opj_dparameters Struct Reference

Decompression parameters. More...

#include <openjpeg.h>

Data Fields
OPJ_UINT32	cp_reduce
	Set the number of highest resolution levels to be discarded.
OPJ_UINT32	cp_layer
	Set the maximum number of quality layers to decode.
unsigned int	flags
command line decoder parameters (not used inside the library)

char	infile [OPJ_PATH_LEN]
	input file name
char	outfile [OPJ_PATH_LEN]
	output file name
int	decod_format
	input file format 0: J2K, 1: JP2, 2: JPT
int	cod_format
	output file format 0: PGX, 1: PxM, 2: BMP
OPJ_UINT32	DA_x0
	Decoding area left boundary.
OPJ_UINT32	DA_x1
	Decoding area right boundary.
OPJ_UINT32	DA_y0
	Decoding area up boundary.
OPJ_UINT32	DA_y1
	Decoding area bottom boundary.
OPJ_BOOL	m_verbose
	Verbose mode.
OPJ_UINT32	tile_index
	tile number ot the decoded tile
OPJ_UINT32	nb_tile_to_decode
	Nb of tile to decode.
JPWL decoding parameters

OPJ_BOOL	jpwl_correct
	activates the JPWL correction capabilities
int	jpwl_exp_comps
	expected number of components
int	jpwl_max_tiles
	maximum number of tiles

Detailed Description

Decompression parameters.

Field Documentation

int opj_dparameters::cod_format

output file format 0: PGX, 1: PxM, 2: BMP

Referenced by opj_set_default_decoder_parameters().

OPJ_UINT32 opj_dparameters::cp_layer

Set the maximum number of quality layers to decode.

If there are less quality layers than the specified number, all the quality layers are decoded. if != 0, then only the first "layer" layers are decoded; if == 0 or not used, all the quality layers are decoded

Referenced by opj_j2k_setup_decoder(), and opj_set_default_decoder_parameters().

OPJ_UINT32 opj_dparameters::cp_reduce

Set the number of highest resolution levels to be discarded.

The image resolution is effectively divided by 2 to the power of the number of discarded levels. The reduce factor is limited by the smallest total number of decomposition levels among tiles. if != 0, then original dimension divided by 2^(reduce); if == 0 or not used, image is decoded to the full resolution

Referenced by opj_j2k_setup_decoder(), and opj_set_default_decoder_parameters().

OPJ_UINT32 opj_dparameters::DA_x0

Decoding area left boundary.

Referenced by j2k_to_pnm().

OPJ_UINT32 opj_dparameters::DA_x1

Decoding area right boundary.

Referenced by j2k_to_pnm().

OPJ_UINT32 opj_dparameters::DA_y0

Decoding area up boundary.

Referenced by j2k_to_pnm().

OPJ_UINT32 opj_dparameters::DA_y1

Decoding area bottom boundary.