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Find Centroid Coordinate of whole frame in OpenCV

Hello everyone, I'm searching on the internet for an optimum code to find the Centroid's XY-Coordinates of OpenCV Frame, but failed to do so.

I know how to find the centroid/center of a contour, as below(in python):

image = cv2.imread("test.png"])
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

blurred = cv2.GaussianBlur(gray, (5, 5), 0)
thresh = cv2.threshold(blurred, 60, 255, cv2.THRESH_BINARY)[1]


# find contours in the thresholded image
cnts = cv2.findContours(thresh.copy(), cv2.RETR_EXTERNAL,
    cv2.CHAIN_APPROX_SIMPLE)
cnts = cnts[0] 
#print cnts

# loop over the contours
for c in cnts:
    # compute the center of the contour
    M = cv2.moments(c)
    cX = int(M["m10"] / M["m00"])
    cY = int(M["m01"] / M["m00"])

Where CX, CY is the required XY-coordinates but how to find that for whole video-frame/image in OpenCV, Please anyone can help me for the same?