| X射线探测器图像的恢复研究 |
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| 引用本文： | 李俊江,路宏年,李保磊.X射线探测器图像的恢复研究[J].光学技术,2007,33(1):113-115. |
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| 作者姓名： | 李俊江 路宏年 李保磊 |
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| 作者单位： | 北京航空航天大学,机械与自动化学院,北京,100083 |
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| 摘 要： | 图像退化是引起X射线探测器图像质量下降的主要原因。图像恢复,可以提高系统的分辨率和对比度灵敏度。通过对射线成像系统图像退化的分析,介绍了反滤波信号恢复方法,并提出了一种近似恢复算法,该算法将反滤波恢复近似为除法运算的恢复。给出了恢复前后的图像及标准差的对比,实验结果表明了该算法的有效性。
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| 关 键 词： | 射线成像 图像退化 图像恢复 线性移变系统 点扩展函数 反滤波 |
| 文章编号： | 1002-1582(2007)01-0113-03 |
| 收稿时间： | 2005/12/9 |
| 修稿时间： | 2005年12月9日 |
Research on image restoration about X-ray detector |
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| LI Jun-jiang,LU Hong-nian,LI Bao-lei.Research on image restoration about X-ray detector[J].Optical Technique,2007,33(1):113-115. |
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| Authors: | LI Jun-jiang LU Hong-nian LI Bao-lei |
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| Abstract: | The degradation of radiography is one of the important factors for X-ray detector.Imaging spatial resolution and contrast sensitivity can be improved by image restoration.By analysis on image degradation of X-ray imaging system, the restoration method of inverse filtering was introduced and an approximate restoration algorithm was proposed.The method approximately transforms inverse filtering algorithm into division algorithm.The images and the standard deviations for the images are given before and after restoration.The approximate restoration capability of the proposed solution is validated by experimental results. |
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| Keywords: | radiography image degradation image restoration linear shift-variant system point spread function inverse filtering |
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