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2014 | OriginalPaper | Buchkapitel

Semi-Global Matching: A Principled Derivation in Terms of Message Passing

verfasst von : Amnon Drory, Carsten Haubold, Shai Avidan, Fred A. Hamprecht

Erschienen in: Pattern Recognition

Verlag: Springer International Publishing

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Abstract

Semi-global matching, originally introduced in the context of dense stereo, is a very successful heuristic to minimize the energy of a pairwise multi-label Markov Random Field defined on a grid. We offer the first principled explanation of this empirically successful algorithm, and clarify its exact relation to belief propagation and tree-reweighted message passing. One outcome of this new connection is an uncertainty measure for the MAP label of a variable in a Markov Random Field.

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Fußnoten
1
In the sense that nodes can take one of two possible labels.
 
2
We will drop the indices in \(\varphi (d_{\mathbf {p}})\) and \(\varphi (d_{\mathbf {p}},d_{\mathbf {q}})\) as they are clear from the function inputs.
 
3
In the presentation of the algorithm in [17] spanning trees are used, but as mentioned in [9], this is not necessary.
 
4
In terms of message passing on a factor graph, one variant represents factor-to-node messages, while the other gives node-to-factor messages.
 
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Metadaten
Titel
Semi-Global Matching: A Principled Derivation in Terms of Message Passing
verfasst von
Amnon Drory
Carsten Haubold
Shai Avidan
Fred A. Hamprecht
Copyright-Jahr
2014
DOI
https://doi.org/10.1007/978-3-319-11752-2_4