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+\
+.\" This man page was generated by the Netpbm tool 'makeman' from HTML source.
+.\" Do not hand-hack it! If you have bug fixes or improvements, please find
+.\" the corresponding HTML page on the Netpbm website, generate a patch
+.\" against that, and send it to the Netpbm maintainer.
+.TH "Jbigtopnm User Manual" 0 "19 November 2003" "netpbm documentation"
+
+.UN lbAB
+.SH NAME
+jbigtopnm - JBIG to PNM image file converter
+
+.UN lbAC
+.SH SYNOPSIS
+
+\fBjbigtopnm\fP
+[\fIoptions\fP]
+[\fIinput-file\fP [\fIoutput-file\fP]]
+
+.UN lbAD
+.SH DESCRIPTION
+.PP
+This program is part of
+.BR "Netpbm" (1)\c
+\&.
+.PP
+\fBjbigtopnm\fP reads a JBIG bi-level image entity (BIE) from a
+file or standard input, decompresses it, and outputs a PBM or PGM
+file. If the input has one plane, or you choose just one plane of it,
+the output is PBM. Otherwise, the output is PGM.
+.PP
+JBIG is a highly effective lossless compression algorithm for
+bi-level images (one bit per pixel), which is particularly suitable
+for scanned document pages.
+.PP
+A JBIG encoded image can be stored in several resolutions in one or
+several BIEs. All resolution layers except the lowest one are stored
+efficiently as differences to the next lower resolution layer. You
+can use options \fB-x\fP and \fB-y\fP to stop the decompression at a
+specified maximal output image size. The input file can consist of
+several concatenated BIEs which contain different increasing
+resolution layers of the same image.
+
+.UN lbAE
+.SH OPTIONS
+
+
+
+.TP
+\fB-x\fP \fInumber\fP
+Decode only up to the largest resolution layer which is still not
+more than \fInumber\fP pixels wide. If no such resolution layer
+exists, then use the smallest one available.
+
+.TP
+\fB-y\fP\fI number\fP
+Decode only up to the largest resolution layer which is still not
+more than \fInumber\fP pixels high. If no such resolution layer
+exists, then use the smallest one available. You can also use options
+\fB-x\fP and \fB-y\fP together which selects the largest layer that
+satisfies both limits.
+
+.TP
+\fB-b\fP
+Use binary values instead of Gray code words in order to decode
+pixel values from multiple bitplanes. This option has effect only if
+the input has more than one bitplane and you don't select just one of
+those bitplanes. Note that the decoder has to be used in the same
+mode as the encoder and cannot determine from the BIE, whether Gray or
+binary code words were used by the encoder.
+
+.TP
+\fB-d\fP
+Diagnose a BIE. With this option, \fBjbigtopnm\fP only prints a
+summary of the header information found in the input file and then
+exits.
+
+.TP
+\fB-p\fP\fI number\fP
+If the input contains multiple bitplanes, then extract only the
+specified single plane as a PBM file. The first plane has number 0.
+
+
+
+.UN lbAF
+.SH STANDARDS
+.PP
+This program implements the JBIG image coding algorithm as
+specified in ISO/IEC 11544:1993 and ITU-T T.82(1993).
+
+.UN lbAG
+.SH AUTHOR
+
+
+.PP
+\fBjbigtopnm\fP is based on the JBIG library by Markus Kuhn, part
+of his
+.UR http://www.cl.cam.ac.uk/~mgk25/jbigkit/
+\fBJBIG-KIT\fP package
+.UE
+\&. The \fBjbgtopbm\fP program is part of the
+\fBJBIG-KIT\fP package.
+.PP
+\fBjbigtopnm\fP is part of the Netpbm package of graphics tools.
+
+.UN lbAH
+.SH SEE ALSO
+.BR "pnm" (5)\c
+\&,
+.BR "pnmtojbig" (1)\c
+\&
+
+.UN lbAI
+.SH LICENSE
+
+If you use \fBjbigtopnm\fP, you are using various patents,
+particularly on its arithmetic encoding method, and in all probability
+you do not have a license from the patent owners to do so.
+.SH DOCUMENT SOURCE
+This manual page was generated by the Netpbm tool 'makeman' from HTML
+source. The master documentation is at
+.IP
+.B http://netpbm.sourceforge.net/doc/jbigtopnm.html
+.PP \ No newline at end of file