OpenCV画图(画OpenCV的标志)

import numpy as np
import cv2

img = np.ones((512, 512, 3), np.uint8)*255

# 画椭圆
# 图片 (圆心) (短轴长，长轴长),旋转角度，旋转角度，开口大小角度,(颜色),(线条粗细,-1为实心)
cv2.ellipse(img, (255, 100), (65, 65), 125, 0, 290, (0, 0, 255), -1)
cv2.circle(img, (255, 100), 30, (255, 255, 255), -1)

cv2.ellipse(img, (180, 220), (65, 65), 16, 0, 290, (0, 255,0 ), -1)
cv2.circle(img, (180, 220), 30, (255, 255, 255), -1)

cv2.ellipse(img, (330, 220), (65, 65), 300, 0, 290, (255, 0,0 ), -1)
cv2.circle(img, (330, 220), 30, (255, 255, 255), -1)

font = cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(img, "OpenCV", (100, 400), font, 3, (0, 0, 0), 15, cv2.LINE_AA)

cv2.imshow('study', img)
cv2.waitKey(0)
cv2.destroyAllWindows()