Human-computer interaction system based on ophthalmic electric code and interaction method thereof

Abstract

The invention discloses a man-machine interaction system and an interaction method thereof based on an ophthalmic electric code. The system comprises an ophthalmic electric signal acquisition module,an ophthalmic electric signal preprocessing module, an eye movement feature extraction module and an eye movement direction classification module, an ophthalmic electric code module and a character output display module which are connected in turn. The interactive method comprises the following steps: S1, an ophthalmic signal acquisition module is used for acquiring the electric signal of eye movement and amplifying and filtering the electric signal of eye movement; 2, remove that unconscious blinking artifact and smoothing process by an ocular signal preprocessing module, extracting the eye movement segment of the ocular signal to obtain a preprocessed ocular signal; S3, the eye movement feature extraction and eye movement direction classification module extracts the feature vector of thepre-processed eye electric signal and classifies the feature of the pre-processed eye electric signal based on the error correction coding support vector machine to obtain the eight-direction eye electric signal; S4, the oculogram encoding module assigns binary encoding to the eight-direction oculogram signal, S5, the character output display module outputs corresponding characters according to the binary encoding.

Description

technical field [0001] The invention belongs to the technical field of intersecting fields of biomedicine and informatics, and in particular relates to a human-computer interaction system and an interaction method based on oculoelectric coding. Background technique [0002] Personal computers are becoming increasingly popular in workplaces as well as in ordinary homes. Traditional computer systems use keyboard and mouse as the main input and output devices. At present, the human-computer interaction mode adopted by most computer systems is: keyboard and mouse-monitor-keyboard and mouse. Although this mode of human-computer interaction can meet the needs of most computer users, traditional input devices such as mouse and keyboard obviously cannot be used normally for groups with severe limb disabilities and motor nervous system damage. [0003] In daily life, most elderly people who cannot take care of themselves are unable to move their hands and feet conveniently, and eve...

AI Technical Summary

Problems solved by technology

The traditional human-computer interaction system based on oculoelectric control uses a virtual keyboard, which requires multiple combinations of eye movements to complete the output of a single character, and the rate of character output is not high.

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