


JUDGE(1)                                                 JUDGE(1)


NNAAMMEE
       _j_u_d_g_e - guess jpeg picture quality

SSYYNNOOPPSSIISS
       jjuuddggee [ --vv ]

       jjuuddggee [ --bb ] file ...

DDEESSCCRRIIPPTTIIOONN
       _J_u_d_g_e  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 IIJJGG jjppeegg lliibbrraarryy can read,
       i.e. normal and progressive jpeg's.

   OOPPTTIIOONNSS
       --vv     Display version number and exit.

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

BBUUGGSS
       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.

AACCKKNNOOWWLLEEDDGGEEMMEENNTTSS
       This program contains code from the IIJJGG jjppeegg ssooffttwwaarree..




















                  Judge - guess picture quality                 1


