在PC上实现移动侦测，python+opcv3.0 当有人出现时，进行跟踪，拍照，可以在树莓派上实现嵌入式移动侦测-Implement motion detection on a PC, python+opcv3.0 when someone appears, tracking, camera, embedded motion detection can come in raspberry

可以隐藏水印图片，实现了水印的嵌入和提取(Watermark images can be hidden, and the watermark can be embedded and extracted)