lum(9) plan9 man page | unix.com

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)