import numpy as np
import cv2
import math
 
print("version openCV:"+str(  cv2.__version__ ))
  
def trace_carre(u,v,sz):
    global res
    cv2.rectangle(res,(u-sz//2,v-sz//2),(u+sz//2,v+sz//2),(0,255,0),1)


img = cv2.imread('messi5.jpg')
res = cv2.resize(img,None,fx=2, fy=2, interpolation = cv2.INTER_CUBIC)

# Draw a diagonal blue line with thickness of 5 px
cv2.line(res,(0,0),(511,511),(255,0,0),5)
cv2.rectangle(res,(384,0),(510,128),(0,255,0),3)

for i in range (10,300,10):
   print(str(i))
   trace_carre(200,100,i)

#sauver au format png pour compression sans perte
cv2.imwrite('messi5out.png',res)

print("fini")