在linux下利用video4linux接口采集单幅图像-grab one picture via video4linux in linux

基于何凯明的单幅图像去雾而进一步发展出来的视频去雾，计算量较大，花费时间较长-He Kaiming based single image to go out of the fog and the further development of the video to fog, large amount of calculation, it takes a long time