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1. (WO2018196370) PATTERN RECOGNITION-BASED VISUAL PROJECTION INTERACTION SYSTEM AND INTERACTION METHOD

Pub. No.:    WO/2018/196370    International Application No.:    PCT/CN2017/113361
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Nov 29 00:59:59 CET 2017
IPC: G06K 9/20
Applicants: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
华南理工大学
Inventors: XIE, Wei
谢巍
HE, Lingzhen
何伶珍
ZHANG, Langwen
张浪文
LI, Bo
李博
Title: PATTERN RECOGNITION-BASED VISUAL PROJECTION INTERACTION SYSTEM AND INTERACTION METHOD
Abstract:
A pattern recognition-based visual projection interaction system and interaction method. The system comprises a projector 1, a camera 2, an infrared emitter 3 and a PC. First, the system forms a plane covered by a near infrared light source in a projection area; when a user moves in the area, light spots are diffusely reflected to the legs of the user; also, an infrared filter is added to a lens of the camera 2 to reduce the background complexity and highlights the target light spots. Next, by calculating morphologic parameters such as area, area to perimeter ratio, and circularity of infrared light spots on human legs and performing filtering, a primary coarse-grained classifier is formed. Then, a minimum error rate Bayesian Discriminant in a pattern recognition method is used as a secondary fine-grained classifier. Finally, coordinates of a target on an image are mapped to coordinates of a cursor of the PC, thereby enabling control over the cursor.