Estimation of Blur and Depth_Map of a De-focused Image by Sparsity using Gauss Markov Random Field Convex-Prior
Journal: International Journal of Science and Research (IJSR) (Vol.8, No. 11)Publication Date: 2019-11-05
Authors : Latha H N; H N Poornima;
Page : 728-733
Keywords : Space-variant Blur-map; Just Noticeable Blur; Gradient Descent; GMRF; Convexity;
Abstract
In this work, we propose a new method for blur-map and depth estimation from de-focused observations using just noticeable blur (JNB) [1] method. Using JNB, we find the blur-map and then estimate the depth of the image in the depth from de-focus setting. We use a novel regularization based optimization framework, wherein we assume the blur-map as Gauss Markov random field. We initially obtain robust estimates of the blur-map then depth of the scene using a convex prior [2]. We show that JNB and clear dictionaries are not replaceable when conducting sparse patch reconstruction. We also show that the estimated blur-map which is utilized for efficient restoration of latent image by de-blurring.
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