dwt.h File Reference

Implementation of a discrete wavelet transform (DWT). More...

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Functions

Exported functions
void dwt_encode (opj_tcd_tilecomp_t *tilec)
 Forward 5-3 wavelet tranform in 2-D.
void dwt_decode (opj_tcd_tilecomp_t *tilec, int numres)
 Inverse 5-3 wavelet tranform in 2-D.
int dwt_getgain (int orient)
 Get the gain of a subband for the reversible 5-3 DWT.
double dwt_getnorm (int level, int orient)
 Get the norm of a wavelet function of a subband at a specified level for the reversible 5-3 DWT.
void dwt_encode_real (opj_tcd_tilecomp_t *tilec)
 Forward 9-7 wavelet transform in 2-D.
void dwt_decode_real (opj_tcd_tilecomp_t *tilec, int numres)
 Inverse 9-7 wavelet transform in 2-D.
int dwt_getgain_real (int orient)
 Get the gain of a subband for the irreversible 9-7 DWT.
double dwt_getnorm_real (int level, int orient)
 Get the norm of a wavelet function of a subband at a specified level for the irreversible 9-7 DWT.
void dwt_calc_explicit_stepsizes (opj_tccp_t *tccp, int prec)
 Explicit calculation of the Quantization Stepsizes.


Detailed Description

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.


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