武汉光电论坛第158期

报告题目：从二维至三维互相关：光学方法与性能评估

Taking Correlation from 2D to 3D: Optical Methods and Performance Evaluation

时 间：2019年5月30日15:00-17:00

地 点：武汉光电国家研究中心A101

报 告 人：Prof. Partha P. Banerjee，美国戴顿大学

邀 请 人：付 玲 教授

报告人简介：

Partha P. Banerjee, 美国戴顿大学光电系现任系主任、教授。2000-2005年，曾任戴顿大学电子与计算机工程系系主任。在戴顿大学任职之前，1991-2000年，他任职于阿拉巴马大学汉茨维尔分校，1984-1991年任职于雪城大学。研究领域主要包括：数字与动态全息成像，光致折射材料，光学超材料，非线性光学，以及光学捕捉。Banerjee教授为美国光学学会（OSA）会士、国际光学工程学会（SPIE）会士、物理学会（FInstP）会士、电气与电子工程师协会高级会员。他曾于1987年获得美国国家科学基金会青年学者奖。在戴顿大学，他建立了全息成像与超材料实验室（HAM）。他分别于2010、2016、2019年组织了关于数字全息成像的OSA国际会议，并于2012-2016担任Applied Optics专题编辑。2014-2016年，他曾任OSA环境监测委员会主席。迄今为止，Banerjee教授已出版5本专著，超过135篇期刊论文，超过150篇/场会议论文/报告，以及一项专利。他已指导24位博士与16名硕士获得学位。他还积极参与了华中科技大学工程科学学院、光电学院的国际合作交流，建立了学生交换、人才培养的新项目。

Biography:

Partha P. Banerjee is Professor and Chair of the Department of Electro-Optics and Photonics (EOP) at the University of Dayton (UD), and Professor of Electrical and Computer Engineering (ECE) where he was Chair from 2000-2005. Prior to UD, he was with the University of Alabama in Huntsville from 1991-2000, and with Syracuse University from 1984-1991. His research interests include digital and dynamic holography, photorefractives, optical metamaterials, nonlinear optics, and optical trapping. He is Fellow of Optical Society of America (OSA), International Society of Photonics Engineers (SPIE) and the Institute of Physics (FInstP), and senior member of Institute of Electrical and Electronic Engineers (IEEE). He received the NSF Young Investigator Award in 1987.

At UD, Dr. Banerjee established the Holography and Metamaterials (HaM) lab. He has organized the OSA international meeting on Digital Holography in 2010, 2016 and 2019, and was Topical Editor for Applied Optics from 2012-2016. He was also Chair of the OSA Environmental Monitoring Committee from 2014-2016. To date, Dr. Banerjee has published 5 textbooks, over 135 refereed journal papers, and over 150 conference papers/ presentations, and holds 1 patent. He has supervised 24 PhD dissertations and 16 MS theses. He also actively participated in the international cooperation of the School of Engineering Sciences (SES) and the School of Optical and Electronic Information (SOEI) of Huazhong University of Science and Technology (HUST), and established new programs for student exchange and talent cultivation.

报告摘要：

报告首先将回顾利用光致折射材料的二维互相关。基于光致折射光束耦合的联合变换相关器，其性能将通过品质参数（例如：差别比、峰-相关能量平面比、峰-噪声比等）对光致折射增益参数、典型参考光的光束比以及信号图像的依赖来决定。此外，三维图像的互相关将通过它们的二维数字全息的互相关引入。用来评估二维图像互相关的重要品质参数将应用于全息图的互相关。品质参数将通过作为二维图像的数字记录全息图以应用于物体高度的鉴定。基于获得的结果以及对应的品质参数作为评估标准，结果展示了对物体表面高度精确识别的前景。

Abstract:

Correlation of two dimensional (2D) images using photorefractive materials are first reviewed. The performance of a joint transform correlator based on photorefractive beam coupling is analyzed by determining the dependence of typical figures of merit such as the discrimination ratio, peak-to-correlation plane energy ratio, peak-to-noise ratio, etc. on the photorefractive gain coefficient and beam power ratio using typical reference and signal images. Furthermore, correlation of three dimensional (3D) images is introduced as the correlation of their 2D digital holograms. Critical figures of merit used for assessment of 2D correlation of images are applied to the correlation of holograms. Figures of merit are applied for object height identification using digitally recorded holograms as the 2D images. Results show the potential for accurate object height recognition based on obtained results corresponding to figures of merit as an assessment metric.

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