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The Chain Pyramid: Hierarchical Contour Processing
April 1990 (vol. 12 no. 4)
pp. 363-376

A novel hierarchical approach toward fast parallel processing of chain-codable contours is presented. The environment, called the chain pyramid, is similar to a regular nonoverlapping image pyramid structure. The artifacts of contour processing on pyramids are eliminated by a probabilistic allocation algorithm. Building of the chain pyramid is modular, and for different applications new algorithms can be incorporated. Two applications are described: smoothing of multiscale curves and gap bridging in fragmented data. The latter is also employed for the treatment of branch points in the input contours. A preprocessing module allowing the application of the chain pyramid to raw edge data is also described. The chain pyramid makes possible fast, O(log(image/sub -/size)), computation of contour representation in discrete scale-space.

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Index Terms:
picture processing; interobject distance measure; medial axes; discrete distance maps; minimal point-to-point distances; distance measurement; picture processing
Citation:
P. Meer, C.A. Sher, A. Rosenfeld, "The Chain Pyramid: Hierarchical Contour Processing," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 12, no. 4, pp. 363-376, April 1990, doi:10.1109/34.50622
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