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.
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.
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.
Citation: 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.

基于矩和曲率保持的圆形标志精确量测

Moment and Curvature Preserving Methods for Circular Targets Accurate Location

  • 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。

     

    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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