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install opencv python

pip install opencv-python
pip install opencv-contrib-python

conda install opencv

pip install opencv-python #Try this if the conda install method doesn't work

python install opencv

#Basic package
pip install opencv-python
#Full package
pip install opencv-contrib-python

install opencv

sudo pip3 install opencv-contrib-python

How to install opencv

pip install opencv-python

python install opencv

# install any one of them to avoid conflicts
# I prefer 2nd one
pip install opencv-python
pip install opencv-contrib-python

# for linux, you may have two python version on your pc
# so - 
pip3 install opencv-contrib-python

install opencv for python 2.7

pip2 install opencv-python==4.2.0.32

install opencv

sudo apt-get install libopencv-dev   # ubuntu c++

download required packages from below link:
https://docs.opencv.org/4.0.1/d7/d9f/tutorial_linux_install.html

NOTE: you can download required packages by "sudo apt-get install <packages>" or 
download source code by git using above link

tags: ubuntu, c++, opencv 4 version

opencv python install windows

conda create --name virtualenv python=3.8