SYNOPSIS

opj_decompress -i infile.j2k -o outfile.png

opj_decompress -ImgDir images/ -OutFor bmp

opj_decompress -h Print help message and exit

OPTIONS

-i name

(jpeg2000 input file name)

-l n

n is the maximum number of quality layers to decode. See LAYERS below)

-o name

(output file name with extension)

-r n

(n is the highest resolution level to be discarded. See REDUCTION below)

-x name

(use name as index file and fill it)

-ImgDir directory_name

(directory containing input files)

-OutFor ext

(extension for output files)

JPWL OPTIONS

Options usable only if the library has been compiled with -DUSE_JPWL

-W c[=Nc] (Nc is the number of expected components in the codestream; default:3)

-W t[=Nt] (Nt is the maximum number of tiles in the codestream; default:8192)

-W c[=Nc], t[=Nt] (same as above)

REDUCTION

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.

TILES

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.

AUTHORS

Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
Copyright (c) 2002-2014, Professor Benoit Macq
Copyright (c) 2001-2003, David Janssens
Copyright (c) 2002-2003, Yannick Verschueren
Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
Copyright (c) 2005, Herve Drolon, FreeImage Team
Copyright (c) 2006-2007, Parvatha Elangovan