激光跟踪仪靶球识别图像处理方法研究

The Image Processing Method of Laser Tracker Target Recognition

激光跟踪仪是大型装备制造过程中的大尺寸精密测量仪器,在跟踪测量过程中,容易丢失目标,影响工作效率,无法继续跟踪。图像处理法对靶球进行目标识别,以实现靶球的断光续接。本文采用模板匹配和Hough变换两种方法,首先将图像处理技术应用于模板匹配,先对拍摄到的靶球进行不同的边缘提取法处理,然后再利用模板匹配法,提取目标靶球的中心坐标;其次利用Hough变换法求取并标定靶球中心坐标。通过对比不同方法提取到的目标的中心坐标,得到较为准确的提取方法,实现在脱靶后激光跟踪仪准确的跟踪目标。

Laser tracker is a large size precision measuring instruments for large scale equipment manufacturing process.In the process of tracking measurement,it is easy to lose the target,and affects the efficiency of the work,making it unable to continue tracking. In this paper,image processing method for target recognition of target ball is used in order to achieve the target ball when it is break off liaght. We use two methods which are the template matching and Hough transform. First of all,the image processing technique is applied to template matching. Firstly,we use different edge extraction methods to deal with target ball by shot,and then use the template matching method to get the center coordinates of the target ball;Next we will use Hough transform method to get and demarcate the center coordinates of the target ball. By comparing the different methods which are used to get the center coordinates of the target ball,we will get the most accurate extraction method,and get the accurate tracing of laser tracker on target to achieve the goal after miss.