python opencv code example

Example 1: install opencv python

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

Example 2: python opencv

pip install opencv-python

Example 3: cvtcoloer opencv

toGray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

Example 4: 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