A small python program that identifies your hand gesture using contours and convex hull. But with a small tweak i.e added a keyboard function using pyautogui library. So, the user can change if wants from arrow-up, down, right, left to any desired function.
For Python3
pip3 install python3-xlib
sudo apt-get install scrot
sudo apt-get install python3-tk
sudo apt-get install python3-dev
pip3 install pyautogui