项目名称： 基于光场测量的高清晰成像方法探索研究

项目编号： No.61775239

项目类型： 面上项目

立项/批准年度： 2018

项目学科： 无线电电子学、电信技术

项目作者： 马浩统

作者单位： 中国人民解放军国防科技大学

项目金额： 16万元

中文摘要： 由于大气湍流和其它像差的影响，光学望远镜的实际分辨率远远达不到光学衍射极限，且成像易受遮挡的影响。采用基于光场测量的成像结构，并结合实时的图像处理算法提高成像图像的清晰度，有望是解决大气湍流和部分遮挡影响，实现高清晰成像的一条重要途径。与传统自适应光学成像相比，具有结构简单、光能利用率高、成本低、适用于部分遮挡扩展目标成像等优点；与传统图像后处理相比，具有信息丰富、计算量小、实时性好等优点。本项目拟采用理论分析和实验验证相结合的方法，系统深入研究新成像结构的成像机理、成像图像与大气湍流及部分遮挡之间的关系、数据处理算法等问题。基于光场阵列清晰化成像和光场波前测量与传统成像的图像高清晰复原，建立基于光场测量的高清晰成像数学物理模型、数值仿真平台和实验系统。讨论同时存在大气湍流影响和部分遮挡影响的扩展目标高清晰成像，研究成像图像像质评价，评估系统的极限成像能力，为该技术的实用化奠定基础。

中文关键词： 光场成像；光场阵列成像；波前测量；图像清晰化；扩展目标

英文摘要： Because of atmospheric turbulence and other optical aberrations, the actual imaging resolution of optical telescope cannot reach the optical diffraction limitation and is vulnerable to occlusion. The imaging technique based on the combination of plenoptic measurement structure and real-time image processing method is expected as one important way to realize high resolution imaging, which has the ability to solve the atmospheric turbulence and partial occlusion. Compared with conventional adaptive optical imaging techniques, this method has the advantages of simple structure, high light efficiency, low cost, and is suitable for the imaging of the partially occluded extended targets. Compared with the conventional image post-processing techniques, this method has the advantages of abundant information, less calculation, real time and etc. Based on the combination of theoretical analysis and experimental verification, imaging mechanism of the new imaging structure, the relationship between imaging quality and atmospheric turbulence and partial occlusion, data processing algorithm would be studied in detail in this project. Based on the combination of high resolution optical field array imaging and high resolution image restoration by using plenoptic wavefront measurement and traditional imaging, we will establish the mathematical model, numerical simulation platform and experimental system of high resolution imaging with plenoptic measurement. The high resolution imaging of extended targets with atmospheric turbulence and partial occlusion, image quality evaluation and the system's limiting imaging ability evaluation will also be studied in detail. The conclusions of this study can establish a foundation for the practical application of the technology of high resolution imaging based on plenoptic measurement.

英文关键词： Plenoptic imaging;Optical array imaging;Wavefront measurement;Image sharpening;Extended target