基于机器视觉的光斑中心高精度实时检测  

High Precision Real-time Laser Spot Center Detection Based on Computer Vision

作　　者：周敬滨[1] 范勇[1] 肖德成[1] 

机构地区：[1]西南科技大学新区,四川省绵阳市621010

出　　处：《微计算机信息》2009年第16期122-123,144,共3页Control & Automation

基　　金：基金申请人:范勇;基金颁发部门:国家自然科学基金委;项目名称:基于机器视觉的自准直技术研究(10676029)

摘　　要：激光光斑的实时采集和光斑中心精确定位是激光应用和机器视觉检测领域一个关键问题.本文采用DirectShow技术实时获取并处理光斑图像,先使用Sobel算子处理得到像素级图像边缘,再使用二阶空间矩算子进一步细化从而得到亚像素边缘数据,最后通过最小二乘法拟合从而得到光斑中心0.1像素级坐标。实验结果表明该方法处理速度能满足实时系统需求,鲁棒性好,定位精度高,在定位运动光斑的中心和激光受不同环境影响情况的偏离状况方面有较好的应用。Laser spot real-time acquisition and spot center high-precision detection are critical technique in laser application and computer vision detection area. Spot image is real-time snatched and processed with DirectShow technology, firstly, using Sobel operator to get the pixel-level image edge, then two order spatial moments operator is used to refine them to obtain the sub-pixel edge data, LMS is used to fit and produce the spot center 0. 1 pixel coordinate. The Experiment results show the processing speed of the method described in this paper can meet the needs of real-time system, which has good robustness and high location precision and also has good using in locating the motive spot center and the deviance of laser when effected by different condition.

关 键 词：机器视觉 激光光斑 亚像素 实时检测 二阶空间矩 DIRECTSHOW 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]