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Graph Cuts

  • Marco Alexander Treiber
Chapter
Part of the Advances in Computer Vision and Pattern Recognition book series (ACVPR)

Abstract

Energy functions consisting of a pixel-wise sum of data-driven energies as well as a sum of terms affected by two adjacent pixels (aiming at ensuring consistency for neighboring pixels) are quite common in computer vision. This kind of energy can be represented well by Markov Random Fields (MRFs). If we have to take a binary decision, e.g., in binary segmentation, where each pixel has to be labeled as “object” or “background,” the MRF can be supplemented by two additional nodes, each representing one of the two labels. The globally optimal solution of the resulting graph can be found by finding its minimum cut (where the sum of the weights of all severed edges is minimized) in polynomial time by maximum flow algorithms. Graph cuts can be extended to the multi-label case, where it is either possible to find the exact solution when the labels are linearly ordered or the solution is approximated by iteratively solving binary decisions. An instance of the max-flow algorithm, binary segmentation, as well as stereo matching and optical flow calculation, which can both be interpreted as multi-labeling tasks, is presented in this chapter. Normalized cuts seeking a spectral, i.e., eigenvalue solution, complete the chapter.

Keywords

Markov Random Field Adjacent Pixel Stereo Match Spare Capacity Binary Segmentation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag London 2013

Authors and Affiliations

  • Marco Alexander Treiber
    • 1
  1. 1.ASM Assembly Systems GmbH & Co. KGMunichGermany

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