Provided by: perceptualdiff_1.2-2build1_amd64 bug


       perceptualdiff - compare images using a perceptually based image metric


       perceptualdiff  <image1> <image2> [options]


       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


       A summary of options is included below.

              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


       perceptualdiff was written by Yangli Hector Yee <>

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

                                        September 28, 2007                      PERCEPTUALDIFF(1)