Wavelet Transform Functions

This section describes the wavelet transform functions that are specific for JPEG 2000 image coding system (see [ISO15444]). These functions are listed in the Table “Wavelet Transform Functions”.

Wavelet Transform Functions
Function Base Name	Description
Low-Level Operations
WTFwdRow_B53_JPEG2K	Performs a row oriented forward wavelet transform with reversible filter.
WTInvRow_B53_JPEG2K	Performs a row oriented inverse wavelet transform with reversible filter.
WTFwdCol_B53_JPEG2K	Performs a forward wavelet transform with reversible filter of image columns.
WTFwdColLift_B53_JPEG2K	Performs a single step of forward wavelet transform with reversible filter of image columns.
WTInvCol_B53_JPEG2K	Performs a column oriented inverse wavelet transform with reversible filter.
WTInvColLift_B53_JPEG2K	Performs a single step of inverse wavelet transform with reversible filter of image columns.
WTFwdRow_D97_JPEG2K	Performs a row oriented forward wavelet transform with irreversible filter.
WTInvRow_D97_JPEG2K	Performs a row oriented inverse wavelet transform with irreversible filter.
WTFwdCol_D97_JPEG2K	Performs a column oriented forward wavelet transform with irreversible filter.
WTFwdColLift_D97_JPEG2K	Performs a single step of forward wavelet transform with irreversible filter of image columns.
WTInvCol_D97_JPEG2K	Performs a column oriented inverse wavelet transform with irreversible filter.
WTInvColLift_D97_JPEG2K	Performs a single step of inverse wavelet transform with irreversible filter of image columns.
Tile-Oriented Transforms
WTGetBufSize_B53_JPEG2K	Computes the size of the buffer for a tile-oriented wavelet transform
WTFwd_B53_JPEG2K	Performs a tile-oriented forward wavelet transform.
WTInv_B53_JPEG2K	Performs a tile-oriented inverse wavelet transform.
WTGetBufSize_D97_JPEG2K	Computes the size of the buffer for a tile-oriented wavelet transform
WTFwd_D97_JPEG2K	Performs a tile-oriented forward wavelet transform.
WTInv_D97_JPEG2K	Performs a tile-oriented inverse wavelet transform.