Segmented PCA-based compression for hyperspectral image analysis

Qian Du; Chein-I Chang

doi:10.1117/12.518835

27 February 2004 Segmented PCA-based compression for hyperspectral image analysis

Qian Du, Chein-I Chang

Proceedings Volume 5268, Chemical and Biological Standoff Detection; (2004) https://doi.org/10.1117/12.518835
Event: Optical Technologies for Industrial, Environmental, and Biological Sensing, 2003, Providence, RI, United States

Abstract

Hyperspectral images have high spectral resolution that helps to improve object classification. But its vast data volume also causes problems in data transmission and data storage. Since there is high correlation among spectral bands in a hyperspectral image, how to reduce the data redundancy while keeping the important information for the following data analysis is a challenging task. In this paper, we investigate a compression technique based on segmented Principal Components Analysis (PCA). A hyperspectral image cube is divided into several non-overlapping blocks in accordance with band-to-band cross-correlations, followed by the PCA performed in each block. A major advantage resulting from this approach is computational efficiency. The utility of the proposed segmented PCA-based compression in target dtection and classification will be investigated. The experiments demonstrate that the segmented PCA-based compression generally outperforms PCA-based compression in terms of high detection and classification accuracy on decompressed hyperspectral image data.

Citation Download Citation

Qian Du and Chein-I Chang "Segmented PCA-based compression for hyperspectral image analysis", Proc. SPIE 5268, Chemical and Biological Standoff Detection, (27 February 2004); https://doi.org/10.1117/12.518835

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