中文摘要：

点模式匹配是视觉测量中的一种新方法；针对贴片机生产中BGA芯片的图像识别对中问题，系统地介绍了BGA的视觉检测任务，提出了基于点模式匹配的快速定位算法；该算法针对BGA焊球分布特点，对传统点模式匹配算法进行优化，大大减少了运算量；现场实际运行结果表明该算法的速度和精度都能满足实际生产的需要，并具有较强的鲁棒性。

英文摘要：

Point pattern matching is a new method in vision detection. Aiming at the image recognition and locating problems of BGA package in production of Surface Mounting Machine, tasks of BGA vision detection are introduced, and a fast locating algorithm based on point pattern matching is brought forward. In view of the distributing characteristics of BGA ball grid, the algorithm optimizes the conventional point pattern matching algorithm and reduces the time- cost operation greatly. The result of actual runnings demonstrates that the speed and accuracy of the algorithm are good enough to meet the practical application, and the algorithm also has strong robustness.