Title :
A virtual character recognition system based on optical detection of red light and its embedded implementation
Author :
Ding, Kai ; Jin, Lianwen ; Yan, Hanyu
Author_Institution :
Coll. of Electron. Inf., South China Univ. of Technol., Guangzhou
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
This paper proposes a novel ldquoair-writingrdquo character recognition system (ACRS) based on optical detection of red light, with which a user can write a character in the air with a red light-emitting device. The trajectories of the light can be captured and detected by a camera during the writing process and then a character reconstruction algorithm is employed to convert them to a 2-D plan (as a virtual character trajectory) after a serials of preprocessing steps, including background analyzing and noise erasing. Finally, the virtual character trajectory is considered as a kind of inkless character pattern and recognized by a minimum classifier. To expand the application of our system, we implement an ARM7-based embedded ldquoair-writingrdquo character recognition system (E-ACRS). Experiments show that both ACRS and E-ACRS are able to recognize cursive digits and English alphabetical characters with encouraging accuracy.
Keywords :
character recognition; object detection; virtual reality; 2D plan; air-writing character recognition system; optical detection; red light; virtual character recognition system; virtual character trajectory; Algorithm design and analysis; Background noise; Cameras; Character recognition; Optical character recognition software; Optical detectors; Optical devices; Reconstruction algorithms; Trajectory; Writing;
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
DOI :
10.1109/APCCAS.2008.4746176