python - 错误:..\..\..\opencv-2.4.8\modules\highgui\src\window.cpp:269:错误:(-215)size.width> 0 && size.height> 0在函数cv中: :imshow

Question

当我运行从此链接http://docs.opencv.org/trunk/doc/py_tutorials/py_video/py_lucas_kanade/py_lucas_kanade.html获取的代码时，他们给出以下代码，并给出以下错误

Traceback (most recent call last):
File "C:\Python27\code\afan.py", line 48, in <module>
 cv2.imshow('frame',img)
error: ..\..\..\opencv-2.4.8\modules\highgui\src\window.cpp:269: error: (-215) size.width>0 && size.height>0 in function cv::imshow:        

Answer 1

写

cv2.line(mask, (a,b),(c,d), color[i].tolist(), 2)
cv2.circle(frame,(a,b),5,color[i].tolist(),-1)

代替

mask = cv2.line(mask, (a,b),(c,d), color[i].tolist(), 2)
frame = cv2.circle(frame,(a,b),5,color[i].tolist(),-1)