Lossless PNG image reductions

[This announcement is for the developers of libpng-based PNG encoders.]

The lossless PNG image reduction code (opngreduc) is now available as a top-level module. Making your PNG encoder more efficient is as easy as an #include "opngreduc.h" and a call to opng_reduce_image().

The principle behind image reductions is explained in detailed in the PNG optimization guide, section 2.1 "The PNG image type".
http://optipng.sourceforge.net/pngtech/png_optimization.html

Posted by Cosmin Truta 2012-08-25