A new approach to noise reduction in a hyperspectral image

Li Yu Chang, Chi Farn Chen

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

Hyperspectral images are able to provide the detailed spectral information necessary for the discrimination of different land targets in various kinds of remotely sensed images. The linear spectral mixing model is a widely used discrimination method for modeling the variety of multiple land targets in hyperspectral images. Basically, the linear spectral mixing model is solved by least squares adjustment to acquire the minimal-error solutions. It is believed that the reduction of the noise that inherently exists in each spectral band of the hyperspectral image can increase the discrimination accuracy. In general, this noise is usually a consequence of noise recorded by the hyperspectral sensor, which is caused by the absorption or emission of the radiance of atmospheric particles during the energy transportation process. A noise filtering preprocessing process based on empirical mode decomposition (EMD) is proposed. The purpose is to reduce the inherent noise and further minimize the residuals of least squares solutions for hyperspectral images. Given EMD's fully data driven characteristics, the original data can be adaptively decomposed into several components. These components are then filtered by dropping those with noise. The simulation test results indicate that the EMD noise filtering process can effectively decrease the residuals of least square adjustment and mean abundance errors. Moreover, the improved accuracy of the classification demonstrates that the EMD process should be a valuable for noise reduction in hyperspectral image.

原文???core.languages.en_GB???
主出版物標題29th Asian Conference on Remote Sensing 2008, ACRS 2008
頁面376-383
頁數8
出版狀態已出版 - 2008
事件29th Asian Conference on Remote Sensing 2008, ACRS 2008 - Colombo, Sri Lanka
持續時間: 10 11月 200814 11月 2008

出版系列

名字29th Asian Conference on Remote Sensing 2008, ACRS 2008
1

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???event.eventtypes.event.conference???29th Asian Conference on Remote Sensing 2008, ACRS 2008
國家/地區Sri Lanka
城市Colombo
期間10/11/0814/11/08

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