: aarora_98
6 Replies
4. Solaris
Hi all,
Good day to all. Anyone here who recently tried to download a trial version for Veritas Netbackup for Sun Solaris System?
The reason for asking is that, I need to download a trial version for testing purposes. I tried to look at the Symantec website but unfortunately, it is not... (0 Replies)
Discussion started by: graboid888
0 Replies
5. AIX
hi how r? , where can I download a trial version of AIX ,
I know this is a very IMB verions but there some demo
saludos (2 Replies)
Discussion started by: cejodrake
2 Replies
LEARN ABOUT SUNOS
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)