A.cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)B.cv2.cvtColor(img,cv2.COLOR_BGR2HSV)C.cv2.cvtColor(img,cv2.COLOR_GRAY2BGR)D.cv2.cvtColor(img,cv2.COLOR_HSV2BGR)
A.cap =cv2.VideoCapture(’video.mp4’)B.ret,frame =cap.read()C.cv2.VideoWriter(’output.avi’,cv2.VideoWriter_fourcc(*’XVID’),20.0,(640,480))D.cv2.imread(’video.mp4’)
A.cv2.Canny(img,50,150)B.cv2.Sobel(img,cv2.CV_64F,1,0,ksize=3)C.cv2.Laplacian(img,cv2.CV_64F)D.cv2.cornerHarris(img,2,3,0.04)