基于CMOS结构与感光度对电子内窥镜图像宽容度与信噪比的分析研究  

Analysis and research of image dynamic range and SNR of electronic endoscope based on CMOS structure and ISO sensitivity

作　　者：袁青 陈成新[1] 许云超 杜江齐[1] 高英哲 YUAN Qing;CHEN Chengxin;XU Yunchao;DU Jiangqi;GAO Yingzhe(Shenzhen Academy of Metrology and Quality Inspection,Shenzhen 518000,China)

机构地区：[1]深圳市计量质量检测研究院,广东深圳518000

出　　处：《工业计量》2023年第6期6-9,共4页Industrial Metrology

基　　金：国家市场监督管理总局科技计划项目(2021MK125)。

摘　　要：文章的研究对象是电子内窥镜的静态图像宽容度与信噪比指标,探究CMOS结构与感光度的调节对图像噪声来源的分析,通过试验得到静态图像宽容度与信噪比随感光度的增大而减小,在感光度为100时,测得最大信噪比与静态图像宽容度分别为40.712 dB和338.8。提高进光量水平能显著减少光子散粒噪声对图像信噪比的干扰,这一策略为电子内窥镜产品的研发分析、测试评价及修改提供参考依据。This paper aiming at the dynamic range and signal-to-noise ratio(SNR)indexes of electronic endoscopes,this article analyses the sources of image noise by CMOS structure and the adjusting of ISO sensitivity,and obtains that the dynamic range and signal-to-noise ratio decrease with the increase of ISO sensitivity,and the maximum signal-to-noise ratio and dynamic range are 40.712 dB and 338.8 respectively when the ISO sensitivity is 100.Increasing the input luminance can significantly reduce the interference of photon shot noise on the image signal-to-noise ratio,which provides a reference for the development,analysis,quality detection and modification of electronic endoscope products.

关 键 词：电子内窥镜 感光度 图像宽容度 信噪比 

分 类 号：TH77[机械工程—仪器科学与技术]