中国科学院机构知识库网格
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基于1mcpss码速率的亚欧卫星双向时间比对性能分析 期刊论文  OAI收割
天文学报, 2019, 卷号: 60, 期号: 6
作者:  
王翔;  董绍武;  武文俊;  宋会杰;  王威雄
  |  收藏  |  浏览/下载:83/0  |  提交时间:2020/11/09
Techniques for Pixel Response Nonuniformity Correction of CCD in Interferential Imaging Spectrometer 期刊论文  OAI收割
spectroscopy and spectral analysis, 2010, 卷号: 30, 期号: 6, 页码: 1712-1716
作者:  
Yao Tao;  Yin Shi-min;  Xiangli Bin;  Lue Qun-bo
收藏  |  浏览/下载:17/0  |  提交时间:2015/09/21
Non-uniformity correction in multi-CCD imaging system (EI CONFERENCE) 会议论文  OAI收割
2010 2nd International Conference on Mechanical and Electronics Engineering, ICMEE 2010, August 1, 2010 - August 3, 2010, Kyoto, Japan
Tao M.; Ren J.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
The non-uniformity phenomenon exists in each channel of multi-CCD imaging systems. The factors which lead to the problem are complex. The conventional calibrating algorithms can not consider all of these factors and have poor effects. According to the characters of multi-CCD imaging systems  a non-uniformity correction method based on the scene was proposed by adopting the traditional two-point correction theories. The correction coefficient of each channel image can be calculated via the linear relation between the two neighboring pixel lines in the two-channel images. Compared with the conventional two-point calibration and multi-point calibration methods  contrastive calibrating results were obtained. This method does not need any standard lighted image as reference source  which provides a real time way for calibrating the multi-CCD imaging systems in practical applications. 2010 IEEE.  
Error analysis and accuracy validation of two-point calibration for microwave radiometer receiver 期刊论文  iSwitch采集
Journal of infrared and millimeter waves, 2007, 卷号: 26, 期号: 4, 页码: 289-292
作者:  
Luan Hui;  Zhao Kai
收藏  |  浏览/下载:14/0  |  提交时间:2019/05/10
Research on the nonuniformity correction of linear TDI CCD remote camera (EI CONFERENCE) 会议论文  OAI收割
Advanced Materials and Devices for Sensing and Imaging II, November 8, 2004 - November 10, 2004, Beijing, China
Ya-xia L.; Zhi-hang H.
收藏  |  浏览/下载:24/0  |  提交时间:2013/03/25
Many applications  such as industrial inspection and overhead reconnaissance benefit from line scanning architectures where time delay integration (TDI) significantly improves sensitivity[5]. Images with linear response have become the backbone of the imaging industry. But each pixel of the TDI CCD has unique light sensitivity characteristics. Because these characteristics and the lens of the optical system affect camera's linearization and its performance  they must be removed through calibration. The process by which a CCD image is calibrated is known as nonuniformity correction. This paper discusses several methods of nonuniformity correction[2]. The first is one-point correction technique  which requires only one calibration point. This approach is to shift each curve toward the nominal curve by subtracting the offset from or adding the offset to the average. The second is two-point correction technique  which requires two calibration points. Each point is rotated and aligned so that all the detectors have the same response under the same radiance. The third is multipoint correction. It is recommended that more calibration points be implemented at appropriate regions of the response curve. Depend on the linear photoelectric response of the TDI CCD  we use two-point calibration and the standard deviations for the images are given before and after the correction.