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| 一种纵横窗口关联的多级中值滤波算法 | |
| 引用本文： | 沈德海,刘大成,邢涛.一种纵横窗口关联的多级中值滤波算法[J].计算机科学,2012,39(5):246-248. |
| 作者姓名： | 沈德海 刘大成 邢涛 |
| 作者单位： | 1. 渤海大学信息科学与技术学院 锦州121000 2. 清华大学工业工程系 北京100084 3. 北京城市系统工程研究中心 北京100089 |
| 基金项目： | 国家自然科学基金，辽宁省教育厅重点实验室基金，北京市科学技术研究院创新团队计划 |
| 摘 要： | 针对传统中值滤波算法不能很好保护图像细节以及受较严重噪声污染时性能急剧下降的情况,提出了一种纵横窗口关联的多级中值滤波算法。算法采用开关策略,判断N×N窗口内像素点。对于噪声点,先求出以该点为中心的纵横2 N个窗口中每个窗口像素点的中值,再计算出这些中值点的中值,以替换噪声点像素值。对于非噪声点,保持原值不变,从而实现了噪声的去除。仿真结果表明,纵横窗口关联的多级中值滤波算法具有较好的细节保护能力和较强的去噪声能力。 |
| 关 键 词： | 纵横窗口关联 椒盐噪声 多级中值滤波 噪声检测 |
Multilevel Median Filter Algorithm Based on Vertical and Horizontal Windows Relation |
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| SHEN De-hai , LIU Da-cheng , XING Tao.Multilevel Median Filter Algorithm Based on Vertical and Horizontal Windows Relation[J].Computer Science,2012,39(5):246-248. | |
| Authors: | SHEN De-hai LIU Da-cheng XING Tao |
| Affiliation: | 3(College of Information Science and Technology,Bohai University,Jinzhou 121000,China)1(Department of Industrial Engineering,Tsinghua University,Beijing 100084,China)2(Beijing Research Center of Urban Systems Engineering,Beijing 100089,China)3 |
| Abstract: | A multilevel median filter algorithm based on vertical and horizontal windows relation was proposed for the problem that traditional median filter algorithm can't protect the image detail very well, and that its performance will be in the sharp decline in dealing with high-density noise image. The algorithm determines the noise point of the image in window of NX N by using switching strategy. For the noise point, it's pixel value will be replaced by the median value of the median value in every window that lies in all 2N windows round the noise point. The pixel value will be retained for the non noise points. hherefore, we achieved noise removal and detail preservation. Experimental results indicate that the algorithm has better image detail preservation and strong denoising ability. |
| Keywords: | Vertical and horizontal windows relation Salt and pepper noise Multilevel median filter Noise detection |
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