LUM(9.1) LUM(9.1)
NAME
lum - compute luminance
SYNOPSIS
fb/lum [ input ]
DESCRIPTION
Lum computes the luminance of the input picture using the NTSC formula
L=.299R+.587G+.114B. Pixel values are mapped through the input image's
color map, if any. The resulting image is written to standard output.
SOURCE
/sys/src/fb/lum.c
SEE ALSO
picfile(9.6)
LUM(9.1)