| 图像测量中快速边缘亚像素定位研究 |
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| 引用本文： | 郎晓萍,刘力双.图像测量中快速边缘亚像素定位研究[J].工具技术,2009,43(3):89-92. |
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| 作者姓名： | 郎晓萍 刘力双 |
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| 作者单位： | 北京信息科技大学光电信息与通信工程学院,100192 北京市 |
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| 基金项目： | 北京市重点实验室(机电系统测控)开放课题 |
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| 摘 要： | 研究了一种图像测量中边缘点的快速亚像素定位的方法，采用先阈值分割再边缘提取进行粗定位，确定边缘点的像素级精度位置和边缘的方向，沿边缘点的边缘方向拓展像素，得到一定长度的灰度值向量，对向量进行处理实现边缘的亚像素定位。分别采用三次多项式拟合法、二次曲线拟合法和灰度矩法三种亚像素定位算法进行了理论分析和实验对比，结果表明，灰度矩算法具有较短的运行时间和较高的定位精度。
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| 关 键 词： | 图像测量 亚像素 边缘检测 |
Study on Fast Edge Sub-pixel Detection Method for Measurement Image |
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| Lang Xiaoping,Liu Lishuang.Study on Fast Edge Sub-pixel Detection Method for Measurement Image[J].Tool Engineering(The Magazine for Cutting & Measuring Engineering),2009,43(3):89-92. |
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| Authors: | Lang Xiaoping Liu Lishuang |
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| Affiliation: | Lang Xiaoping Liu Lishuang,School of Photoelectric Information , Communication Engineering,Beijing Information Science , Technology University,Beijing 100192,China |
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| Abstract: | A fast sub-pixel positioning mothed of edge points in image measurement is studied.Threshold segmentation and edge extract are successively used for approximate positioning.The pixel grey vector with a certain length was obtained by which the pixel level location of the edge point and the edge direction were determined,as well as the pixel was expanded along the edge direction of edge point.Consequently,the edge sub-pixel location was achieved by vector processing.Cubic polynomial fitting,quadratic curve fi... |
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| Keywords: | image measurement sub-pixel edge detection |
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