光学学报, 2018, 38 (4): 0411006, 网络出版: 2018-07-10
基于数字微镜成像系统的响应曲线标定方法研究 下载: 800次
Research on Response Curve Calibration Method of Imaging System Based on Digital Micromirror Device
成像系统 响应曲线 标定 高动态范围 数字微镜器件 imaging systems response curve calibration high dynamic range digital micromirror device
摘要
高动态范围成像技术是当前光学成像领域的研究热点。基于数字微镜器件(DMD)具有调制入射光线空间信息的特性,设计了一种DMD相机,可提高成像系统的动态范围。同时,为了合理有效地编码控制DMD,根据该成像系统的结构及成像特征,利用数学分析方法先后标定了DMD调光响应曲线和CMOS图像探测器的响应曲线,并在此基础上提出基于DMD相机的响应曲线标定方法。实验表明,该成像系统突破了普通数字相机动态范围的限制,动态范围可提高至96 dB以上。同时,还完成了DMD相机响应函数的快速标定,为实现DMD掩模的自适应调整提供了重要依据。
Abstract
High dynamic range imaging technology is a research hotspot in the field of optical imaging. Digital microscopy device (DMD) has the characteristics of modulation incident ray spatial information. A high dynamic range imaging system with high-resolution is developed based on DMD, which could improve the dynamic range of the imaging system. At the same time, in order to reasonably and effectively control the DMD, the response curve of DMD modulation and CMOS image detector are calibrated by using mathematical analysis method, and the response curve calibration method of DMD camera is proposed according to the structure and imaging characteristics of the imaging system. The experimental results show that the imaging system has a dynamic range larger than the ordinary ones, which can reach more than 96 dB. The fast response function calibration of the DMD camera is also completed, which provides the powerful foundation for the adaptive adjustment of the DMD mask.
冯维, 曲兴华, 王惟婧, 张福民. 基于数字微镜成像系统的响应曲线标定方法研究[J]. 光学学报, 2018, 38(4): 0411006. Wei Feng, Xinghua Qu, Weijing Wang, Fumin Zhang. Research on Response Curve Calibration Method of Imaging System Based on Digital Micromirror Device[J]. Acta Optica Sinica, 2018, 38(4): 0411006.