qccwavsubbandpyramidshapeadaptivedwt.3

spiht for linux this is used to decod and encode vedio i wich all enjoy

.TH QCCWAVSUBBANDPYRAMIDSHAPEADAPTIVEDWT 3 "QCCPACK" ""
.SH NAME
QccWAVSubbandPyramidShapeAdaptiveDWT,
QccWAVSubbandPyramidInverseShapeAdaptiveDWT \- 
separable 2D shape-adaptive discrete wavelet transform and inverse transform
for subband-pyramid data
.SH SYNOPSIS
.B #include "libQccPack.h"
.sp
.BI "int QccWAVSubbandPyramidShapeAdaptiveDWT(QccWAVSubbandPyramid *" subband_pyramid ", QccWAVSubbandPyramid *" mask ", int " num_levels ", const QccWAVWavelet *" wavelet );
.br
.BI "int QccWAVSubbandPyramidInverseShapeAdaptiveDWT(QccWAVSubbandPyramid *" subband_pyramid ", QccWAVSubbandPyramid *" mask ", const QccWAVWavelet *" wavelet );
.SH DESCRIPTION
.B QccWAVSubbandPyramidShapeAdaptiveDWT()
calls
.BR QccWAVWaveletShapeAdaptiveDWT2D (3)
to perform a separable 2D shape-adaptive
discrete wavelet transform (SA-DWT) on the
.I matrix
field of
.IR subband_pyramid .
.I num_levels
is the number of levels (scales) of decomposition to perform;
the 
.I num_levels
field of
.I subband_pyramid
is set to
.IR num_levels .
.IR mask
is the transparency mask defining the shape of the data to be transformed;
the
.I matrix
field of
.I mask
is passed as the transparency mask to
.BR QccWAVWaveletShapeAdaptiveDWT2D (3).
During the process of performing the 2D SA-DWT, the
.I mask
is transformed with a Lazy wavelet transform so as to correctly indicate
where valid coefficients reside in the wavelet domain in the transformed
.IR subband_pyramid .
The transformed mask is return in
.I mask
upon completion of
.BR QccWAVWaveletSubbandPyramidShapeAdaptiveDWT() .
.LP
.BR QccWAVSubbandPyramidInverseShapeAdaptiveDWT()
calls
.BR QccWAVWaveletInverseShapeAdaptiveDWT2D (3)
to perform a separable 2D inverse SA-DWT on the
.I matrix
field of
.IR subband_pyramid .
The number of levels of the inverse transform is retrieved from the
.I num_levels
field of
.IR subband_pyramid ;
.I num_levels
is set to 0 upon return of
.BR QccWAVSubbandPyramidInverseShapeAdaptiveDWT() .
.I mask
should be the Lazy-wavelet transformed mask that was output by
.BR QccWAVWaveletSubbandPyramidShapeAdaptiveDWT() .
Upon return from
.BR QccWAVSubbandPyramidInverseShapeAdaptiveDWT() ,
.I mask
is the original transparency mask; i.e., the mask that
indicates where valid data resides in the original spatial domain.
.SH "RETURN VALUES"
These routines
return 0 on success and 1 on error.
.SH "SEE ALSO"
.BR QccWAVWaveletShapeAdaptiveDWT2D (3),
.BR QccWAVWaveletInversShapeAdaptiveDWT2D (3),
.BR QccWAVWavelet (3),
.BR QccPackWAV (3),
.BR QccPack (3)
.LP
S. Li and W. Li, "Shape-Adaptive Discrete Wavelet Transforms for
Arbitrarily Shaped Visual Object Coding,"
.IR "IEEE Transactions on Circuits and Systems for Video Coding" ,
vol. 10, pp. 725-743, August 2000.
.LP
ISO/IEC 14496-2, "Information Technology -- Coding of audio-visual objects --
Part 2: Visual," 
.IR "MPEG-4 Standard" ,
Amendment 1, July 2000.
.SH AUTHOR
Copyright (C) 1997-2009  James E. Fowler
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