223 lines
6.1 KiB
Groff
223 lines
6.1 KiB
Groff
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'\" Replacement em-dash for nroff (default is too short).
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'\" Placeholder macro for if longer nroff arrow is needed.
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.TH opj_compress 1 "Version 1.4.0" "opj_compress" "converts to jpeg2000 files"
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.P
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.SH NAME
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opj_compress -
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This program reads in an image of a certain type and converts it to a
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jpeg2000 file. 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 .bmp, .pgm, .pgx, .png, .pnm, .ppm, .raw, .tga, .tif \fR. For PNG resp. TIF it needs libpng resp. libtiff .
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.SP
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Valid output image extensions are
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.B .j2k, .jp2
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.SH SYNOPSIS
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.P
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.B opj_compress -i \fRinfile.bmp \fB-o \fRoutfile.j2k
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.P
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.B opj_compress -ImgDir \fRdirectory_name \fB-OutFor \fRjp2
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.P
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.B opj_compress -h \fRPrint a help message and exit.
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.P
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.R See JPWL OPTIONS for special options
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.SH OPTIONS
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.TP
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.B \-\^b " n,n"
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(Size of code block (e.g. -b 32,32). Default: 64 x 64)
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.TP
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.B \-\^c " n"
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(Size of precinct (e.g. -c 128,128). Default: 2^15 x 2^15)
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.TP
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.B \-\^cinema2K " fps"
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Digital Cinema 2K profile compliant codestream. Valid \fBfps\fR values are 24 or 48.
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.TP
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.B \-\^cinema4K
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Digital Cinema 4K profile compliant codestream. Does not need an fps: default is 24 fps.
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.TP
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.B \-\^d " X,Y"
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(Offset of image origin (e.g. -d 150,300))
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.TP
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.B \-\^h
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Print a help message and exit.
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.TP
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.B \-\^i " name"
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(input file name)
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.TP
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.B \-\^n " n"
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(Number of resolutions. Default: 6)
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.TP
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.B \-\^o " name"
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(output file name)
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.TP
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.B \-\^p " name"
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Progression order. \fBname\fR can be one out of:LRCP, RLCP, RPCL, PCRL, CPRL. Default: LRCP.
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.TP
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.B \-\^q " n"
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different psnr for successive layers
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.br
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.B Note: \fR(options -r and -q cannot be used together)
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.TP
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.B \-\^r " n"
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different compression ratio(s) for successive layers. The rate specified for each quality level is the desired compression factor.
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.br
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.B Note: \fR(options -r and -q cannot be used together)
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.TP
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.B \-\^s " X,Y"
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sub-sampling factor (e.g. -s 2,2). Default: No sub-sampling in x or y direction.
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.br
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.B Remark: \fRsub-sampling bigger than 2 can produce errors.
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.TP
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.B \-\^t " W,H"
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(Size of tile (e.g. -t 512,512) )
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.TP
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.B \-\^x " name"
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(Create index file and fill it. Default: no index file)
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.TP
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.B \-\^EPH
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(Write EPH marker after each header packet. Default:no EPH)
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.TP
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.B \-\^F " rawWidth,rawHeight,rawComp,rawBitDepth,s_or_u"
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characteristics of the raw input image
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.TP
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.B \-\^I
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(Use the irreversible DWT 9-7. Default: Reversible DWT 5-3)
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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 \-\^M " n"
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mode switch with values: 1, 2, 4, 8, 16, 32. Default:No mode switch activated.
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.br
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\fIMeaning:\fR
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.br
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BYPASS(1)
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.br
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RESET(2)
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.br
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RESTART(4)
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.br
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VSC(8)
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.br
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ERTERM(16)
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.br
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SEGMARK(32)
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.br
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Values can be added: RESTART(4) + RESET(2) + SEGMARK(32) = -M 38
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.TP
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.B \-\^OutFor "ext"
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(extension for output files)
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.TP
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.B \-\^POC "TtileNr=resolutionStart, componentStart, layerEnd, resolutionEnd, componentEnd, progressionOrder"
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(see Examples)
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.TP
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.B \-\^ROI "c=n,U=n"
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quantization indices upshifted for component c (0 or 1 or 2) with a value of U (>= 0 and <= 37)
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.br
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e.g. \fB-ROI c=0,U=25\fR
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.TP
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.B \-\^SOP
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(Write SOP marker before each packet. Default: No SOP marker in the codestream.)
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.TP
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.B \-\^T "X,Y"
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(Offset of the origin of the tiles (e.g. -T 100,75) )
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.TP
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.B \-\^W
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(see JPWL OPTIONS)
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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 \fB-DUSE_JPWL\fR
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.P
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.B -W h<tilepart><=type>, s<tilepart><=method>, a=<addr>, z=<size>, g=<range>, p<tilepart:pack><=type>
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.P
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.B h\fR selects the header error protection (EPB): \fBtype\fR can be
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[0=none 1,absent=predefined 16=CRC-16 32=CRC-32 37-128=RS]
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if \fBtilepart\fR is absent, it is for main and tile headers
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if \fBtilepart\fR is present, it applies from that tile
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onwards, up to the next h<> spec, or to the last tilepart
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in the codestream (max. 16 specs)
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.P
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.B p \fRselects the packet error protection (EEP/UEP with EPBs)
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to be applied to raw data: \fBtype\fR can be
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[0=none 1,absent=predefined 16=CRC-16 32=CRC-32 37-128=RS]
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if \fBtilepart:pack\fR is absent, it is from tile 0, packet 0
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if \fBtilepart:pack\fR is present, it applies from that tile
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and that packet onwards, up to the next packet spec
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or to the last packet in the last tilepart in the stream
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(max. 16 specs)
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.P
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.B s \fRenables sensitivity data insertion (ESD): \fBmethod\fR can be
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[-1=NO ESD 0=RELATIVE ERROR 1=MSE 2=MSE REDUCTION 3=PSNR
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4=PSNR INCREMENT 5=MAXERR 6=TSE 7=RESERVED]
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if \fBtilepart\fR is absent, it is for main header only
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if \fBtilepart\fR is present, it applies from that tile
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onwards, up to the next s<> spec, or to the last tilepart
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in the codestream (max. 16 specs)
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.P
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.B g \fRdetermines the addressing mode: \fBrange\fR can be
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[0=PACKET 1=BYTE RANGE 2=PACKET RANGE]
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.P
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.B a \fRdetermines the size of data addressing: \fBaddr\fR can be
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2/4 bytes (small/large codestreams). If not set, auto-mode
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.P
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.B z \fRdetermines the size of sensitivity values: \fBsize\fR can be
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1/2 bytes, for the transformed pseudo-floating point value
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.P
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.SH EXAMPLES
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.P
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.B opj_compress -i \fRfile.bmp \fB-o \fRfile.j2k \fB-r \fR20,10,1 (compress 20x, then 10x, then lossless).
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.P
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.B opj_compress -i \fRfile.ppm \fB-o \fRfile.j2k \fB-q \fR30,40,50
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.P
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.B opj_compress -i \fRfile.pgx \fB-o \fRfile.j2k \fB-POC \fRT1=0,0,1,5,3,CPRL
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.P
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.B opj_compress -i \fRlena.raw \fB-o \fRlena.j2k \fB-F \fR512,512,3,8,u
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.P
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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_decompress(1) opj_dump(1)
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