Multi-variate optimal speckle reduction in SAR imagery
- 1 February 1997
- journal article
- research article
- Published by Taylor & Francis in International Journal of Remote Sensing
- Vol. 18 (3) , 603-627
- https://doi.org/10.1080/014311697218962
Abstract
This paper addresses a speckle reduction method of coregistered SAR images based on pixel-to-pixel summation. The sample intensity summation technique (incoherent summation) is well known and is successfully applied to obtain multi-look data. It is shown that the speckle reduction obtained by such a summation depends on the speckle correlation across all the channels. On the contrary, a coherent summation performed by the Whitening Filter leads to an optimal speckle reduction. A comprehensive review of multi-channel summations is presented, followed by practical results obtained from multi-temporal SAR ERS-1 images.Keywords
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