激光光斑中心位置的亚像素定位技术研究  

Center-determination of laser spot based on sub-pixel positioning technology

作　　者：李强[1] 

机构地区：[1]连云港师范高等专科学校物理系,江苏连云港222006

出　　处：《量子电子学报》2012年第1期58-62,共5页Chinese Journal of Quantum Electronics

摘　　要：激光光斑中心位置的确定是墩顶位移测量系统中进行位移量计算的关键与核心,能否准确定位光斑中心直接关系到计算的准确程度。利用Matlab对由墩顶位移测量系统采集到的激光光斑图像采用噪声消除和中值滤波进行图像平滑处理,提高目标与背景的区分度,为提取目标创造条件。其次1利用Canny算子对图像进行分割,以便从复杂背景中提取目标图像。最后,根据所提取的目标利用亚像素细分算法中的灰度重心算法求出激光光斑的中心坐标,为实现墩顶位移的精密测量提供了关键数据。Center-determination of laser spot is key to crown placement measurement system because it immediately concerns accuracy of the displacement. By using Matlab software, the grabbed laser spot image was smoothed with noise cancellation and median filtering to improve separating capacity of the targets and background, which set the terms for the object extraction. Then the image was segmented with Canny operator to extract target image from cluttered background. Finally, based on the extracted target center coordinates of the laser spot can be found by using gray barycenter algorithm.

关 键 词：激光技术 光斑中心 图像平滑 目标提取 灰度重心 

分 类 号：TN249[电子电信—物理电子学]