OpenCV is a software toolkit for processing real-time image and video, as well as providing analytics, and machine learning capabilities.Development BenefitsUsing OpenCV, a BSD licensed library ...

This course offers Python developers a detailed introduction to OpenCV 3, starting with installing and configuring your Mac, Windows, or Linux development environment along with Python 3.

The Python code is actually quite straightforward. Essentially, the software tracks your hand and by estimating its relative size to determine how far away it is.