Patent ID: 7352360
Filing Date: 2008-04-01
Classification: A63F,G06F

Abstract:
1. A multi-trail spot click-event detection method, which applies a spot to perform click event operation on a display screen and uses a camera, connected to a host, to capture multiple images from the display screen at consecutive time points, comprising the steps: a possible spot finding step, which subtracts every two consecutive images captured by the camera to thus obtain difference images, and selects pixels of each difference image with brightness in a first determined range to thus form blobs; a possible spot determining step, which finds a first blob from the blobs of each difference image that has an area in a second predetermined range, and regards spots of the first blob found as possible spots; a multi-trail handling step, which sets start data for at least one trail array and subsequently classifies the first blob in each difference image into the at least one trail array; and a spot click-event detecting step, which determines if there is a spot in a consecutive blob of the at least one trail array in accordance with the consecutive blob of the at least one trail array existing at a next time point or not, and thus decides that a spot click-event occurs when the spot is absent at the next time point immediately after the spot is presented.