A NEW APPROACH TO EDGE DETECTION OF SAR IMAGES

Zhao Zhiqin; Han Chunlin; Wang Jianguo; Huang Shunji

Volume 23 Issue 7

Jul. 2001

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Zhao Zhiqin, Han Chunlin, Wang Jianguo, Huang Shunji . A NEW APPROACH TO EDGE DETECTION OF SAR IMAGES[J]. Journal of Electronics & Information Technology, 2001, 23(7): 625-630.

Citation:

Zhao Zhiqin, Han Chunlin, Wang Jianguo, Huang Shunji . A NEW APPROACH TO EDGE DETECTION OF SAR IMAGES[J]. Journal of Electronics & Information Technology, 2001, 23(7): 625-630.

Zhao Zhiqin, Han Chunlin, Wang Jianguo, Huang Shunji . A NEW APPROACH TO EDGE DETECTION OF SAR IMAGES[J]. Journal of Electronics & Information Technology, 2001, 23(7): 625-630.

Citation:

Zhao Zhiqin, Han Chunlin, Wang Jianguo, Huang Shunji . A NEW APPROACH TO EDGE DETECTION OF SAR IMAGES[J]. Journal of Electronics & Information Technology, 2001, 23(7): 625-630.

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A NEW APPROACH TO EDGE DETECTION OF SAR IMAGES

Received Date: 1999-10-15
Rev Recd Date: 2000-03-06
Publish Date: 2001-07-19

Abstract

Abstract

The high frequency part of wavelet transform reflects the detail of edges. And median filter is a kind of nonlinear stack filter, it has good abilities in keeping edge and filtering clutter. Based on the analysis of the characteristics of the images of Synthetic Aperture Radar (SAR), this paper puts forward a combined method for edge s detection of SAR images. This method is composed of wavelet transform, fuzzy median filter, adaptive thresholding and differential gradient operator. In using fuzzy median filter, this paper gives out a new method for adaptive selecting the factors of fuzzy median filter. The experimental results show the effectiveness and stability of this method.

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References(1)

References

V.V. Zaitsev, Analysis of the speckle suppression algorithms based on the MAP approach. EUSAR(Conference of European Synthetic Aperture Radar), Berlin, Germany, 1996, 159-162.Yang Jinhao, et al., Speckle filtering for SAR images based on orthonormal wavelet transform. EUSAR(Conference of European Synthetic Aperture Radar), Berlin, Germany, 1996, 151-154.F. Samuel, et al., Unsupervised multiscale speckle filtering. IEEE Int. Conference on Image Processing, Seattle, U. S. A., 1996, 391-394.[2]李建平,小波分析与信号处理,重庆,重庆出版社,1997,第9章.[3]秦前清,杨宗凯,实用小波分析,西安,西安电子科技大学出版社,1994,第2章.[4]T. Akira, A design method of fuzzy weighted median filter, IEEE Int. Conference on Image Processing, Seattle, U. S. A., 1996, 423-426.

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