An improved speckle reduction method of SAR image

作者：Zhang Jianguo; Wang Wenbo^*

来源：International Journal of Advancements in Computing Technology, 2012, 4(19): 579-585.

DOI：10.4156/ijact.vol4.issue 19.69

• Composition analysis
• De-Noise
• Different scale
• Empirical Mode Decomposition
• Intrinsic Mode functions
• SAR Images
• Source signals
• Speckle noise
• Speckle reduction
• Structure character

The speckle noise blurs the structure character of SAR image. It is difficult that to enhance structure character of SAR images. In this paper, a new approach is proposed to separate noise and source signals from SAR images. Firstly, the empirical mode EMD) is used to decompose the SAR image and a series basis components intrinsic mode IMF) are obtained. At the second stage, ICA is applied to denoise of IMFs and dominant basis components. In this method, the speckle noise of SAR image in different scale is filtered. The proposed method can effectively filter the speckle noise and enhance the structure character which finally can be seen by people's eyes. The experiment result indicates that speckle noise of our result is substantially decreased and the structure character and texture of the result is clearer.

• 出版日期2012
• 单位武汉科技大学