Python+ OpenCV小白，碰到了最简单的加载图片问题该怎么办啊？

求大佬们救命啊！！

/Users/litianzuo/PycharmProjects/Opencv/venv/bin/python /Users/litianzuo/PycharmProjects/Opencv/Chapter1.py
package import
Traceback (most recent call last):
File "/Users/litianzuo/PycharmProjects/Opencv/Chapter1.py", line 7, in
cv2.imshow("Output",img)
cv2.error: OpenCV(4.2.0) /Users/travis/build/skvark/opencv-python/opencv/modules/highgui/src/window.cpp:376: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'imshow'

Process finished with exit code 1

这是错误代码

你的图片的读入有问题，你看看你的图片都在在不在，路径或格式写的有没有问题。
cv2.imread 遇到错误的路径是不报错的，所以你要自己核对一下