安装依赖

1）下载安装opencv-2.4.9，并将cv2.pyd拷贝到python安装目录的site-package下
2）pip install numpy
3）pip install aircv

准备一张原图和截图

原图

截图

代码

import cv2
import aircv as ac

# print circle_center_pos
def draw_circle(img, pos, circle_radius, color, line_width):
    cv2.circle(img, pos, circle_radius, color, line_width)
    cv2.imshow('objDetect', imsrc) 
    cv2.waitKey(0)
    cv2.destroyAllWindows()

if __name__ == "__main__":
    imsrc = ac.imread('bg.jpg')
    imobj = ac.imread('obj.png')

    # find the match position
    pos = ac.find_template(imsrc, imobj)

    circle_center_pos = pos['result']
    circle_radius = 50
    color = (0, 255, 0)
    line_width = 10

    # draw circle
    draw_circle(imsrc, circle_center_pos, circle_radius, color, line_width)

效果图