| 基于矩和曲率保持的圆形标志精确量测 |
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| 引用本文： | 周拥军, 寇新建. 基于矩和曲率保持的圆形标志精确量测[J]. 武汉大学学报 ( 信息科学版), 2009, 34(2): 203-206. |
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| 作者姓名： | 周拥军 寇新建 |
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| 作者单位： | 1上海交通大学船舶海洋与建筑工程学院,上海市东川路800号200240 |
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| 摘 要： | 提出了一种基于矩和曲率保持(moment and curvature preserving,MCP)的椭圆边缘的子像素定位方法。该方法在初步确定椭圆参数后,通过计算给定区域的三阶灰度矩和局部边缘的曲率不变性确定椭圆的子像素边缘,然后利用直接最小二乘拟合法对椭圆中心精确定位。
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| 关 键 词： | 矩不变 曲率 子像素边缘 直接最小二乘拟合 |
| 收稿时间： | 2008-12-21 |
| 修稿时间： | 2008-12-21 |
Moment and Curvature Preserving Methods for Circular Targets Accurate Location |
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| ZHOU Yongjun, KOU Xinjian. Moment and Curvature Preserving Methods for Circular Targets Accurate Location[J]. Geomatics and Information Science of Wuhan University, 2009, 34(2): 203-206. |
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| Authors: | ZHOU Yong-jun KOU Xin-jian |
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| Affiliation: | 1Schoo1 of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China |
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| Abstract: | Artificial circular targets are popularly used image features in computer vision and close-range photogrammetry applications.It is vital important to determine their elliptic projections in an accurate manner.A novel technique for accurately determining an ellipse center was presented.The technique,called the moment and curvature preserving(MCP),utilizes the first three intensity moments and the intensity gradient of the image for sub-pixel edge detection,then performs direct least squares fitting(LSF) for ellipse center location. |
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| Keywords: | moment preserving curvature sub-pixel edge direct least-squares fitting |
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