Jidesh, P.Balaji, B.2020-03-312020-03-312018International Journal of Remote Sensing, 2018, Vol.39, 20, pp.6540-655610.1080/01431161.2018.1460510https://idr.nitk.ac.in/handle/123456789/9795In this article, we modify Mumford Shah level-set model to handle speckles and blur in synthetic aperture radar (SAR) imagery. The proposed model is formulated using a non-local regularization framework. Hence, the model duly cares about local gradient oscillations (corresponding to the fine details/textures) during the evolution process. It is assumed that the speckle intensity is gamma distributed, while designing a maximum a posteriori estimator of the functional. The parameters of the gamma distribution (i.e. scale and shape) are estimated using a maximum likelihood estimator. The regularization parameter of the model is evaluated adaptively using these (estimated) parameters at each iteration. The split-Bregman iterative scheme is employed to improve the convergence rate of the model. The proposed and the state-of-the-art despeckling models are experimentally verified and compared using a large number of speckled and blurred SAR images. Statistical quantifiers are used to numerically evaluate the performance of various models under consideration. 2018, 2018 Informa UK Limited, trading as Taylor & Francis Group.Article