We need CMake to configure the installation, GCC for compilation, Python-devel and Numpy for building Python bindings etc. You can skip optional dependencies if you don't want. Building OpenCV from sourceĬompiling from source may seem a little complicated at first, but once you succeeded in it, there is nothing complicated.įirst we will install some dependencies. Also at some point in time, if you want to contribute to OpenCV, you will need this. In the older Ubuntu versions, Python 2 is the default and typing python in the terminal will bring you to Python 2, which means we have to type python3 to use. So for getting latest source codes preference is next method, i.e. With respect to Python API, latest version will always contain much better support and latest bug fixes. To install Python 2 version on Ubuntu 20.04 open a terminal and enter the following commands: sudo apt update sudo apt install python2 Check your current Python version: python2 -V Python 2.7.17 Follow our tutorial on how to switch to Python 2 from Python 3 as a default version on Ubuntu 20.04.

For example, at the time of writing this tutorial, apt repository contains 2.4.8 while latest OpenCV version is 3.x. Apt repositories may not contain the latest version of OpenCV always. If the results are printed out without any errors, congratulations !!! You have installed OpenCV-Python successfully.

Install python 2.7 ubuntu