Author
Perera, A. G. Amitha
Other Contributors
Stewart, Charles V.; Freedman, Daniel; Kettnaker, Vera M.; Mundy, Joseph L.; Nagy, George;
Date Issued
2003-05
Subject
Computer Science
Degree
PhD;
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.;
Abstract
The data model and region parameter estimation is robust, and thus the DBMEstimator can cope with outliers and modeling errors. Theoretical analysis shows that the DBM-Estimator is relatively insensitive to the parameter settings, which allows the DBM-Estimator to be applied to a variety of data sets without handtuning. Experimental comparisons with mixture models and the mean shift on synthetic data shows that the DBM-Estimator is able to detect extremely subtle discontinuities that the other approaches cannot.; Our formulation combines M-estimation and region growing, and poses the region extraction problem as the joint minimization of two inter-dependent cost functions. Starting from a small initial region, the DBM-Estimator evolves the region to the final estimate, while simultaneously estimating the data model parameters during the region evolution. The distinguishing feature of the DBM-Estimator is that it only requires a data model for the region of interest, and is thus "noncompetitive". The DBM-Estimator is controlled primarily by only two parameters, which simplifies the application to various problems.; A fundamental component of many computer vision problems is extracting a region of interest from a data set and estimating the parameters of a model describing the data in the region. It occurs in diverse situations such as 3-D reconstruction from range data; computer-aided cartography; tracking; object recognition; and featurebased registration. In an important class of problems, there is some data model and region shape information available for the region of interest, but none is available for the rest of the data. We present an approach for solving this class of problems. Dubbed the DBM-Estimator, it is a framework that combines all available model and shape constraints to jointly estimate the parameters of a data model and region boundary that describes the region of interest.; We demonstrate the DBM-Estimator on three diverse problems: surface extraction from range data, forest boundary.;
Description
May 2003; School of Science
Department
Dept. of Computer Science;
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection;
Access
Restricted to current Rensselaer faculty, staff and students. Access inquiries may be directed to the Rensselaer Libraries.;