【摘要】 针对变形测量系统中激光光斑中心精确定位的要求,在重心法的基础上,提出了基于重心法的曲线拟合亚像素定位算法。该算法首先用变结构元多尺度广义形态滤波算法滤除图像噪声,然后用重心法计算出激光光斑的亚像素位置,最后用曲线拟合对激光光斑的中心位置进行精确定位。根据变形测量原理,搭建了实验平台,通过多次实验,变形角的标准差均小于20″。实验结果表明,该算法能有效地提高变形测量系统的测量精度。更多还原

【Abstract】 The barycentric sub-pixel location algorithm of curve fitting is proposed to meet the requirements of pre-cise laser spot center positioning in distortion measurement system.First,the multi-scale generalized morphological fil-tering algorithm of variable structure element is used to filter image noise.Then,the sub-pixel position of laser spot is calculated in barycenter algorithm.Finally,curve fitting is used to locate the laser spot center precisely.The experimental platform is set up according to the distortion measurement principle.With many experiments,standard deviation of distor-tion angle is less than 20".The experiment results show that the location algorithm can improve distortion measurement accuracy effectively.更多还原