报告题目：Image Retinex Via Total Variation-Type-Based Model

报告人：庞志峰 副教授

报告时间：2019年5月22日（周三）08:30—10:30   

报告地点：suncitygroup太阳新城学术报告厅

报告摘要：Retinex theory deals with compensation for illumination effects in Retinex illusions, medical image intensity inhomogeneity and color image shadow effect etc.. Such ill-posed problem has been studied by researchers for decades. However, most exiting methods paid little attention to the noises contained in the images and lost effectiveness when the noises increase. The main aim of this paper is to present a general Retinex model to effectively and robustly restore images simultaneously corrupted by intensity inhomogeneity and noises. We propose a variational model based on a new image decomposition model, which models a given image as a combination of reflection, illumination and noises. The existence of the minimizers of our main model is shown. Furthermore, we design a fast and efficient alternating minimization algorithm for the proposed model, where all subproblems have the closed-form solutions. Applications of the algorithm to various gray images and color images with noises of different distributions yield promising results. Joint  with Prof. Yuping Duan and Lu Liu, Yuan Wang.

个人简介：庞志峰，河南大学suncitygroup太阳新城副教授, 硕士生导师。目前任河南省数字图形图像学会常务理事和秘书长, 并分别兼任该学会的智能精准放疗专业委员会和智能信息融合专业委员会副主委, 同时任中国生物医学工程学会医学人工智能专委会青年委员会委员和中国工业与应用数学学会数学与医学交叉委员会委员。主要研究图像处理中的数学理论与数值算法。主持国家自然科学基金1项, 参与国家自然科学基金2项, 国家重点基础研究发展计划(973项目)1项。现发表相关学术论文27篇(其中SCI收录25篇), 授权专利1项。 自2010年到国内外多地访问,  2010.06-2011.03, 南洋理工大学数学物理学院, 博士后; 2011.12-2012.12, 香港城市大学电脑科学系, 博士后; 2014.02月-2014.08, 中科院数学与系统科学研究生院, 访问学者; 2015.07-2015.08, 南开大学陈省身数学研究所, 访问学者; 2016.01-2016.02, 香港中文大学系统工程与工程管理系, 访问学者; 2016.08-2017.08, 利物浦大学(英国), 数学科学学院, 访问学者; 2018.01-2018.02, 香港理工大学访问学者。

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                                                                                                               2019年5月15日