README.md

How to Detect Contours in Images using OpenCV in Python

To run this:

pip3 install -r requirements.txt
To detect contour of the the image thumbs_up_down.jpg using 225 value of binary threshold conversion:
```
python contour-detector.py thumbs_up_down.jpg 225
```
For live detection, consider using live-contour-detector.py script.