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Proceedings Paper

On the filtering of hyperspectral remote sensing image
Author(s): Peijun Du; Yunhao Chen; Yonggui Yang; Huapeng Zhang
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Paper Abstract

Noises are inevitable in Hyperspectral Remote Sensing (HRS) image, it is very important to design effective filter to reduce the impacts of noises and enhance image quality and information content. Based on the characteristics of HRS image, three filtering strategies, including image dimension filtering, spectral dimension filtering and three-dimensional filtering, are proposed in this paper. The principle of image dimension filtering is similar to traditional image filtering from spatial and frequency domain. The image of each band is viewed as an independent set and filtering operation is used to it. Some filters, including mean filter, medium filter and frequency filter, are used to reduce noises in every band. The key idea of spectral dimension filtering is to take every pixel as the processing target, and the gray value (or albedo) of the pixel on all bands will form a spectral vector. Filter is used to the spectral vector of every pixel, and mean filter with different scales is tested in this paper. Three-dimension filtering is different from the former two methods by its spatial and spectral dimension processing simultaneously. It views HRS image as a large data cube with row, column and layer (band), so filter is based on data cube. In this paper the 3×3×3 cube is used as filtering template, and that means those neighbors of adjacent bands of a pixel on a given band will be used to filter, so both spatial and spectral information is considered in this new method. Finally, some examples are experimented and quality assessment of sole band, similarity measure to some pixels and other statistical indexes are used to assess the performance, and then related conclusions and suggestions are given.

Paper Details

Date Published: 3 November 2005
PDF: 7 pages
Proc. SPIE 6044, MIPPR 2005: Image Analysis Techniques, 604418 (3 November 2005); doi: 10.1117/12.655105
Show Author Affiliations
Peijun Du, China Univ. of Mining and Technology (China)
Yunhao Chen, Beijing Normal Univ. (China)
Yonggui Yang, China Univ. of Mining and Technology (China)
Huapeng Zhang, China Univ. of Mining and Technology (China)

Published in SPIE Proceedings Vol. 6044:
MIPPR 2005: Image Analysis Techniques
Deren Li; Hongchao Ma, Editor(s)

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