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Proceedings Paper

Background suppression issues in anomaly detection for hyperspectral imagery
Author(s): Yulei Wang; Shih-Yu Chen; Chunhong Liu; Chein-I Chang
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Paper Abstract

Anomaly detection becomes increasingly important in hyperspectral data exploitation due to the use of high spectral resolution which can uncover many unknown substances that cannot be visualized or known a priori. Unfortunately, in real world applications with no availability of ground truth its effectiveness is generally performed by visual inspection which is the only means of evaluating its performance qualitatively in which case background information provides an important piece of information to help image analysts to interpret results of anomaly detection. Interestingly, this issue has never been explored in anomaly detection. This paper investigates the effect of background on anomaly detection via various degrees of background suppression. It decomposes anomaly detection into a two-stage process where the first stage is background suppression so as to enhance anomaly contrast against background and is then followed by a matched filter to increase anomaly detectability by intensity. In order to see background suppression progressively changing with data samples causal anomaly detection is further developed to see how an anomaly detector performs background suppression sample by sample with sample varying spectral correlation. Finally, a 3D ROC analysis used to evaluate effect of background suppression on anomaly detection.

Paper Details

Date Published: 22 May 2014
PDF: 10 pages
Proc. SPIE 9124, Satellite Data Compression, Communications, and Processing X, 912413 (22 May 2014); doi: 10.1117/12.2049031
Show Author Affiliations
Yulei Wang, Univ. of Maryland, Baltimore County (United States)
Harbin Engineering Univ. (China)
Shih-Yu Chen, Harbin Engineering Univ. (China)
Chunhong Liu, China Agricultural Univ. (China)
Chein-I Chang, Univ. of Maryland, Baltimore County (China)

Published in SPIE Proceedings Vol. 9124:
Satellite Data Compression, Communications, and Processing X
Bormin Huang; Chein-I Chang; José Fco. López, Editor(s)

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