Method and apparatus for improving the speed of belief...

Image analysis – Image segmentation – Region labeling

Reexamination Certificate

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C382S155000, C703S002000

Reexamination Certificate

active

07606420

ABSTRACT:
One embodiment of the present invention provides a system that efficiently performs a belief-propagation (BP) operation. During this process, for each node i in a BP graph, the system iteratively performs the following operations. First, the system receives incoming messages mjiat node i for all adjacent nodes j. Next, the system calculates the full product Piof all incoming messages mji. The system then produces an outgoing message mijfrom node i to node j by, computing a partial product Pijof all incoming messages to node i except for the message from node j by dividing the Piby the incoming message from node j. The system then combines Pijwith a data function for node i and a smoothness function between node i and node j to produce outgoing message mij. Finally the system communicates outgoing message mijto node j. This system improves computational efficiency over existing BP techniques because computing the full product Pifirst and then dividing by individual incoming messages to produce each partial product is faster than computing each partial product separately.

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