I'm very happy to announce a new Arduino shield called the Video Experimenter:
Some things you can do with the Video Experimenter: + Overlay text and graphics onto a video signal from a camera, DVR, DVD player, VCR or any other source of composite video. + Capture low-res video image frames for display or video processing. Give your Arduino the gift of sight! + Perform computer vision projects with object tracking, edge detection, etc. + Decode closed captioning or XDS (extended data services) data embedded in television broadcasts. + Works with NTSC (North America) or PAL (rest of the world) television standards.
All this for a much lower price than you might expect. The capabilities are documented in detail with source code, etc. There's a video on the product page that shows an overview of the capabilities, too. Check out the product details and video here: http://nootropicdesign.com/ve/