帧差-> I-mean(I) -->openFilter -->medianFilter + Sobel --> psnr(sobel, black)帧差-> I-mean(I) -->openFilter -->medianFilter + Sob
帧差-> I-mean(I) -->openFilter -->medianFilter + Sobel --> psnr(sobel, black)帧差-> I-mean(I) -->openFilter -->medianFilter + Sob