The invention pertains to a method of and apparatus for interactively tracking, analyzing and teaching a correct golf swing. A computer with an attached video camera and display monitor is used to superimpose patterns on the monitor over the golfer's live background image that represent the ideal golf...http://www.google.com.hk/patents/US6533675?utm_source=gb-gplus-share專利 US6533675 - Interactive method and apparatus for tracking and analyzing a golf swing
