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

       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

       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)

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

       Options usable only if the library has been compiled with BUILD_JPWL-Wc[=Nc] (Nc is the number of expected components in the codestream; default:3)

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

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

       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 .

-iname
              (jpeg2000 input file name)

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

       -oname
              (output file name with extension)

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

       -xname
              (use name as index file and fill it)

       -ImgDirdirectory_name
              (directory containing input files)

       -OutForext
              (extension for output files)

       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.

opj_compress(1) opj_dump(1)

opj_decompress                                    Version 2.1.1                                opj_decompress(1)

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

       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.