成像系统的光学/数字处理联合设计方法研究

项目名称： 成像系统的光学/数字处理联合设计方法研究

项目编号： No.61505219

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 谭政

作者单位： 中国科学院光电研究院

项目金额： 20万元

中文摘要： 成像系统的传统设计方法主要包括两个步骤，首先根据像差理论设计光学系统获得目标图像，然后设计数字图像处理算法修正图像的剩余缺陷。其局限性在于：①光学设计中每种像差必然都会有一定的残留；②数字图像处理算法难以同时兼顾信噪比和对比度的提升，图像复原存在求解病态性；③光学设计参数和数字图像处理设计参数之间关联度较弱。导致成像系统设计难以实现光学系统和图像处理算法的整体最优。.针对以上不足，本项目通过深入分析各种光学像差作用的物理机制和数学特性，提出适用于像差校正的数字图像处理算法，并将该像差校正算法作为光学设计的补充，建立具有通用性的光学/数字处理联合设计方法，使数字图像处理设计参数与光学设计参数能够相互联系，将光学系统和图像处理算法作为整体进行设计和优化，实现从目标到图像的最优化设计。本项目用数字处理分担了光学系统的部分压力，在一定程度上放宽了对光学系统的严格限制，为成像系统的简化设计奠定基础。

中文关键词： 光学成像系统；光学系统设计；数字图像处理设计；像差数字校正；联合设计

英文摘要： Traditional techniques for designing optical imaging systems involves two stages: the optical system is designed to produce the image based aberration optimization, and then, the digital image processing algorithm is designed to correct remaining defects in that image. There are three limits in traditional design. First, due to vast amount of orders of each aberration, as well as restricted by machining technology, adjustment method and glass materials, each kind aberration in the optical design will have some inevitable residuals. Second, for digital image processing algorithm, the signal to noise ratio and the image contrast cannot be enhanced simultaneously, and image restoration is classified as an ill-posed problem. Third, the optical design parameters is weaker correlations with digital image processing design parameters. These three limits lead the imaging system cannot perform global optimizatiom on both optical system and image processing algorithm..To solve the above contradiction, we propose a digital image processing algorithm for aberration correction through analyzes the physical mechanisms and mathematical properties of each aberration. And make this aberration correction algorithm as the supplement of the optical design, to propose a method in which both the optics and the image processing are jointly adjusted simultaneously for global system optimization. The project use the digital image processing algorithm to share the pressure with optical system, to some extent this will relax strict restrictions on the optical system, our research would lay the foundation for simplified design of the imaging system.

英文关键词： optical imaging system;optical system design;image processing design;aberration correction algorithm;co-design