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Intelligent shape feature extraction and indexing for efficient content-based medical image retrieval

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2 Author(s)
Mlsna, P.A. ; Dept. of Electr. Eng., Northern Arizona Univ., Flagstaff, AZ, USA ; Sirakov, N.M.

We describe the development of novel and efficient approaches and algorithms for a medical image content-based retrieval system capable of extracting and indexing key information about region shape. First, the general structure and the main components of the system are discussed. For grayscale segmentation to locate regions, we have explored a fast active contour approach based on the geometric heat differential equation. Region representation involves a set of extracted shape-based features. A technique for feature organization using N-dimensional feature vectors is employed. The image retrieval process compares similarity of query vectors to the indexed feature vectors. A convex hull model using the heat differential equation is used to organize the index of features to reduce the search space. Some experiments have been performed to test and validate certain portions of our approach. Finally; advantages and disadvantages together with the computational complexity of this system are discussed.

Published in:

Image Analysis and Interpretation, 2004. 6th IEEE Southwest Symposium on

Date of Conference:

28-30 March 2004

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