/* | |
* Copyright (c) 2001-2003, David Janssens | |
* Copyright (c) 2002-2003, Yannick Verschueren | |
* Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe | |
* Copyright (c) 2005, Herve Drolon, FreeImage Team | |
* Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium | |
* Copyrigth (c) 2006, Mónica Díez, LPI-UVA, Spain | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
* POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
#ifndef __DWT_H | |
#define __DWT_H | |
/** | |
@file dwt.h | |
@brief Implementation of a discrete wavelet transform (DWT) | |
The functions in DWT.C have for goal to realize forward and inverse discret wavelet | |
transform with filter 5-3 (reversible) and filter 9-7 (irreversible). The functions in | |
DWT.C are used by some function in TCD.C. | |
*/ | |
/** @defgroup DWT DWT - Implementation of a discrete wavelet transform */ | |
/*@{*/ | |
/** | |
DCCS-LIWT properties | |
*/ | |
typedef struct opj_wtfilt { | |
double *LPS; | |
int lenLPS; | |
double *HPS; | |
int lenHPS; | |
} opj_wtfilt_t; | |
/** @name Funciones generales */ | |
/*@{*/ | |
/* ----------------------------------------------------------------------- */ | |
/** | |
Forward 5-3 wavelet tranform in 3-D. | |
Apply a reversible DWT transform to a component of an volume. | |
@param tilec Tile component information (current tile) | |
@param dwtid Number of identification of wavelet kernel(s) used in DWT in each direction | |
*/ | |
void dwt_encode(opj_tcd_tilecomp_t * tilec, int dwtid[3]); | |
/** | |
Inverse 5-3 wavelet tranform in 3-D. | |
Apply a reversible inverse DWT transform to a component of an volume. | |
@param tilec Tile component information (current tile) | |
@param stops Number of decoded resolution levels in each dimension | |
@param dwtid Number of identification of wavelet kernel(s) used in DWT in each dimension | |
*/ | |
void dwt_decode(opj_tcd_tilecomp_t * tilec, int stops[3], int dwtid[3]); | |
/* ----------------------------------------------------------------------- */ | |
/** | |
Get the gain of a subband for the reversible 3-D DWT. | |
@param orient Number that identifies the subband (0->LLL, 1->HLL, 2->LHL, 3->HHL, 4->LLH, 5->HLH, 6->LHH, 7->HHH) | |
@param reversible Wavelet transformation type | |
@return Returns 0 if orient = 0, returns 1 if orient = 1,2 or 4, returns 2 if orient = 3,5 or 6, returns 3 otherwise | |
*/ | |
int dwt_getgain(int orient, int reversible); | |
/** | |
Get the norm of a wavelet function of a subband at a specified level for the reversible 5-3 DWT or irreversible 9-7 in 3-D. | |
@param orient Band of the wavelet function | |
@param level Levels of the wavelet function in X,Y,Z axis | |
@param dwtid Wavelet transformation identifier | |
@return Returns the norm of the wavelet function | |
*/ | |
double dwt_getnorm(int orient, int level[3], int dwtid[3]); | |
/* ----------------------------------------------------------------------- */ | |
/** | |
Calcula el valor del escalón de cuantificación correspondiente a cada subbanda. | |
@param tccp Tile component coding parameters | |
@param prec Precision of data | |
*/ | |
void dwt_calc_explicit_stepsizes(opj_tccp_t * tccp, int prec); | |
/*@}*/ | |
#endif /* __DWT_H */ |