| 椭圆目标的亚像素边缘定位方法研究 |
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| 引用本文： | 张虎,达飞鹏,李勤,邢德奎.椭圆目标的亚像素边缘定位方法研究[J].光学技术,2010,36(1). |
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| 作者姓名： | 张虎 达飞鹏 李勤 邢德奎 |
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| 作者单位： | 东南大学,自动化研究所,南京,210096 |
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| 基金项目： | 国家自然科学基金资助项目(60775025);;江苏省自然科学基金资助项目(BK2007116) |
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| 摘 要： | 分析和比较了三种常见的基于矩的亚像素边缘定位方法,得出三种方法获取的边缘角度以及OFMM法与ZOM法获取的亚像素边缘相同的结论。提出了一种针对椭圆目标的亚像素边缘定位方法。在ROI提取和SOBEL算子初步检测边缘的基础上,利用初步获取的椭圆目标的几何信息,将参与计算的模板个数减少至一个,从而大大减少了运算时间,提高了算法的运算速度。同时实验结果表明,与其他基于矩的亚像素边缘定位方法相比,新方法不仅有更高的运算速度,而且精度和抗噪性能都有很大地提高。
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| 关 键 词： | 光学测量 矩 边缘定位 亚像素 图像处理 |
Methods of sub-pixel edge location for ellipse |
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| ZHANG Hu,DA Fei-peng,LI Qin,XING De-kui.Methods of sub-pixel edge location for ellipse[J].Optical Technique,2010,36(1). |
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| Authors: | ZHANG Hu DA Fei-peng LI Qin XING De-kui |
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| Institution: | Research Institute of Automation;Southeast University;Nanjing 210096;China |
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| Abstract: | Analysis and comparisons for three common methods for sub-pixel edge location based moment are made.The results of edge-angle computed by the three moment-based methods are all the same.Moreover,the results of sub-pixel edge location computed by OFMM method and ZOM method are also the same.A novel method for sub-pixel edge of ellipse is proposed.Based on ROI extraction and coarsely edge-location by SOBEL operator,the geometric information of the target is used to reduce the number of moment-template to be o... |
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| Keywords: | optical measurement moment edge location sub-pixel image processing |
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