PQS

from The Free On-line Dictionary of Computing (8 July 2008)

Picture Quality Scale
PQS

   <graphics> (PQS) A system for rating image quality based upon
   features of images that affect their perception by the human
   eye, rather than the traditional {signal-to-noise ratio} which
   examines differences for every single {pixel}.

   [Details?]

   (1995-01-12)