cvREctangle usage example
Example: python opencv draw rectangle
image = cv2.imread(path)
start_point = (5, 5)
end_point = (220, 220)
# Blue color in BGR
color = (255, 0, 0)
# Line thickness of 2 px
thickness = 2
# Using cv2.rectangle() method
# Draw a rectangle with blue line borders of thickness of 2 px
image = cv2.rectangle(image, start_point, end_point, color, thickness)