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rgb2ntsc.m
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1996-09-28
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# Copyright (C) 1995 John W. Eaton
#
# This file is part of Octave.
#
# Octave is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any
# later version.
#
# Octave is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License
# along with Octave; see the file COPYING. If not, write to the Free
# Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
function yiq = rgb2ntsc (rgb)
# Image format conversion.
# Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994.
if (nargin != 1)
usage ("rgb2ntsc (rgb)");
endif
trans = [ 0.299, 0.596, 0.211;
0.587, -0.274, -0.523;
0.114, -0.322, 0.312 ];
yiq = rgb * trans;
endfunction