vsual c++ code to find homography matrix between two image using matched image points

blob detection tutorial from wikipedia

机器视觉常见方法——Halcon描述,图像获取 (前提）,模板匹配（定位，比较）,Blob分析（基础之一）,测量(结果),其它应用 . -Machine vision common methods- Halcon descr iption, image acquisition (prerequisite), template matching (positioning, comparison), Blob analysis (based on one), measurement (resul