Samiksha Jaiswal (Editor)

OpenCog

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Original author(s)
  
OpenCog Developers

Development status
  
Active

Platform
  
Linux

Developer(s)
  
OpenCog Foundation

Written in
  
C++, Python, Scheme

Initial release
  
21 January 2008; 9 years ago (2008-01-21)

OpenCog is a project that aims to build an open source artificial intelligence framework. OpenCog Prime is an architecture for robot and virtual embodied cognition that defines a set of interacting components designed to give rise to human-equivalent artificial general intelligence (AGI) as an emergent phenomenon of the whole system. OpenCog Prime's design is primarily the work of Ben Goertzel while the OpenCog framework is intended as a generic framework for broad-based AGI research. Research utilizing OpenCog has been published in journals and presented at conferences and workshops including the annual Conference on Artificial General Intelligence. OpenCog is released under the terms of the GNU Affero General Public License.

Contents

Origin

OpenCog was originally based on the release in 2008 of the source code of the proprietary "Novamente Cognition Engine" (NCE) of Novamente LLC. The original NCE code is discussed in the PLN book (ref below). Ongoing development of OpenCog is supported by Artificial General Intelligence Research Institute (AGIRI), the Google Summer of Code project, and others.

Components

OpenCog consists of:

  • A graph database that holds terms, atomic formulas, sentences and relationships as hypergraphs; giving them a probabilistic truth-value interpretation, dubbed the AtomSpace.
  • A satisfiability modulo theories solver, built in as a part of a generic graph query engine, for performing graph and hypergraph pattern matching (isomorphic subgraph discovery).
  • An implementation of a probabilistic reasoning engine based on probabilistic logic networks (PLN).
  • A probabilistic genetic program evolver called Meta-Optimizing Semantic Evolutionary Search, or MOSES, originally developed by Moshe Looks who is now employed at Google.
  • An attention allocation system based on economic theory, ECAN.
  • An embodiment system for interaction and learning within virtual worlds based in part on OpenPsi and Unity.
  • A natural language input system consisting of Link Grammar and RelEx, both of which employ AtomSpace-like representations for semantic and syntactic relations.
  • A natural language generation system called SegSim, with implementations NLGen and NLGen2.
  • An implementation of Psi-Theory for handling emotional states, drives and urges, dubbed OpenPsi.
  • Interfaces to Hanson Robotics robots, including emotion modelling via OpenPsi.

    • Relation to Singularity Institute

    In 2008, the Machine Intelligence Research Institute (MIRI), formerly called Singularity Institute for Artificial Intelligence (SIAI), which was sponsored OpenCog, resulting in a part-time post-doc Joel Pitt and a full-time system engineer. Many contributions from the open source community have been made since OpenCog's involvement in the Google Summer of Code in 2008 and 2009. Currently the SIAI no longer supports OpenCog. Today, OpenCog receives funding and support from several sources including the Hong Kong government, Hong Kong Polytechnic University and the Jeffrey Epstein VI Foundation.

    References

    OpenCog Wikipedia
    (Text) CC BY-SA