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Structural Similarity based Nonlocal Variational Models for Image Restoration
时间:2021年05月20日 09:09 点击数:

报告人:王伟

报告地点:腾讯会议ID:712 490 391

报告时间:2021年05月20日星期四09:00-10:00

邀请人:刘俊

报告摘要:

In this talk, I will introduce a novel nonlocal variational technique based on structural similarity (SS) information for image restoration problems. In the literature, patches extracted from images are compared according to their pixel values, and then nonlocal filtering can be employed for image restoration. The disadvantage of this approach is that intensity based patch distance may not be effective in image restoration, especially for images containing texture or structural information. We propose to use SS between image patches to develop nonlocal regularization models. In particular, two types of nonlocal regularizing functions are studied: a SS based nonlocal quadratic function (SS-NLH1) and a SS based nonlocal total variation function (SS-NLTV) for regularization of image restoration problems. Moreover, we employ iterative algorithms to solve these SS-NLH1 and SS-NLTV variational models numerically, and discuss the convergence of these algorithms. Experimental results are presented to demonstrate the effectiveness of the proposed models.

主讲人简介:

同济大学数学科学学院副教授,博士生导师。在应用数学和图像处理领域高水平杂志:SIAM Journal on Imaging Sciences,IEEE Transactions on Image Processing,SIAM Journal on Scientific Computing等发表多篇高质量论文,主持多项国家级、省部级科研项目,入选同济大学青年英才计划,同济大学优秀博士后,同济大学隧道奖教金获得者。

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