NAME

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

SYNOPSIS

       compface [ infile [ outfile ] ] ...

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

DESCRIPTION

       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.

DIAGNOSTICS

       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.

BUGS

       Nominating standard input as input more than once does not work.

SEE ALSO

       Compface(3)

                                                 25 January 1990                                     COMPFACE(1)