NAME
mgbilevel - compresses a bilevel image using a specified template
SYNOPSIS
mgbilevel -e [ -t "" "string" ] infile [ >compressed-outfile ]
or
mgbilevel -d compressed-infile [ >outfile ]
DESCRIPTION
mgbilevel performs (up to) a two-stage template-based compression. The user can specify the template to be used in the compression process. The default template size is a two-stage template 22/10. The compressed file contains the template type in the stream. The output files are written to stdout.
OPTIONS
Options may appear in any order. 312.sp 40u
- -h
- This displays a usage line on stderr.
- -e
- Compresses infile using a template specified, and writes to compressed-outfile.
- -d
- Decompresses compressed-infile using the template contained in the compressed file. Writes to outfile.
- -t "string"
- This option specifies which template combination is to be used in the compression. Five different characters can occur in the string: `.' for a pixel not included in the template, `p' for a pixel included in the 1st level template, `2' for a pixel included in the 2nd level template (a subset of the 1st level), `*' denoting the position of the current pixel, and a `;' denoting the end of each template line. The default template is a two-level 22/10 template:
- .ppppp.;
- pp222pp; p22222p; p22*...;
infile
This is the input .pbm file to be compressed.
outfile
This is the decompressed .pbm file.
SEE ALSO
mg(1), mg_compression_dict(1), mg_fast_comp_dict(1), mg_get(1), mg_invf_dict(1), mg_invf_dump(1), mg_invf_rebuild(1), mg_passes(1), mg_perf_hash_build(1), mg_text_estimate(1), mg_weights_build(1), mgbuild(1), mgdictlist(1), mgfelics(1), mgquery(1), mgstat(1), mgtic(1), mgticbuild(1), mgticdump(1), mgticprune(1), mgticstat(1).