An intraoral camera connects to a shade analyzer subsystem, e.g., a digital video processor, and a color display monitor. The camera captures a digital color image of the patient's tooth and the subsystem compares that image to a stored plurality of tooth shades. Each tooth shade is represented in a...http://www.google.de/patents/US5961324?utm_source=gb-gplus-sharePatent US5961324 - Tooth shade analyzer system and methods
