NAME

       pngcomp - PNG (Portable Network Graphics) comparison tool

SYNOPSIS

       pngcomp [-vVh] image1.png image2.png

DESCRIPTION

       pngcomp  gives  some  basic  statistics  about  the  difference between two images. It was
       created as a measure of various color quantization methods.

OPTIONS

       -v     Verbose, does nothing as yet.

       -V     Version, prints version information.

       -h     Help, prints this message.

NOTES

       The stats created by this program are purely based on the Euclidean distance in RGBA space
       between  the  pixels of the images. Later versions will include different measures such as
       CIE color space measurements and filters for perception models.

       The error calculation used reflects the perceived quality of images only roughly.

       To determine what image is better nothing can surpass having a look for yourself!

AUTHOR

       pngcomp was written by Stuart Coyle <stuart@cybertherial.com>.

       This manual page was written by Nelson A. de Oliveira <naoliv@gmail.com>, for  the  Debian
       project (but may be used by others).

                                 Sat, 08 Jul 2006 00:54:16 -0300                       PNGCOMP(1)