OpenCV基本编程练习，包括显示图片，播放视频，滚动条，图片平滑，ROI，事件响应等。为了避免各个模块之间相互影响，对应的代码已经屏蔽，可以通过选择取消屏蔽相应的代码实现相应的功能-OpenCV basic programming exercises, including display pictures, play video, scroll bars, smooth picture, ROI, and incident response. In order to avoid the int