@DCM - good point about the dirt of the cars. That would certainly limit car recognition to a greater or lesser degree.
@formerly pizzaman - the motion sensor is just a decent webcam. Im using a Microsoft LifeCam HD which is a pretty good piece of hardware for the money, but its till under £50. The software is the real key to it. And as Im writing that, the cost will be £1,000,000,000,000
@Mad-Wolfie - amen to that, Ive been looking around for a couple of weeks now for that schematic but to no avail. Saw a few peoples attempts but all seem flaky.
@lochness - thats a really interesting link. Thanks so much. seems like someone else has beaten me to it!
