Since the time I’ve wrote my first article about motion detection, I’ve got a lot of e-mails from different people around the world, who found the article quite useful and found a lot of applications of the code in many different areas. Those areas i

图片的拖拉和放大缩小，运用的是手势识别检测两点之间的距离-Image drag and zoom using gesture recognition and detection distance between two points