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BWSHRINK(1)			    BRL-CAD			   BWSHRINK(1)

NAME
       bwshrink	- shrink a black and white bw file

SYNOPSIS
       bwshrink	[-s squareinsize] [-w in_width]	[-n in_height]
		[-f shrink_factor] [-u]	[infile.bw] > outfile.bw

DESCRIPTION
       bwshrink	will take a black and white bw(5) format file of given
       dimensions and produce a	smaller	scaled version.	The -w and -n flags
       specify the input file width and	number of scan lines in	pixels.	They
       can both	be set to the same value via -s.  Defaults of 512 are assumed
       for unspecified dimensions. The integer scaling factor is set with the
       -f flag.	By default, the	factor is 2.

       The program reads the entire image into memory, and then	scales the
       image down to 1/factor the original size	in both	dimensions.

       By default, bwshrink uses boxcar	averaging to produce the output	pixels
       from the	input. The -u option causes bwshrink to	use image
       undersampling instead.

SEE ALSO
       brlcad(1), bwcrop(1), bwrect(1),	bwscale(1), bw(5)

BUGS
       If the dimensions of the	input image are	not evenly divisible by	the
       shrink factor, incorrect	and bizarre output is generated.

AUTHOR
       BRL-CAD Team

COPYRIGHT
       This software is	Copyright (c) 1991-2019	by the United States
       Government as represented by U.S. Army Research Laboratory.

BUG REPORTS
       Reports of bugs or problems should be submitted via electronic mail to
       devs@brlcad.org

BRL-CAD				  03/02/2021			   BWSHRINK(1)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | BUGS | AUTHOR | COPYRIGHT | BUG REPORTS

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