基于激光演示技术的多源数字成像系统设计

Design of multi-source digital imaging system based on laser demonstration technology

针对传统成像系统成像质量差、获取信息单一且采样次数多的问题,设计了基于激光演示技术的多源数字成像系统。分析激光演示技术原理,通过激光增感屏转换成可见光,设计多源数字成像系统,利用数字图像块效应对图像实施质量检测,并评价图像失真程度。根据TDI工作原理,提出卷帘数字域TDI算法,采用逐行叠加的方法实现图像移动速度与推扫速度的准确匹配。对CMOS传感器驱动时序控制参数实施运算,以满足数字域TDI的要求,并根据FPGA控制实现数字图像的积累,完成多源数字成像系统的有效设计。实验结果表明,所提系统能够获得高质量的图像,且成像时间较短,具有高效性、适用性。

Aiming at the problems of poor imaging quality,single information acquisition and many sampling times of traditional imaging system,this paper designs a multi-source digital imaging system based on laser demonstration technology.This paper analyses the principle of laser demonstration technology,transforms the laser intensifying screen into visible light,designs a multi-source digital imaging system,uses the digital image block effect to detect the image quality,and evaluates the degree of image distortion.According to the working principle of TDI,a digital domain TDI algorithm of roller shutter is proposed.The line-by-line superposition method is used to realise the accurate matching of the image moving speed and push scanning speed.The timing control parameters of the CMOS sensor drive are cal-culated to meet the requirements of digital TDI,and the accumulation of digital image is realised according to FPGA control,and the practical design of a multi-source digital imaging system is completed.The experimental results show that the proposed system can obtain high-quality images with short imaging time,high efficiency and applicability.