说明：  模板匹配，可将目标图片中与模板图片相似的部分寻找出来。 具体原理是求目标图片的每个大小与模板图片相等的部分与模板图片的像素信息的关联度。达到用户规定阈值即可认定为识别成功，并且将最匹配的部分用矩形标记。
(Template matching can find out the similar parts of the target image. The specific principle is to calculate the correlation degree between the pixel information of the template image and each part of the target image whose size is equal to that of the template image. When the threshold is reached, the recognition is considered successful, and the most matching part is marked with a rectangle.)