


JUDGE(1)                                                 JUDGE(1)


NAME
       judge - guess jpeg picture quality

SYNOPSIS
       judge [ -v ]

       judge [ -b ] file ...

DESCRIPTION
       Judge  reads each argument and attempts to guess the qual-
       ity with which it was saved. Currently, only a rough indi-
       cator  is  calculcated, ranging from 0 (lowest quality) to
       1000 (highest quality),  an  extension  to  other  formats
       would be straightforward, but isn't planned.

       It  can  read  all pictures the IJG jpeg library can read,
       i.e. normal and progressive jpeg's.

   OPTIONS
       -v     Display version number and exit.

       -b     Display  only  quality  indicator,  suppress  other
              information (filenames).

BUGS
       It  should  be  possible  to judge pictures stored in non-
       lossy formats, too, since conversion to jpeg may influence
       the measurement.

       The  quality  indicator  is  non-linear, and could be much
       better.

       The algorithm to calculate the quality was made up  in  10
       minutes, after staring at various histograms.

ACKNOWLEDGEMENTS
       This program contains code from the IJG jpeg software.




















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