Install OpenCV on Ubuntu 18.04 Bionic Beaver Linux -


To install OpenCV on Ubuntu 18.04 with python 2 bindings open up terminal and enter:

This is a companion discussion topic for the original entry at


Trường Hoàng

I;m a newbie. Please help me. I got a error like that:

raceback (most recent call last):
File “”, line 6, in
b,g,r = cv2.split(img) # get b,g,r
ValueError: not enough values to unpack (expected 3, got 0)


mikethescott -> Trường Hoàng

The image filename in needs to be changed to a file that exists. I got the same error.


Brendon McCool

Looks like the includes aren’t right for the C++ example. There are just three blank includes.

I used #include <opencv2 opencv.hpp=""> and it worked.


Lubos Rendek Mod -> Brendon McCool

Fixed…!! thank you…


Ajay Kumar G

Thanks for the nice tutorial, Its working well.


Thanks for the nice tutorial.