I have an image, taken from a live webcam, and I want to be able to detect a specific object in the image and extract that portion of it to do some further processing.
Specifically, the image would be of a game board, let's say for the purposes of this question that it's a Sudoku game board.
My initial approach was to look for contrasting areas and work it out from there, but I seem to end up with a lot of potential edges (many erroneous) and no real clue as to how to work out which ones are the ones I actually want!
Are there any algorithms, libraries, code samples, or even just bright ideas out there, as to how I would go about finding and extracting the relevant part of the image?
use the free AForge.Net image processing library for this. there's a ton of cool stuff to play with.