Speckle denoising through local rényi entropy smoothing

Authors:
Salvador Gabarda;Gabriel Cristóbal
Affiliations:
Instituto de Optica (CSIC), Serrano, Madrid, Spain;Instituto de Optica (CSIC), Serrano, Madrid, Spain
Venue:
CAIP'11 Proceedings of the 14th international conference on Computer analysis of images and patterns - Volume Part II
Year:
2011

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Abstract

Quality enhancement of radar images is highly related to speckle noise reduction. There are plenty of such techniques that have been developed by different authors. However, a definitive method has not been already attained. Filtering methods are popular to reduce speckle noise. This paper introduces a new method based on filtering a smoothed local pseudo-Wigner distribution using a local Rényi entropy measure. Results are compared to other well-known noise reduction filtering methods for artificially degraded speckle images and real world image examples. Experimental results confirm that this method outperforms other classical speckle denoising methods.