Complete source codes of predefined classes (including the Vision package) of the Actor Prolog concurrent object-oriented logic programming system are published on GitHub: https://github.com/Morozov2012/actor-prolog-java-library
Download and install the academic version of Actor Prolog: Download
New! The new release of the Actor Prolog system is published: Min.2019.11.23[Beta]
Please read the installation manual of Actor Prolog.
Russian installation manual of Actor Prolog is also available.