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This is the command compface that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



compface, uncompface - compress and expand 48x48x1 face image files


compface [ infile [ outfile ] ] ...

uncompface [-X] [ infile [ outfile ] ] ...


compface is a filter for generating highly compressed representations of 48x48x1 face
image files. uncompface is an inverse filter which performs an inverse transformation
with no loss of data. The algorithm used is highly tuned for its purpose and achieves
better than a five to one compression ratio on average. Arguments operate identically for
both programmes. The first argument, if present, causes input to be taken from the named
file instead of from standard input unless it is the string ``-''. A second argument, if
present, causes output to go to the named file instead of to standard output unless it is
the string ``-''. Subsequent pairs of arguments may be used to specify further pairs of
input and output files.

The input format for compface (and the output format for uncompface) is 48 lines each of 3
sixteen bit hexadecimal integers, comma terminated in C initialiser style. The output
format of compface (and the input format for uncompface) is some number of lines made up
of a space followed by printable characters (in the range ``!'' to ``~'' inclusive). The
first line contains 72 characters and following lines contain 79 characters except that
the last line may be short.

This version of compface has been patched to also be able to handle normal XBM images.
uncompface will produce XBM output only if the -X switch is applied.

The amount of compression obtained varies between face image files but the output of
compface averages less than 200 characters. The average number of output lines is three.


Exit status is normally 0. Possible errors include IO errors when opening, reading or
writing files, format errors in compface input files and invalid arguments. Each results
in an explanatory message on standard error and an exit status of 1. A warning will be
produced if compface detects extra input data.

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