Document (#18875)

Author

Ma, W.-Y.
Manjunath, B.S.

Title

¬A texture thesaurus for browsing large aerial photographs

Source

Journal of the American Society for Information Science. 49(1998) no.7, S.633-648

Year

1998

Abstract

A texture-based image retrieval system for browsing large-scale aerial photographs is presented. The salient components of this system include texture feature extraction, image segmentation and grouping, learning similarity measure, and a texture thesaurus model for fast search and indexing. The texture features are computed by filtering the image with a bank of Gabor filters. This is followed by a texture gradient computation to segment each large airphoto into homogeneous regions. A hybrid neural network algorithm is used to learn the visual similarity by clustering patterns in the feature space. With learning similarity, the retrieval performance improves significantly. Finally, a texture image thesaurus is created by combining the learning similarity algorithm with a hierarchical vector quantization scheme. This thesaurus facilitates the indexing process while maintaining a good retrieval performance. Experimental results demonstrate the robustness of the overall system in searching over a large collection of airphotos and in selecting a diverse collection of geographic features such as housing developments, parking lots, highways, and airports

Form

Bilder

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