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annotate scripts/image/rgb2ntsc.m @ 1315:611d403c7f3d

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[project @ 1995-06-25 19:56:32 by jwe]
author jwe
date Sun, 25 Jun 1995 19:56:32 +0000
parents 56520a75b5b3
children 5d29638dd524
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1 # Copyright (C) 1995 John W. Eaton
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2 #
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3 # This file is part of Octave.
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4 #
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5 # Octave is free software; you can redistribute it and/or modify it
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6 # under the terms of the GNU General Public License as published by the
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7 # Free Software Foundation; either version 2, or (at your option) any
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8 # later version.
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9 #
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10 # Octave is distributed in the hope that it will be useful, but WITHOUT
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 # for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with Octave; see the file COPYING. If not, write to the Free
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17 # Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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18
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19 function yiq = rgb2ntsc (rgb)
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20
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21 # Image format conversion.
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22
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23 # Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994.
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24
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25 if (nargin != 1)
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26 usage ("rgb2ntsc (rgb)");
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27 endif
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28
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29 trans = [ 0.299, 0.596, 0.211;
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30 0.587, -0.274, -0.523;
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31 0.114, -0.322, 0.312 ];
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32
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33 yiq = rgb * trans;
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34
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35 endfunction