一种改进的二维Hough变换提取激光光斑参数方法  

An Improved 2D Hough Transform Method for Extracting Laser Spot Parameter

作　　者：章秀华[1] 杨坤涛[1] 

机构地区：[1]华中科技大学光电子科学与工程学院,湖北武汉430074

出　　处：《激光与红外》2006年第10期995-997,共3页Laser & Infrared

摘　　要：文章提出了一种改进的二维Hough变换提取激光光斑参数的方法。根据不共线三点决定一个圆的原理,利用目标图像任一边缘点的梯度方向信息,按规则选取目标边缘上的其它两个点,将三个边缘点作为一组数据,求解圆形目标的方程。对参数空间中的二维矩阵数组投票,得到圆形目标的中心坐标。对归一化半径直方图进行滤波,求得圆形目标的半径。将该算法运用于实际探测到的激光光斑图像,在运行时间及定位目标图像的准确度上都取得了较好的结果。An improved 2-dimensional Hough transform method to extract the laser spot parameters is proposed. Based on the gradient direction information of the selected first edge pixel in the image, the two others points are selected, and the three points are used as a group to compute the circle equation. It uses a 2-dimensional accumulator array for circle center and a normalized 1-dimensional radius histogram for circle radius respectively, and validates their existence by radius histogram. The proposed method is applied into the processing of real laser spot image, it has acquired good result in calculation time and detection accuracy.

关 键 词：激光光斑 二维Hough变换 梯度方向信息 参数空间 

分 类 号：TN247[电子电信—物理电子学]