120 lines
3.1 KiB
Groff
120 lines
3.1 KiB
Groff
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'\" t
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'\" The line above instructs most `man' programs to invoke tbl
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'\"
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'\" Separate paragraphs; not the same as PP which resets indent level.
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.de SP
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.if t .sp .5
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.if n .sp
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..
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'\"
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'\" Replacement em-dash for nroff (default is too short).
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.ie n .ds m " -
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.el .ds m \(em
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'\"
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'\" Placeholder macro for if longer nroff arrow is needed.
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.ds RA \(->
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'\"
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'\" Decimal point set slightly raised
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.if t .ds d \v'-.15m'.\v'+.15m'
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.if n .ds d .
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'\"
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'\" Enclosure macro for examples
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.de EX
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.SP
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.nf
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.ft CW
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..
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.de EE
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.ft R
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.SP
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.fi
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..
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.TH opj_decompress 1 "Version 2.1.1" "opj_decompress" "converts jpeg2000 files"
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.P
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.SH NAME
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opj_decompress \-
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This program reads in a jpeg2000 image and converts it to another
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image type. It is part of the OpenJPEG library.
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.SP
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Valid input image extensions are
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.B .j2k, .jp2, .j2c, .jpt
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.SP
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Valid output image extensions are
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.B .bmp, .pgm, .pgx, .png, .pnm, .ppm, .raw, .tga, .tif \fR. For PNG resp. TIF it needs libpng resp. libtiff .
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.SH SYNOPSIS
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.P
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.B opj_decompress \-i \fRinfile.j2k \fB-o \fRoutfile.png
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.P
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.B opj_decompress \-ImgDir \fRimages/ \fB-OutFor \fRbmp
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.P
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.B opj_decompress \-h \fRPrint help message and exit
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.P
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See JPWL OPTIONS for special options
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.SH OPTIONS
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.TP
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.B \-\^i "name"
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(jpeg2000 input file name)
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.TP
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.B \-\^l "n"
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n is the maximum number of quality layers to decode. See LAYERS below)
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.TP
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.B \-\^o "name"
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(output file name with extension)
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.TP
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.B \-\^r "n"
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(n is the highest resolution level to be discarded. See REDUCTION below)
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.TP
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.B \-\^x "name"
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(use name as index file and fill it)
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.TP
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.B \-\^ImgDir "directory_name"
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(directory containing input files)
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.TP
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.B \-\^OutFor "ext"
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(extension for output files)
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.P
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.SH JPIP OPTIONS
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Options usable only if the library has been compiled with
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.B BUILD_JPIP
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.TP
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.B -jpip
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Embed index table box into the output JP2 file (compulsory for JPIP)
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.TP
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.B -TP R
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Partition a tile into tile parts of different resolution levels (compulsory for JPT-stream)
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.P
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.SH JPWL OPTIONS
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Options usable only if the library has been compiled with
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.B BUILD_JPWL
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.TP
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.B -W c\fR[=Nc] (Nc is the number of expected components in the codestream; default:3)
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.TP
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.B -W t\fR[=Nt] (Nt is the maximum number of tiles in the codestream; default:8192)
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.TP
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.B -W c\fR[=Nc]\fB, t\fR[=Nt] \fR(same as above)
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.P
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.SH REDUCTION
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Set the number of highest resolution levels to be discarded.
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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.
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.SH TILES
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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.
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.P
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'\".SH BUGS
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.SH AUTHORS
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Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
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.br
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Copyright (c) 2002-2014, Professor Benoit Macq
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.br
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Copyright (c) 2001-2003, David Janssens
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.br
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Copyright (c) 2002-2003, Yannick Verschueren
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.br
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Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
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.br
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Copyright (c) 2005, Herve Drolon, FreeImage Team
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.br
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Copyright (c) 2006-2007, Parvatha Elangovan
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.P
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.SH "SEE ALSO"
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opj_compress(1) opj_dump(1)
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