气体腐蚀测试对安防用摄像头灰阶值的影响  

Influence of Gas Corrosion Testing on Gray Scale of Security Camera

作　　者：王婷婷[1] 许毅[1] 李嘉[1] WANG Ting-ting;XU Yi;LI Jia(Shanghai Institute of Quality Inspection and Technical Research,Shanghai 201114)

机构地区：[1]上海市质量监督检验技术研究院,上海201114

出　　处：《环境技术》2022年第5期108-112,共5页Environmental Technology

基　　金：上海市科委《20DZ2290900上海市数字电子产品检测专业技术服务平台》;上海市市场监督管理局《2021-41基于量子人工智能的在役光学成像系统实时成像质量评估方法研究(一期)》项目资助

摘　　要：安防类摄像头被广泛使用,随着环境的长期老化和服役时间的延长,其成像质量不可避免会发生下降。但鲜有环境老化测试对其成像质量影响的研究。本文聚焦图像质量的灰阶值,考虑到摄像头使用环境的复杂性,分析了气体腐蚀测试前后典型光学成像系统在不同光照条件下的成像质量。研究发现,环境测试后,成像系统的灰阶分辨能力下降。另外,光照条件对其灰阶分辨能力影响较大。在光学补偿情况下,灰阶值明显降低,摄像头不能很好的进行灰阶分辨。本文使用了透射式标板法和反射式标板法两种测试方法进行灰阶值分析。研究发现,两种方法结果是自洽的。The security camera is widely used.With the long-term aging effect of the environment and the increase in service time,its imaging quality will inevitably decrease.However,there are few research on the impact of environmental aging tests on its imaging quality.This article focuses on the gray scale level of image quality.Considering the complexity of the use environment of the camera,the imaging quality of the typical optical imaging system before and after the gas corrosion testing is analyzed.At the same time,the impact of different light source conditions is also considered here.Studies have found that after environmental testing,the gray scale resolution ability of the imaging system decreases.In addition,light source conditions have a greater impact on its gray scale resolution ability.In the case of optical compensation,the gray scale value is significantly reduced,and the camera cannot perform gray scale resolution.In this paper,two test methods,transmitted standard board method and reflective standard board method,are used to analyze the gray scale value.Studies have found that the results of the two methods are self-consistent.

关 键 词：成像分辨率 盐雾测试 光学成像系统 

分 类 号：TN919.82[电子电信—通信与信息系统]