Patent ID: 8427453

Claim:
An optical sensing system, comprising: a sensing area having a plurality of sides, wherein a plurality of pointing objects execute touch operation within the sensing area; a reflective mirror generating a mirror image of the sensing area; a first image-sensing device capturing a first group of real images having all or part of the pointing objects, and a first group of virtual images having all or part of the pointing objects in the reflective mirror; a second image-sensing device capturing a second group of real images having all or part of the pointing objects, and a second group of virtual images having all or part of the pointing objects in the reflective mirror; and a processing circuit generating a group of real-image candidate coordinates corresponding to the plurality of pointing objects according to the first group of real images and the second group of real images, and generating a group of virtual-image candidate coordinates corresponding to the plurality of pointing objects according to the first group of virtual images and the second group of virtual images, the processing circuit generating a group of output coordinates corresponding to the plurality of pointing objects according to the group of real-image candidate coordinates and the group of virtual-image candidate coordinates.