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|hdtv|hdr|avg] [ [-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

crt

hdtv

hdr

avg

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 -R0.3 -G0.6 -B0.1 < file.pix > file.bw

applies weights close to the -ntsc flag.

SEE ALSO

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

AUTHOR

BRL-CAD Team

COPYRIGHT

This software is Copyright (c) 1989-2021 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