Contents

• Introduction
• OpenGM Python Tutorial
• Examples
• OpenGM Python Reference Documentation
• Contact
• Authors
  • OpenGM Authors
  • OpenGM Python Author(s)

Introduction

OpenGM is a C++ template library for discrete factor graph models and distributive operations on these models. OpenGM Python exports the functionality of the C++ library OpenGM to Python. It includes state-of-the-art optimization and inference algorithms beyond message passing. OpenGM handles large models efficiently, since functions that occur repeatedly need to be stored only once . No restrictions are imposed on the factor graph or the operations of the model. The graphical model data structure, inference algorithms and different encodings of functions interoperate through well-defined interfaces. The binary OpenGM file format is based on the HDF5 standard and incorporates user extensions automatically.

The mathematical foundation can be found in the OpenGM Manual .

OpenGM Python Tutorial

• Import Opengm
• Construct a Graphical Model
  • Add Factors and Functions to a Graphical Model
  • Add Functions to a Graphical Model
  • Add Multiple Factors and Functions to a Graphical Model at once
• Save and Load a Graphical Model
• Infer/Optimize a Graphical Model
  • Belief propagation (Bp)
  • ICM
  • GraphCut

Examples

• Markov Chain
  • Code
  • Extended Factor Graph
• Potts Model
  • Code
  • Extended Factor Graph
• Interpixel-Boundary Segmentation’-Model
  • Code
  • Extended Factor Graph
• Pure Python ICM Solver
  • Code
• Iterate over a factors value table with a ‘shapeWalker’
• Pure Python Visitors
  • Code
  • Inference Animation
• MRF - Benchmark
  • Stereo matching problems:
  • Photomontage problems:
  • Binary image segmentation problems:
  • Denoising and Inpainting problems:
    • Code:
    • Result:

OpenGM Python Reference Documentation

• Important functions and classes
• opengm Package
• opengm.inference Package
• opengm.adder Package
• opengm.multiplier Package

Contact

opengm (AT) hci.iwr.uni-heidelberg (DOT) de

Authors

OpenGM Authors

• Bjoern Andres

  • bjoern (AT) andres (DOT) sc
  • www.andres.sc
  • Bjoern Andres,SEAS, Harvard University

• Thorsten Beier

  • thorsten.beier (AT) iwr (DOT) uni-heidelberg (DOT) de
  • Thorsten Beier, Multidimensional Image Processing Group Heidelberg Collaboratory for Image Processing (HCI), University of Heidelberg

• Joerg H. Kappes

  • kappes (AT) math (DOT) uni-heidelberg (DOT) de
  • ipa.iwr.uni-heidelberg.de/jkappes
  • Joerg Hendrik Kappes, Image & Pattern Analysis Group Heidelberg Collaboratory for Image Processing (HCI), University of Heidelberg

OpenGM Python Author(s)

• Thorsten Beier

  • thorsten.beier (AT) iwr (DOT) uni-heidelberg (DOT) de
  • Thorsten Beier, Multidimensional Image Processing Group Heidelberg Collaboratory for Image Processing (HCI), University of Heidelberg