This is the command opj_decompress that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
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)
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
Use opj_decompress online using onworks.net services
