| 数字图像相关技术的综合算法及其在断裂力学中的应用 |
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| 引用本文： | 唐晨,闫海青,云大真,邢昌玉,张皞. 数字图像相关技术的综合算法及其在断裂力学中的应用[J]. 光学技术, 2003, 29(1): 69-72 |
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| 作者姓名： | 唐晨 闫海青 云大真 邢昌玉 张皞 |
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| 作者单位： | 1. 天津大学,应用物理系,天津,300072
2. 大连理工大学,工程力学系,大连,116024 |
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| 基金项目： | 中国博士后基金资助，辽宁省博士启动基金资助(编号:001004) |
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| 摘 要： | 鉴于散斑图的随机噪声和相关搜索运算过程仍是当今影响相关图像技术所获结果精度与计算速度两大有待研究解决的主要问题,提出一种基于小波变换、序惯相似度检测和统计相关算法三者相结合的新算法。其基本原理是应用小波变换对变形前后的散斑图进行滤波平滑处理;利用序惯相似度检测算法进行粗搜索,找到可能的匹配点;在可能的匹配点应用统计相关法进行细搜索,最终找到匹配点的位置。基本实验、计算和应用表明,这种算法在消除噪声和提高运算速度等方面,取得了良好的效果。
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| 关 键 词： | 序惯相似性检测算法 离散小波变换 数字图像相关法 应力强度因子 |
| 文章编号： | 1002-1582(2003)01-0069-04 |
| 修稿时间： | 2002-04-29 |
A new synthetical algorithm for digital image correlation method and its application in the fracture |
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| Abstract: | The random noise of speckle images and correlative searching calculation are main reasons that affect the accuracy and the calculation speed. A new digital correlation algorithm was proposed based on the synthetical uses of wavelet multiresolution, sequence similarity detection algorithm(SSDA) and statistical correlation method. Its basic principle is that filtering was conducted on speckle images by means of wavelet multiresolution, then, sequence similarity detection algorithm(SSDA) is adopted to perform rough searching, and possible matching points were quickly found. Finally, statistical correlation method was applied to perform fine searching on possible matching points. The testing and application results show that the method gains favorable effects on the noise filtering and improvement for calculation speed. |
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| Keywords: | digital image correlation method wavelet multiresolution sequence similarity detection algorithm(SSDA) statistical correlation method stress intensity factor |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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