NAME

       opj_decompress  -  This program reads in a jpeg2000 image and converts it to another image
       type. It is part of the OpenJPEG library.

       Valid input image extensions are .j2k, .jp2, .j2c, .jpt

       Valid output image extensions are .bmp, .pgm, .pgx, .png, .pnm, .ppm, .raw, .tga,  .tif  .
       For PNG resp. TIF it needs libpng resp. libtiff .

SYNOPSIS

       opj_decompress -i infile.j2k -o outfile.png

       opj_decompress -ImgDir images/ -OutFor bmp

       opj_decompress -h Print help message and exit

       See JPWL OPTIONS for special options

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)

JPIP OPTIONS

       Options usable only if the library has been compiled with BUILD_JPIP

       -jpip  Embed index table box into the output JP2 file (compulsory for JPIP)

       -TP R  Partition  a  tile  into  tile parts of different resolution levels (compulsory for
              JPT-stream)

JPWL OPTIONS

       Options usable only if the library has been compiled with BUILD_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

SEE ALSO

       opj_compress(1) opj_dump(1)