Patent ID: 9684415
Date: 2017-06-20
CPC Classifications: G06F

Claim:
1. An optical touch-control system, comprising: a display unit; a light source; a retro-reflective touch-control device comprising a retro-reflector covered by a rib structure; at least two image capturing units, configured to capture a plurality of images in front of the display unit, which are generated by the retro-reflective touch-control device reflecting the light emitted from the light source, wherein each image capturing unit is an infrared camera; and a processor, wherein the processor determines whether at least one first cluster is in the images from the image capturing units based on a first threshold, wherein the processor further calculates a touch position of the retro-reflective touch-control device on the display unit based on the at least one first cluster, wherein the processor further determines whether at least one second cluster is in the images from the image capturing units based on a second threshold, wherein when the processor determines that only the first cluster is associated with the first threshold in the images, the processor calculates a barycenter of the first cluster, and wherein when the processor determines that both there is at least one first cluster associated with the first threshold and at least one second cluster associated with the second threshold, the processor further determines whether the number of the at least one second cluster is more than one, if so, the processor integrates the at least one second cluster into an integrated cluster, ignoring the at least one first cluster, and calculates the barycenter of the integrated cluster; if not, the processor calculates the barycenter of the second cluster ignoring the at least one first cluster.