opencv开发人员做的关于opencv的PPT，比较简单，入门级的介绍，里面有几个简单的opencv例子比如：找出图像中轮廓，视频中的人脸检测-opencv developer opencv to do on the PPT, relatively simple, entry-level introduction, there are a few simple examples opencv example: to find contour images, video, Face Detect