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PIX-BW(1)			    BRL-CAD			     PIX-BW(1)

NAME
       pix-bw -	combine	pix color planes into a	bw black and white image

SYNOPSIS
       pix-bw [-s squaresize] [-w width] [-n height]
	      [[-e ntsc|crt] [ [-R r_weight] [-G g_weight] [-B b_weight] ]]
	      [-o out.bw] [[<]in.pix] >	out.bw

DESCRIPTION
       pix-bw will combine or select the color planes of a pix(5) format file
       from its	standard input and produce a black and white bw(5) file	on its
       standard	output.

       The -w file_width flag specifies	the width of each scanline in the
       input file, in pixels. The -n file_height flag specifies	the height in
       scanlines of the	input file. They are set to the	same value using -s
       squarefilesize.

       By default all three colors are weighted	equally. The -e	type flag can
       be used to specify a standard weighting scheme; the type	choices
       include:

       ntsc
	   weighting used is based on the NTSC primaries and the D6500
	   alignment white.

       crt
	   weighting scheme used will be for "typical" CRT phosphor
	   chromaticities and the D6500	white.

       Individual color	plane(s) can be	selected via the -R#, -G#, and -B#
       options.	The value used with each flag will be treated as a weight to
       be applied to that color.

       If 0 is supplied	by the user for	weights, then the weights assigned are
       1.0 divided by the number of colors selected.

EXAMPLES
       pix-bw -R0.0 -B0.0 < file.pix > file.bw

       will equally blend the red and blue color planes; because -G is
       omitted,	the green color	plane is not considered. (Had "-G0.0" been
       included	in this	example, the three colors would	have been weighted
       equally,	as in the default condition.)

       pix-bw -R0.30 -G0.59 -B0.11 < file.pix >	file.bw

       has the same effect as the -ntsc	flag.  [The -crt weights are: 0.26,
       0.66, 0.08]

SEE ALSO
       brlcad(1), pix-bw3(1), bw-pix(1), pix(5), bw(5)

AUTHOR
       BRL-CAD Team

COPYRIGHT
       This software is	Copyright (c) 1989-2019	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			     PIX-BW(1)

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

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