Jbigtopnm User Manual(1) | General Commands Manual | Jbigtopnm User Manual(1) |
jbigtopnm - JBIG to PNM image file converter
jbigtopnm [-xmax] [-ymax] [-binary] [-diagnose] [-plane] [input-file [output-file]]
Minimum unique abbreviation of option is acceptable. You may use double hyphens instead of single hyphen to denote options. You may use white space in place of the equals sign to separate an option name from its value.
This program is part of Netpbm(1).
jbigtopnm 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.
JBIG is a highly effective lossless compression algorithm for bi-level images (one bit per pixel), which is particularly suitable for scanned document pages.
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 -x and -y 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.
In addition to the options common to all programs based on
libnetpbm (most notably -quiet, see
Common Options ), jbigtopnm recognizes the following command line
options:
Before Netpbm 10.85 (December 2018), only single-character single-hyphen abbreviations of the options are accepted.
This program implements the JBIG image coding algorithm as specified in ISO/IEC 11544:1993 and ITU-T T.82(1993).
jbigtopnm is based on the JBIG library by Markus Kuhn, part of his JBIG-KIT package . The jbgtopbm program is part of the JBIG-KIT package.
jbigtopnm is part of the Netpbm package of graphics tools.
There was at one time concern about the need for patent licenses to use jbigtopnm, but any relevant patents expired by 2012.
This manual page was generated by the Netpbm tool 'makeman' from HTML source. The master documentation is at
28 July 2020 | netpbm documentation |