实现摄像头捕捉功能，并转化成灰度图，以及提取摄像头中轮廓-Realize the camera capture, and transformed into grayscale, and extract the contour camera

保存录像，匹配图像，输入都是灰度图，返回最可能的区域坐标，视频定位-Save video, image, input is grayscale, returns the most likely area coordinates, video positioning

用opencv对摄像头的图像进行处理，获得灰度图- U7528opencv u5BF9 u6444 u504F u5934 u7684 u56FE u50FF u8FDB u884C u5904 u7406 uFF0C u83B7 u5F97 u7070 u5EA6 u56FE