Special Section on Satellite Data Compression

Compression of hyperspectral images with discriminant features enhanced

[+] Author Affiliations
Chulhee Lee, Euisun Choi, Taeuk Jeong, Sangwook Lee, Jonghwa Lee

Yonsei University, Department of Electrical and Electronic Engineering, 134 Shinchon-Dong, Seodaemoon-Gu, Seoul 120-749 Republic of Korea

J. Appl. Remote Sens. 4(1), 041764 (October 28, 2010). doi:10.1117/1.3517719
History: Received December 4, 2009; Revised October 5, 2010; Accepted October 15, 2010; October 28, 2010; Online October 28, 2010
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Abstract

In this paper, we propose two compression methods for hyperspectral images with discriminant features enhanced. Generally, when hyperspectral images are compressed with conventional image compression algorithms, which mainly minimize mean squared errors, discriminant features of the original data may not be well preserved since they may not be necessarily large in energy. In this paper, we propose two compression methods that do preserve the discriminant information. In the first method, we enhanced the discriminant features and then compressed the enhanced data using conventional image compression algorithms such as 3D JPEG 2000. In the second method, we applied a feature extraction method and extracted the discriminantly dominant feature vectors. By examining the dominant feature vectors, we determined the discriminant usefulness of each spectral band. Based on these findings, we determined the bit allocation of each spectral band assuming 2D compression methods are used. Experiments show that the proposed methods effectively preserved the discriminant information and yielded improved classification accuracies compared to existing compression algorithms.

© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Chulhee Lee ; Euisun Choi ; Taeuk Jeong ; Sangwook Lee and Jonghwa Lee
"Compression of hyperspectral images with discriminant features enhanced", J. Appl. Remote Sens. 4(1), 041764 (October 28, 2010). ; http://dx.doi.org/10.1117/1.3517719


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