运动场景下激光三维强度关联成像研究
文献类型：学位论文
| 作者 | 薄遵望 |
| 学位类别 | 博士 |
| 答辩日期 | 2016 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 韩申生 |
| 关键词 | 运动场景，强度关联成像，激光三维，车载平台 |
| 其他题名 | Investigation of Laser Three Dimensional Ghost Imaging in Motion Scenes |
| 中文摘要 | 强度关联成像是一种利用热光场辐照目标，由一个无空间分辨能力的单像素探测器获取目标返回信号的涨落信息，通过涨落信息与探测热光场之间的二阶关联运算获取目标图像信息的非局域成像方法。这种新型的成像方式具有分辨率高、探测距离远、系统结构简单等优势，因此强度关联成像从诞生之日起便得到了广泛关注，尤其是在遥感成像领域的开发利用更是取得了显著进展。然而，强度关联成像属于一种凝视成像技术，一个目标场景的成像需要经过若干次探测采样才能完成，长时间的曝光不但会引起运动模糊，而且会加剧环境变化和系统震动等不确定因素的影响。因此相对运动环境中的成像能力是强度关联成像在发展应用过程中的一个核心问题，只有实现了大幅度的相对运动场景下的高质量成像，才能真正使这项新技术走入实际应用的视线。本论文对运动场景下的强度关联成像进行了系统研究，主要从技术方案和成像特点等方面对动态关联成像的关键技术进行了理论研究和实验验证。并根据遥感应用中的需求指标设计加工了一套基于汽车运动平台的激光三维强度关联成像实验样机。论文内容安排如下： 第1章，首先从激光三维成像雷达的角度介绍了激光三维强度关联成像的发展背景和研究现状。通过对目前各类激光成像雷达技术的概述总结，进一步明确了强度关联成像在遥感领域的优势及问题。 第2章，首先详细介绍了静态激光三维强度关联成像系统的基本原理和实施方案；其次对运动场景下强度关联成像的各项关键技术进行了系统研究和方案验证，其中主要包括不同视场下的动态关联成像方案，为实现快速成像而开展的高重频和多点接收研究，以及为克服快速成像导致的脉冲能量降低而开发的光子计数关联成像。明确了各项技术的特点和问题，为运动平台关联成像实验样机的研制提供了技术基础。 第3章，详细介绍了基于汽车运动平台的强度关联成像实验样机设计和加工工作。从总体结构、静态模块和跟踪模块三个方面分别介绍了样机各个部分的光机结构、电控系统和核心器件。 第4章，对运动场景下强度关联成像的特点和车载实验样机在设计加工过程中遇到的问题进行了概括总结。结合目前强度关联成像的发展状况对以后的研究方向和研究重点做了主观方面的规划和展望。 |
| 英文摘要 | Ghost imaging is a non-local imaging method that utilizes thermal light for illuminating and detects the fluctuation of the reflected signals with a single-pixel detector, objects’ information can be reconstructed by second-order intensity correlation between the detected fluctuation information and the illumination information. This unique imaging method has many advantages of high-resolution, distant detection and simple mechanism, so it has earned lots of attentions, especially in the field of remote sensing imaging. However, ghost imaging is a staring imaging technique, the imaging process for a certain scene usually needs plenty of samples, long exposure will result in the motion-deblurring and make a disadvantageous influence on the imaging quality. Thus, the imaging quality of ghost imaging in the situation of motion is a critical problem, and only by solving this problem perfectly, the practical application of ghost imaging may be meaningful. In this thesis, laser three dimensional ghost imaging in motion scenes is studied for the first time and we design and make a vehicle-borne testing system. The thesis is arranged as follows: In chapter 1, the background and research status of ghost imaging is introduced from the perspective of 3D imaging Ladar (Laser Detection and Ranging), and then make a conclusion of the merits and problems when ghost imaging technique is applied in the field of remote imaging. In chapter 2, firstly, the basic principle and implementation methods of static ghost imaging are introduced. Then, we make an investigation of the critical techniques for ghost imaging in the situation of moving scenes by theoretical and experimental study. Motion imaging methods based on different field of view, high pulse repetition frequency, multiple-input detection and photon counting ghost imaging are all introduced in this chapter. In chapter 3, a vehicle-borne testing system is introduced. The overall structure, static module and tracking module is introduced respectively from the aspects of optics, mechanics and electronics. In chapter 4, we take a brief discussion and summary of this thesis and made a plane for further study of ghost imaging. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/15980]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 薄遵望. 运动场景下激光三维强度关联成像研究[D]. 中国科学院上海光学精密机械研究所. 2016. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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