1 ## Copyright (C) 2001 Paul Kienzle <pkienzle@users.sf.net>
3 ## This program is free software; you can redistribute it and/or modify it under
4 ## the terms of the GNU General Public License as published by the Free Software
5 ## Foundation; either version 3 of the License, or (at your option) any later
8 ## This program is distributed in the hope that it will be useful, but WITHOUT
9 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13 ## You should have received a copy of the GNU General Public License along with
14 ## this program; if not, see <http://www.gnu.org/licenses/>.
17 ## Computes the 2-D discrete cosine transform of matrix x
19 ## y = dct2 (x, m, n) or y = dct2 (x, [m n])
20 ## Computes the 2-D DCT of x after padding or trimming rows to m and
23 function y = dct2 (x, m, n)
25 if (nargin < 1 || nargin > 3)
41 y = dct (dct (x, m).', n).';