| MSC794型CCD相机点扩展函数及噪声响应特性的测量 |
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| 引用本文： | 郭亚嫘,付小峰,邹化民. MSC794型CCD相机点扩展函数及噪声响应特性的测量[J]. 暨南大学学报(自然科学与医学版), 2006, 27(5): 693-698 |
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| 作者姓名： | 郭亚嫘 付小峰 邹化民 |
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| 作者单位： | 武汉大学物理科学与技术学院,湖北,武汉,430072;武汉大学物理科学与技术学院,湖北,武汉,430072;武汉大学物理科学与技术学院电子显微镜中心,湖北,武汉,430072 |
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| 摘 要： | 用白噪声方法测量了JEOL JEM2010(FEF)透射电子显微镜配备的MSC794型CCD相机的点扩展函数PSF(point spread function).在恒定的均匀入射电子束强度下,用改变曝光时间的方法改变CCD相机的曝光量(计数)的方法,得到了该CCD相机的噪声响应特性.将测量结果用于图像复原,得到了衬度更好的电镜图像.复原之后的图像数据,可以用作定量电子显微学分析.
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| 关 键 词： | CCD相机 点扩展函数 噪声 图像复原 |
| 文章编号： | 1000-9965(2006)05-0693-06 |
| 收稿时间： | 2005-12-22 |
| 修稿时间： | 2005-12-22 |
Measurements of point sprvead function and noise response characteristics of MSC794-type CCD cameras |
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| GUO Ya-lei,FU Xiao-feng,ZOU Hua-min. Measurements of point sprvead function and noise response characteristics of MSC794-type CCD cameras[J]. Journal of Jinan University(Natural Science & Medicine Edition), 2006, 27(5): 693-698 |
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| Authors: | GUO Ya-lei FU Xiao-feng ZOU Hua-min |
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| Affiliation: | 1. College of Phgsics and Technolagy; 2. Center of Electron Microsoope, Wuhan University, Wuhan 430072, China |
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| Abstract: | The point spread function(PSF) of a MSC794 CCD camera in JEOL JEM2010(FEF) transmission electron microscope is measured accurately with white noise method.The noise response characteristic is obtained by changing exposure time and counts of CCD camera under constant illumination intensity.The measurement results are applied in image restoration and an image with better contrast is obtained.The data of restored image can be used in quantitative electron microscopy analysis. |
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| Keywords: | CCD camera point spread function noise image restoration |
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