Chess Grabber was written by Dion Nicolaas as a hobby project. I started the project when I found out about Chris Greening's Sudoku Grab, an iPhone application that recognizes and solves a Sudoku puzzle it sees through its camera. His description of how it works got me thinking that Chess Grabber could be done, too. It turns out I use a lot of different techniques for Chess Grabber, but I started from there.
When I started the project I knew virtually nothing about image recognition, so there was a lot to learn. Here are some pages that I read.
Thresholding (image processing) - Wikipedia, the free encyclopedia
Robust Recognition of Checkerboard Pattern for Deformable Surface Matching in Multiple Views
Automatic Detection of Checkerboards on Blurred and Distorted Images by Martin Rufli e.a.
Four Free Neural Network Libraries for Python by Greg Pinero
Divmod Reverend - a simple Bayesian classifier
Improving nearest neighbor rule with a simple adaptive distance measure by Jigang Wang, Predrag Neskovic, Leon N. Cooper
Python Imaging Library (PIL)
Bottle: Python Web Framework
CSS layouts by Russ Weakly
Web micro-framework Battle! by Richard Jones