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Optical Engineering

Expectation-maximization algorithms for image processing using multiscale models and mean-field theory, with applications to laser radar range profiling and segmentation
Author(s): Andy Tsai; Jun Zhang; Alan S. Willsky
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Paper Abstract

We describe a new class of computationally efficient algorithms designed to solve incomplete-data problems frequently encountered in image processing and computer vision. The basis of this framework is the marriage of the expectation-maximization (EM) procedure with two powerful methodologies. In particular, we have incorporated optimal multiscale estimators into the EM procedure to compute estimates and error statistics efficiently. In addition, mean-field theory (MFT) from statistical mechanics is incorporated into the EM procedure to help solve the computational problems that arise from our use of Markov random-field (MRF) modeling of the hidden data in the EM formulation. We have applied this algorithmic framework and shown that it is effective in solving a wide variety of image-processing and computer-vision problems. We demonstrate the application of our algorithmic framework to solve the problem of simultaneous anomaly detection, segmentation, and object profile estimation for noisy and speckled laser radar range images.

Paper Details

Date Published: 1 July 2001
PDF: 15 pages
Opt. Eng. 40(7) doi: 10.1117/1.1385168
Published in: Optical Engineering Volume 40, Issue 7
Show Author Affiliations
Andy Tsai, Massachusetts Institute of Technology (United States)
Jun Zhang, Univ. of Wisconsin/Milwaukee (United States)
Alan S. Willsky, Massachusetts Institute of Technology (United States)

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