Articles | Volume XLII-3/W12-2020
https://doi.org/10.5194/isprs-archives-XLII-3-W12-2020-141-2020
© Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
05 Nov 2020
| 05 Nov 2020
SPECKLE NOISE REDUCTION IN SAR IMAGES USING INFORMATION THEORY
Keywords: speckle filter, h-ϕ Entropies, asymptotic variance
Abstract. In this work, a new nonlocal means filter for single-look speckled data using the Shannon and Rényi entropies is proposed. The measure of similarity between a central window and patches of the image is based on a statistical test for comparing if two samples have the same entropy and hence have the same distribution.
The results are encouraging, as the filtered image has better signal-to-noise ratio, it preserves the mean, and the edges are not severely blurred.