參考

程式碼

import numpy as np
import cv2

img = np.zeros((512, 512, 3), np.uint8) # 建立一張黑色的影象

img = cv2.line(img, (0, 0), (511, 511), (255, 0, 0), 5) # 從img的(0,0)座標到(511, 511)座標以(255, 0, 0)的顏色畫5px的直線
img = cv2.rectangle(img, (384, 0), (510, 128), (0, 255, 0), 3) # 畫矩形
img = cv2.circle(img, (447, 63), 63
 
, (0, 0, 255), -1) # 畫圓，(447,63)圓心，63半徑，(0,0,255)顏色，-1填充
img = cv2.ellipse(img, (256, 256), (100, 50), 0, 0, 360, (0, 255, 255), -1) #畫橢圓

# 畫多邊形
pts = np.array([[10, 5], [20, 30], [70, 20], [50, 10]], np.int32)
pts = pts.reshape((-1, 1, 2))
img = cv2.polylines(img, [pts], True, (0, 150, 255))

# 畫文字
font = cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(img, 'Hello OpenCV'
 
, (30, 400), font, 1, (255, 255, 255), 2, cv2.LINE_AA)

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

效果圖