| Zernike矩和最小二乘椭圆拟合的亚像素边缘提取 |
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| 引用本文： | 祝宏,曾祥进. Zernike矩和最小二乘椭圆拟合的亚像素边缘提取[J]. 计算机工程与应用, 2011, 47(17): 148-150. DOI: 10.3778/j.issn.1002-8331.2011.17.040 |
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| 作者姓名： | 祝宏 曾祥进 |
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| 作者单位： | 1.华中科技大学文华学院 信息科学与技术学部，武汉 430074 2.华中科技大学 控制科学与工程系，武汉 430074 |
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| 摘 要： | 为了提高微操作系统的装配精度，提出了一种新型的亚像素边缘检测和中心定位算法。应用Canny算子提取了微零件在像素级的边缘。应用Zernike矩对微零件进行亚像素级的边缘定位。采用最小二乘椭圆拟合定位微零件的中心位置。实验结果表明，该算法能够实现更高的定位精度和消耗更少的时间。
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| 关 键 词： | 亚像素边缘提取 Zernike矩 最小二乘椭圆拟和 中心定位 微操作 |
| 修稿时间： | |
Sub-pixel edge detection algorithm of Zernike moments and least-squares ellipse fitting |
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| ZHU Hong,ZENG Xiangjin. Sub-pixel edge detection algorithm of Zernike moments and least-squares ellipse fitting[J]. Computer Engineering and Applications, 2011, 47(17): 148-150. DOI: 10.3778/j.issn.1002-8331.2011.17.040 |
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| Authors: | ZHU Hong ZENG Xiangjin |
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| Affiliation: | 1.Department of Information Science & Technology，Huazhong University of Science & Technology Wenhua College，Wuhan 430074，China 2.Department of Control Science and Engineering，Huazhong University of Science and Technology，Wuhan 430074，China |
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| Abstract: | In order to improve the resolution and accuracy of micro-assembly systems, a novel sub-pixel edge detection and center localization algorithm for micro-parts is presented.Firstly, the invariant moments are employed to describe the feature of the micro parts.Then,the edge of micro parts at pixel level is extracted using Canny operator.Secondly,Zernike orthogo- nal moments are used to relocate the edge of microsize part at sub-pixel level.Lastly, least squares ellipse fitting is applied to position the center.Experiment results show that the algorithm can achieve higher location accuracy and constmae less time. |
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| Keywords: | subpixel edge extraction Zernike moments least squares ellipse fitting center location micromanipulation |
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