.TH QCCWAVSUBBANDPYRAMIDDWT 3 "QCCPACK" "".SH NAMEQccWAVSubbandPyramidDWT, QccWAVSubbandPyramidInverseDWT \- separable 2D discrete wavelet transform and inverse transformfor subband-pyramid data.SH SYNOPSIS.B #include "libQccPack.h".sp.BI "int QccWAVSubbandPyramidDWT(QccWAVSubbandPyramid *" subband_pyramid ", int " num_levels ", const QccWAVWavelet *" wavelet );.br.BI "int QccWAVSubbandPyramidInverseDWT(QccWAVSubbandPyramid *" subband_pyramid ", const QccWAVWavelet *" wavelet );.SH DESCRIPTION.B QccWAVSubbandPyramidDWT()calls.BR QccWAVWaveletDWT2D (3)to perform a separable 2D discrete wavelet transform (DWT) on the.I matrixfield of.IR subband_pyramid ..I num_levelsis the number of levels (scales) of decomposition to perform;the .I num_levelsfield of.I subband_pyramidis set to.IR num_levels .The.IR origin_row ,.IR origin_col ,.IR subsample_pattern_row ,and.IR subsample_pattern_colparameters as needed for.BR QccWAVWaveletDWT2D (3)are extracted from the corresponding fields of.IR subband_pyramid ..LP.BR QccWAVSubbandPyramidInverseDWT()calls.BR QccWAVWaveletInverseDWT2D (3)to perform a separable 2D inverse DWT on the.I matrixfield of.IR subband_pyramid .The number of levels of the inverse transform is retrieved from the.I num_levelsfield of.IR subband_pyramid ;.I num_levelsis set to 0 upon return of.BR QccWAVSubbandPyramidInverseDWT()..SH "RETURN VALUES"These routinesreturn 0 on success and 1 on error..SH "SEE ALSO".BR QccWAVWaveletDWT2D (3),.BR QccWAVWaveletInverseDWT2D (3),.BR QccWAVWavelet (3),.BR QccPackWAV (3),.BR QccPack (3).LPM. Antonini, M. Barlaud, P. Mathieu, and I. Daubechies,"Image Coding Using Wavelet Transform,".IR "IEEE Transactions on Image Processing" ,vol. 1, pp. 205-220, April 1992..LPI. Daubechies and W. Sweldens,"Factoring Wavelet Transforms Into Lifting Steps,".IR "J. Fourier Anal. Appl." ,vol. 4, no. 3, pp. 245-267, 1998..SH AUTHORCopyright (C) 1997-2005  James E. Fowler.\"  The programs herein are free software; you can redistribute them an.or.\"  modify them under the terms of the GNU General Public License.\"  as published by the Free Software Foundation; either version 2.\"  of the License, or (at your option) any later version..\"  .\"  These programs are distributed in the hope that they 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 these programs; if not, write to the Free Software.\"  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.