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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 .TH jbig2dec 1 "2023 May 19" "Version 0.20" "jbig2dec Manual"
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2
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3 .SH NAME
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4 jbig2dec \- File format converter specialized in JBIG2 decoding
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6 .SH SYNOPSIS
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7 .B jbig2dec
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8 .RI [ options ]
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9 .I file.jbig2
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10 .br
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11 .B jbig2dec
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12 .RI [ options ]
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13 .I global-stream page-stream
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15 .SH DESCRIPTION
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16 The
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17 .B jbig2dec
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18 command converts JBIG2 files to png or pbm files.
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19
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20 When passed a single
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21 .I file
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22 argument it is interpreted as a JBIG2 file stream, with either
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23 sequential or random-access organization.
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24
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25 When passed two stream arguments, they are interpreted as the
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26 global and page-specific portions of an embedded organization,
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27 as used in PDF. If a particular page references no global
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28 segment stream, /dev/null can be passed for the
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29 .I global-stream
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30 argument to request the embedded parser.
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32 .SH OPTIONS
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33 The options are as follows:
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34 .TP
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35 .BR -e ", " --embedded
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36 Expect embedded bit stream without file header.
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37 .TP
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38 .BI -o " file" ", --output" " file"
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39 Store the decoded output in
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40 .IR file .
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41 Defaults to the input with a different extension.
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42 Set to \fI-\fR for standard output.
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43 .TP
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44 .BI -t " type" ", --format" " type"
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45 Force a particular output file format. Supported are \fIpng\fR and
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46 \fIpbm\fR.
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47 .TP
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48 .BR -d ", " --dump
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49 Print the structure of the JBIG2 file rather than explicitly decoding it.
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50 .TP
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51 .BR -m ", " --hash
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52 Print a hash of the decoded document.
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53 .TP
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54 .BR -q ", " --quiet
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55 Suppress warnings and other diagnostic output.
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56 .TP
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57 .BR -v ", " --verbose
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58 Report additional information about the decoding process.
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59 Pass just \fB-v\fR for information about the file as it's being decoded.
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60 This is the same as \fB--verbose=2\fR.
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61 Pass \fB--verbose=3\fR or higher for debugging information.
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62 .TP
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63 .BR -V ", " --version
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64 Show program version information.
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65 .TP
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66 .BR -h ", " --help
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67 Show usage summary.
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68
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69 .SH REPORTING BUGS
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70 Report bugs at https://bugs.ghostscript.com
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71
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72 Contact the developers on Discord: https://discord.gg/taPnFQp5gb
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73 or via the mailing list <gs-devel@ghostscript.com>.
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74
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75 .SH AUTHOR
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76 This manpage was initially written by Sebastian Rasmussen
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77 <sebras@gmail.com> for jbig2dec and the Debian Project.