import numpy as np
import cv2

cap = cv2.VideoCapture(0)

# Define the codec and create VideoWriter object
#ourcc = cv2.cv.CV_FOURCC(*'XVID')  # cv2.VideoWriter_fourcc() does not exist
#ut = cv2.VideoWriter('output.avi',fourcc, 20.0, (640,480))
kernel = np.ones((3,3),np.uint8)

while(cap.isOpened()):
    ret, frame = cap.read()
    if ret==True:
#        img = cv2.flip(frame,1)
        # write the flipped frame
#       out.write(frame)
#	dst = cv2.filter2D(frame,-1,kernel)
	img = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
	# Output dtype = cv2.CV_8U
	sobelx8u = cv2.Sobel(img,cv2.CV_8U,1,0,ksize=5)

	# Output dtype = cv2.CV_64F. Then take its absolute and convert to cv2.CV_8U
	sobelx64f = cv2.Sobel(img,cv2.CV_64F,1,0,ksize=5)
	abs_sobel64f = np.absolute(sobelx64f)
	sobel_8u = np.uint8(abs_sobel64f)

        cv2.imshow('frame',frame)
        cv2.imshow('sobel x8u',sobelx8u)
        cv2.imshow('Sobel 8u',sobel_8u)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    else:
        break

# Release everything if job is finished
cap.release()
cv2.destroyAllWindows()