Unable to import cv2 using Anaconda 4.5 Python 3.6.6

Question

I am currently new to python. I have installing python 3.6 using Anaconda version 4.5. After installing few packages below I am unable to import cv2:

pip install numpy scipy matplotlib scikit-learn jupyter
pip install opencv-contrib-python

I have tried installing various version of cv2 but none works.

Answer 1

First of all, when only conda and python are installed, activate the conda environment then use following command to install

conda install -c anaconda opencv 

OR

conda install -c conda-forge opencv

if you have R and Rstudio or multiple environments, there are chances of conflict of different versions of python.

Then you first have to activate the conda environment and run the following command:

pip install opencv-python

that will take few minutes to install the opencv library.

Answer 2

First, try again using the conda command:

conda install -c conda-forge opencv

A common mistake I personally did that caused this kind of problem is when you install the package in an environment but run jupyter from another one (like from the base environment).

I would suggest you:

1- use conda list in your environment to check the packages are correctly installed.

2- make sure the environment where you installed the packages is activate before running the command: jupyter notebook