https://github.com/majioa/libqpbo

QPBO implementation by Vladimir Kolmogorov as a system library
https://github.com/majioa/libqpbo

Last synced: 1 day ago
JSON representation

QPBO implementation by Vladimir Kolmogorov as a system library

• Host: GitHub
• URL: https://github.com/majioa/libqpbo
• Owner: majioa
• License: gpl-3.0
• Created: 2024-02-11T19:30:42.000Z (12 months ago)
• Default Branch: master
• Last Pushed: 2024-02-18T17:05:49.000Z (11 months ago)
• Last Synced: 2024-11-23T00:19:19.159Z (2 months ago)
• Language: C++
• Size: 62.5 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGES.TXT
  • License: LICENSE

Awesome Lists containing this project

README

        
QPBO

====

# QPBO with large graph support

This is a ready-to-use QPBO adaptation for OpenGM (original code courtesy of V. Kolmogorov) for very large graphs. Original source code availbable at http://pub.ist.ac.at/~vnk/software.html.

## Original description

Implements algorithms for minimizing functions of binary variables with unary and pairwise terms based on roof duality described in the following papers:



Roof duality, complementation and persistency in quadratic 0-1 optimization. 


P. L. Hammer, P. Hansen, and B. Simeone.


Mathematical Programming, 28:121-155, 1984.





Network flows and minimization of quadratic pseudo-Boolean functions. 


E. Boros, P. L. Hammer, and X. Sun.


Technical Report RRR 17-1991, RUTCOR Research Report, May 1991.





Preprocessing of Unconstrained Quadratic Binary Optimization. 


E. Boros, P. L. Hammer, and G. Tavares.


Technical Report RRR 10-2006, RUTCOR Research Report, April 2006.





Optimizing binary MRFs via extended roof duality. 


C. Rother, V. Kolmogorov, V. Lempitsky, and M. Szummer.


CVPR 2007.



Original implementation by Vladimir Kolmogorov.

The source is originated from several ones: [1](https://github.com/fgrsnau/libqpbo.git), [2](https://github.com/Skielex/QPBO.git), [3](https://github.com/NSchertler/QPBO-opengm.git), and [4](https://github.com/micmacIGN/micmac/tree/master/src/uti_phgrm/GraphCut/QPBO-v1.4).

## Modifications

Changed to allow for very large graphs with up to 2.1 billion nodes and "any number" of edges/terms.

Main changes include:

- Changed edge variables to `long long`.

- Changed a few other variables to `long long`.

- Reduced `sizeof(Node)` by changing some variable types in the `struct`.