img=cv2.imread("test2.jpg") # 导入我们需要添加水印的图片
RGB_img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
blank_img = np.zeros(shape=(RGB_img.shape[0],RGB_img.shape[1],3), dtype=np.uint8)
font = cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(blank_img,text='Learn Python',org=(40, 90),
fontFace=font,fontScale= 2,
color=(255,0,0),thickness=10,lineType=cv2.LINE_4)