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import numpy as np
import cv2
def draw_polygon (image, points, color, thickness = 1):
points_len = len(points)
for i in range (0, points_len):
p0 = tuple( points[i] )
p1 = tuple( points[ (i+1) % points_len] )
cv2.line (image, p0, p1, color, thickness=thickness)
def draw_rect(image, rect, color, thickness=1):
l,t,r,b = rect
draw_polygon (image, [ (l,t), (r,t), (r,b), (l,b ) ], color, thickness)
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