Cv2.addWeighted
이미지 블랜딩 할 때 사용한다.
Example
import cv2
image = cv2.imread('test.jpg')
overlay = image.copy()
x, y, w, h = 10, 10, 10, 10 # Rectangle parameters
cv2.rectangle(overlay, (x, y), (x+w, y+h), (0, 200, 0), -1) # A filled rectangle
alpha = 0.4 # Transparency factor.
# Following line overlays transparent rectangle over the image
image_new = cv2.addWeighted(overlay, alpha, image, 1 - alpha, 0)