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AltaU9000相机噪声的测试与分析

Noise test and analysis of scientific grade CCD camera Alta U9000
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摘要 CCD在成像过程中不可避免地引入一定的噪声,这些噪声将对以图像检测为基础的CCD各种工程应用带来误差。本文分析了各种CCD噪声的来源及其数学性质,并对科学级CCDAltaU9000相机的各种噪声进行了量化分析,给出了暗电流噪声、成像电路噪声及随机噪声的变化规律;对不同积分时间的图像进行了噪声抑制实验。实验证明,根据对U9000CCD噪声的预先测试数据,其噪声中的暗电流噪声、成像电路噪声等系统噪声可以得到很大的抑制,而随机噪声无法抑制。 In the imaging processing of CCD, some noises will be generated inevitably. These noises could influence the precision of many CCD engineering applications based on image tests. The sources and the mathematical properties of CCD noises were analyzed in the paper. And the noises of different categories of scientific grade CCD Alta U9000 were analyzed quantitatively. The changing law of the dark current noise, the imaging circuit noise and the random noise and some calculating formulas were presented then. The ex- periments of different exposure time to restrain the noises were made finally. It was proved that the system noises such as dark current noise and imaging circuit noise, not the random noise, could mainly be eliminated.
作者 原玉磊 郑勇 张超 YUAN Yu-lei, ZHENG Yong, ZHANG Chao ( Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052, China)
出处 《测绘科学》 CSCD 北大核心 2013年第5期119-121,共3页 Science of Surveying and Mapping
基金 国家自然科学基金项目(10878025)
关键词 噪声测试 科学级CCD Alta U9000 读出噪声 暗电流噪声 噪声消除 noise test scientific grade CCD Alta U9000 readout noise dark current noise noise elimination
作者简介 原玉磊(1984-),男,博士研究生,主要研究方向为大地测量学与测量工程。E—mail:wei_confucian@163.com
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