A new blind image deconvolution technique is developed for atmosphericturbulence deblurring to overcome limitations of 'generic' blinddeconvolutionalgorithms that do not take into account the complicated ph...
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A new blind image deconvolution technique is developed for atmosphericturbulence deblurring to overcome limitations of 'generic' blinddeconvolutionalgorithms that do not take into account the complicated physics of the turbulence. The originality of the proposed approach relies on an actual physical model, known as the Fried kernel, that quantifies the impact of the atmosphericturbulence on the optical resolution of images. While the original expression of the Fried kernel can seem cumbersome at first sight, the authors show that it can be reparameterised in a much simpler form. This simple expression allows to efficiently embed this kernel in the proposed blindatmosphericturbulencedeconvolution (BATUD) algorithm. BATUD is an iterative algorithm that alternately performs deconvolution and estimates the Fried kernel by jointly relying on a Gaussian mixture model prior to natural image patches and controlling for the square Euclidean norm of the Fried kernel. Numerical experiments show that the proposed blinddeconvolutionalgorithm behaves well in different simulated turbulence scenarios, as well as on real images. Not only BATUD outperforms state-of-the-art approaches used in atmosphericturbulencedeconvolution in terms of image quality metrics but is also faster.
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