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BWTHRESH(1)			    BRL-CAD			   BWTHRESH(1)

NAME
       bwthresh	- threshold a black-and-white bw file

SYNOPSIS
       bwthresh	val... < file.bw

DESCRIPTION
       bwthresh	reads from standard input a stream of black-and-white data in
       bw(5) format and	thresholds it among the	vals, writing the resulting
       bw(5) data to standard output. The vals must appear on the command line
       in strictly increasing order.

       The grey	scale 0..255 is	divided	evenly into n+1	bins, and each pixel
       of input	is compared to the vals, to determine which of the n+1 grey
       levels should be	output.

EXAMPLE
       The command

       bwthresh	37 143 < file.bw > file2.bw

       performs	the following mapping:

       if (pixel_in < 37) pixel_out = 0	else if	(pixel_in < 143) pixel_out =
       128 else	pixel_out = 255

SEE ALSO
       bwmod(1), bwstat(1), bw(5)

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			   BWTHRESH(1)

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

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