Title：A touch detection system and method based on adaptive hierarchical structured light
Country：China
Patent No.：201310314534.7
Legal Status：Authorized
Inventor：Xiang Xie, Lifei Ren, Ang Li, Yanjun Han, Guolin Li, Jun Hu, Zhong Lv, Wei Song, Yi Zheng, Zhihua Wang
Assignee：Tsinghua University
Address：Mailbox No. 82, Beijing 100084
Filing Date：2013-07-24
Issue Date：2016-04-20
Abstract：
The invention provides an adaptive hierarchical structure light-based touch detection system and method. The system comprises a touch detection unit, a projection unit, an image sensing unit and a control unit, wherein the touch detection unit is used for receiving original interface image data from the exterior of the system, receiving a projection region image data photographed by the image sensing unit and processing the image data, and acquiring and outputting touch information of a touched object; the projection unit is used for projecting an original interface image to a projection plane to image; the image sensing unit is used for acquiring and outputting the projection region image data; and the control unit is used for controlling ordered cooperative work between every two units and controlling the synchronization between the projection unit and the image sensing unit. By using a structure light three-dimensional measurement principle, the distance between the touched object and the projection plane can be accurately measured, and the measurement precision and the touch detection accuracy are guaranteed; the amount of calculation of structure light generation and extraction is reduced; and the problem of flickering of hidden embedded structure light or image quality reduction is effectively solved.
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