NAME

       perceptualdiff - compare images using a perceptually based image metric

SYNOPSIS

       perceptualdiff  <image1> <image2> [options]

DESCRIPTION

       This manual page documents briefly the perceptualdiff command.

       perceptualdiff  is  a program that compares image1.tif and image2.tif using a perceptually
       based image metric. Note: Input files can also be in the PNG format

OPTIONS

       A summary of options is included below.

       -verbose
              Turns on verbose mode

       -fov <deg>
              Field of view in degrees (0.1 to 89.9)

       -threshold <p>
              #pixels p below which differences are ignored

       -gamma <g>
              Value to convert rgb into linear space (default 2.2)

       -luminance <l>
               White luminance (default 100.0 cdm^-2)

       -output <o.ppm>
               Write difference to the file o.ppm

AUTHOR

       perceptualdiff was written by Yangli Hector Yee <yeehector@users.sourceforge.net>

       This manual page was written by Jeff Breidenbach <jab@debian.org>, for the Debian  project
       (but may be used by others).

                                        September 28, 2007                      PERCEPTUALDIFF(1)