基于FPGA的微光成像系统的研究  

Research on Low-light-level Imaging System Based on FPGA

作　　者：黄少肃 陈文明 沈健 HUANG Shaosu;CHEN Wenming;SHEN Jian(Department of Physics,Anhui Normal University,Wuhu Anhui 241000,CHN;AVIC Huadong Optoelectronics Co.,Ltd,Wuhu Anhui 241002,CHN;National Engineering Laboratory of Special Display Technology,Wuhu Anhui 241002,CHN)

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241001 [2]中航华东光电有限公司,安徽芜湖241002 [3]特种显示技术国家工程实验室,安徽芜湖241002

出　　处：《光电子技术》2022年第2期112-118,共7页Optoelectronic Technology

摘　　要：设计并搭建了一种微光成像系统,包含硬件部分和逻辑部分,采用以FPGA为核心的图像信号处理模块,结合图像采集模块、接口模块、光学镜头、GAMMA校正、图像滤波处理算法以及MultiBoot。相关实验结果表明,微光成像系统可以通过FPGA对微光CMOS图像传感器进行控制,以采集不同照度下的微光图像;上位机借助串口,通过在线加载功能,可实现对FPGA程序的更新;在0.001 lux的环境下,输出的微光图像分辨率不小于1.0 mrad,图像可实现信息判读,所得结果能够解决人眼在夜晚无法获取信息的问题。Under the condition of extremely low illumination,the images collected by the lowlight CMOS image sensor generally has the problems of excessive noise,deviation of brightness,and difficulty in updating the system program after assembly.In view of this,a low-light-level imaging system,including hardware and logic,was designed and built,by using an image signal processing module with FPGA as the core,and combining with image acquisition module,interface module,optical lens,GAMMA correction,image filtering processing algorithm and MultiBoot.Related experimental results showed that the low-light-level imaging system could control the low-light-level CMOS image sensor through FPGA to collect low-light images under different illuminations.The host computer could use the serial port to update the FPGA program through the online loading function.It was testified that in the environment of 0.001 lux,the output low-light image resolution was not less than 1.0mrad,the image could realize information interpretation,and the results could help solve the problem that the human eye could not obtain information at night.

关 键 词：图像处理 微光成像系统 现场可编程门阵列 在线加载 

分 类 号：TN223[电子电信—物理电子学]