| 1 | .\"------------------------------------------------------------
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| 2 | .\" Id - set Rv,revision, and Dt, Date using rcs-Id tag.
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| 3 | .de Id
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| 4 | .ds Rv \\$3
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| 5 | .ds Dt \\$4
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| 6 | ..
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| 7 | .Id $Id: mgbilevel.1 3745 2003-02-20 21:20:24Z mdewsnip $
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| 8 | .\"------------------------------------------------------------
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| 9 | .TH mgbilevel 1 \*(Dt CITRI
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| 10 | .SH NAME
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| 11 | mgbilevel \- compresses a bilevel image using a specified template
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| 12 | .SH SYNOPSIS
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| 13 | .B mgbilevel
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| 14 | .B \-e
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| 15 | [
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| 16 | .B \-t
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| 17 | .I \*(lqstring\*(rq
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| 18 | ]
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| 19 | .I infile
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| 20 | [
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| 21 | .I \>compressed-outfile
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| 22 | ]
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| 23 | .nf
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| 24 | or
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| 25 | .fi
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| 26 | .B mgbilevel
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| 27 | .B \-d
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| 28 | .I compressed-infile
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| 29 | [
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| 30 | .I \>outfile
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| 31 | ]
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| 32 | .SH DESCRIPTION
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| 33 | .B mgbilevel
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| 34 | performs (up to) a two-stage template-based compression. The
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| 35 | user can specify the template to be used in the compression process. The
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| 36 | default template size is a two-stage template 22/10. The compressed file
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| 37 | contains the template type in the stream. The output files are written
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| 38 | to
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| 39 | .IR stdout .
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| 40 | .SH OPTIONS
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| 41 | Options may appear in any order.
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| 42 | .TP "\w'\fB\-t\fP \fI\*(lqstring\*(rq\fP'u+2n"
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| 43 | .B \-h
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| 44 | This displays a usage line on
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| 45 | .IR stderr .
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| 46 | .TP
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| 47 | .B \-e
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| 48 | Compresses
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| 49 | .I infile
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| 50 | using a template specified, and writes to
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| 51 | .IR compressed-outfile .
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| 52 | .TP
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| 53 | .B \-d
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| 54 | Decompresses
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| 55 | .I compressed-infile
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| 56 | using the template contained in the compressed file. Writes to
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| 57 | .IR outfile .
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| 58 | .TP
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| 59 | \fB\-t \fP\fI\*(lqstring\*(rq\fP
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| 60 | This option specifies which template combination is to
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| 61 | be used in the compression. Five different characters
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| 62 | can occur in the string: `.' for a pixel not
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| 63 | included in the template, `p' for a pixel included in the 1st
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| 64 | level template, `2' for a pixel included in the 2nd level
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| 65 | template (a subset of the 1st level), `*' denoting the position
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| 66 | of the
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| 67 | .I current
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| 68 | pixel, and a `;' denoting the end of each template line.
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| 69 | The default template is a two-level 22/10 template:
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| 70 | .IP
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| 71 | .RS
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| 72 | .nf
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| 73 | \&.ppppp.;
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| 74 | pp222pp;
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| 75 | p22222p;
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| 76 | p22*.\|.\|.;
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| 77 | .fi
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| 78 | .RE
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| 79 | .IP
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| 80 | This would be specified on the command line as:
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| 81 | .nf
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| 82 | \&\fB\-T\fP ".ppppp.;pp222pp;p22222p;p22*.\|.\|.;"
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| 83 | .fi
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| 84 | .TP
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| 85 | .I infile
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| 86 | This is the input
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| 87 | .I .pbm
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| 88 | file to be compressed.
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| 89 | .TP
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| 90 | .I outfile
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| 91 | This is the decompressed
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| 92 | .I .pbm
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| 93 | file.
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| 94 | .SH "SEE ALSO"
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| 95 | .na
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| 96 | .BR mg (1),
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| 97 | .BR mg_compression_dict (1),
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| 98 | .BR mg_fast_comp_dict (1),
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| 99 | .BR mg_get (1),
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| 100 | .BR mg_invf_dict (1),
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| 101 | .BR mg_invf_dump (1),
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| 102 | .BR mg_invf_rebuild (1),
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| 103 | .BR mg_passes (1),
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| 104 | .BR mg_perf_hash_build (1),
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| 105 | .BR mg_text_estimate (1),
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| 106 | .BR mg_weights_build (1),
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| 107 | .BR mgbuild (1),
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| 108 | .BR mgdictlist (1),
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| 109 | .BR mgfelics (1),
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| 110 | .BR mgquery (1),
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| 111 | .BR mgstat (1),
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| 112 | .BR mgtic (1),
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| 113 | .BR mgticbuild (1),
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| 114 | .BR mgticdump (1),
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| 115 | .BR mgticprune (1),
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| 116 | .BR mgticstat (1).
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