加载图片,点击左键选中图片上的点并绘出横轴纵轴垂线,确定后点击右键打印出当前坐标:
#!/usr/bin/python
# coding:utf-8
from matplotlib import pyplot as plt
import cv2
def on_press(event):
if event.button==1:
ax.scatter(event.xdata, event.ydata)
plt.plot([event.xdata, event.xdata], [event.ydata, 600])
plt.plot([event.xdata, 0], [event.ydata, event.ydata])
fig.canvas.draw()
elif event.button==3:
print("x,y=",event.xdata, event.ydata)
if __name__ == "__main__":
img = cv2.imread('01.png')
cv2.imshow("src", img)
fig = plt.figure()
fig.canvas.mpl_connect("button_press_event", on_press)
ax = fig.add_subplot(111)
ax.imshow(img)
plt.axis("off")
plt.show()
输出:
原图01.png:
点击左键选点,并绘出横轴纵轴垂线:
点击右键输出当前点的坐标:
(‘x,y=’, 501.27130681818176, 201.48636363636365)