# Creepy Face Tracking Portrait

## Overview

http://www.youtube.com/watch?v=3rhnfBSjj6w

Have you ever seen a portrait where the face or eyes appear to follow your every movement? These are popular decorations at haunted houses that are typically based on the [hollow face illusion](http://www.youtube.com/watch?v=ORoTCBrCKIQ). In this illusion your brain is tricked into perceiving a concave face (i.e. hollow or caved-in) as actually standing out like normal face.   
  
Inspired by creepy face following portraits, I decided to put a modern spin on the classic illusion by using real-time face detection. You can see from the video above and the photo below the project I created using a Raspberry Pi and camera running code based on [openFrameworks](http://www.openframeworks.cc/ "Link: http://www.openframeworks.cc/") and [OpenCV](http://opencv.org/ "Link: http://opencv.org/"). Follow this guide to learn how I built this creepy face tracking portrait!

![](https://cdn-learn.adafruit.com/assets/assets/000/011/659/medium800/raspberry_pi_DSC00316.jpg?1381799690)

- [Next Page](https://learn.adafruit.com/creepy-face-tracking-portrait/hardware.md)

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