四角形、線、円の描画
img1=cv2.imread("building.jpg",1)
cv2.rectangle(img1, (200, 200), (500, 500), (255, 0, 0),
thickness=2, lineType=cv2.LINE_4)
cv2.line(img1, (100, 100), (600, 100), (0, 255, 0),
thickness=2, lineType=cv2.LINE_4)
cv2.circle(img1, (440,400), 100, (0,0,255), thickness=2,
lineType=cv2.LINE_4, shift=0)
cv2.imshow ( "img", img1 )
cv2.waitKey(1000)
Test7.py