公开(公告)号：US20210278894A1

公开(公告)日：2021-09-09

申请号：US16324926

申请日：2017-11-09

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Yuanqing LI ,  Shenghong HE

IPC: G06F3/01 ,  G06F3/0488 ,  G06K9/00 ,  G06K9/62 ,  G06N20/10 ,  G06N5/04

Abstract: The present invention discloses an EOG-based method and apparatus for asynchronous character input, said method comprising the following steps: displaying a virtual keyboard having a total of N keys on a display, the virtual keyboard flickering in rounds, wherein in each round, all N keys randomly flicker once; when spelling, a user blinks after the flickering of a target key, so as to acquire electro-oculogram signals of the user in real-time; capturing electro-oculogram data within a time period following the flickering of a key from the acquired electro-oculogram signals, and using said electro-oculogram data as an original feature vector of the flickering key; N original feature vectors being generated in each cycle, an electro-oculogram identification method is called to identify the N original feature vectors, and outputting a certain result from 0 to N, wherein 0 indicates that a condition for character input is not met, and 1 to N correspond to the N keys on the virtual keyboard. The present invention ensures that blinking by a user may be detected normally, while at the same time effectively eliminating misjudgments of non-blinking signals, thus increasing the accuracy rate of character input.