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| TDI-CCD图像传感器的噪声分析与处理 | |
| 引用本文： | 李云飞,李敏杰,司国良,郭永飞.TDI-CCD图像传感器的噪声分析与处理[J].光学精密工程,2007,15(8):1196-1202. |
| 作者姓名： | 李云飞 李敏杰 司国良 郭永飞 |
| 作者单位： | 1. 中国科学院,长春光学精密机械与物理研究所,吉林,长春,130022;中国科学院,研究生院,北京,100039 2. 长春工业大学,吉林,长春,130012 3. 中国科学院,长春光学精密机械与物理研究所,吉林,长春,130022 |
| 摘 要： | 为提高TDI-CCD的工作性能,根据TDI-CCD器件的工作原理,较完整地分析了TDI-CCD图像的噪声组成,给出了其噪声的详细分类。TDI-CCD 的噪声主要来自两个方面,一个是TDI-CCD器件本身所固有的噪声,如霰粒噪声、非均匀性噪声、暗电流噪声、固定图形噪声、转移噪声等,另一个是TDI-CCD工作过程中的各种噪声干扰,如复位噪声和1/f噪声等。根据各种噪声的特点,提出了相应的噪声处理技术,并针对KTC噪声,给出了双相关采样电路处理方式,提高了器件的信噪比,输出信噪比达到53.8 dB。 |
| 关 键 词： | TDI-CCD 图像传感器 暗电流噪声 KTC噪声 相关双采样 |
| 文章编号： | 1004-924X（2007）08-1196-07 |
| 收稿时间： | 2007-05-22 |
| 修稿时间： | 2007-05-222007-07-18 |
Noise analyzing and processing of TDI-CCD image sensor |
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| LI Yun-fei,LI Min-jie,SI Guo-liang,GUO Yong-fei.Noise analyzing and processing of TDI-CCD image sensor[J].Optics and Precision Engineering,2007,15(8):1196-1202. | |
| Authors: | LI Yun-fei LI Min-jie SI Guo-liang GUO Yong-fei |
| Affiliation: | 1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China ;3. Changchun University of Technology ,Changchun 130012, China |
| Abstract: | In order to improve TDLCCD performance, the noise in TDI-CCD image was analyzed and categorized according to the operating principle of TDI-CCD. TDI-CCD noise mainly comes from two ways, one is TDI-CCD proper noise, such as photo shot noise, non-uniformity noise, clark current noise,fix pattern noise, transfer noise and so on, the other is TDI-CCD noise interference in work process, such as reset noise and 1/f noise. Several noise processing methods were presented based on noise charateristics and the signal processing schemes of double-correlated sampling were given to eliminate KTC noise. As a result, the output SNR of TDI-CCD has reached up 53.8 dB. |
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