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| A Multi-channel Extension of Polarimetric Whitening Filter |
| Wu Yong-hui; Ji Ke-feng; Yu Wen-xian |
| School of Electronics Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract In order to reduce the effect of speckle on classification and detection, the polarimetric synthetic aperture radar imagery should be preprocessed to suppress speckle. The Polarimetric Whitening Filter (PWF) is efficient in speckle suppression by using complex data of three polarimetric channels. Nevertheless, it only outputs one channel of data. In this paper, a method called Multi-Channel Polarimetric Whitening Filter (MCPWF) is presented. It maintains the optimal speckle reduction performance of the PWF, and three polarimetric channels of output are obtained as well, so that fully polarimetric data can also be used in advanced processing. The effectiveness of the MCPWF is verified through experimental results of Pi-SAR data.
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Received: 27 December 2004
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2006, Vol. 28 
