Steady motion evoked potential brain-computer interface method based on equal-brightness color strengthening

Abstract

The invention discloses a steady motion evoked potential brain-computer interface method based on equal-brightness color strengthening. An equal-brightness color checker stimulation normal form is adopted, the contraction-expansion motion of checkers is achieved in a sine mode; an electroencephalogram generated when a user stares a stimulating pattern is collected through electroencephalogram collecting equipment and subjected to amplifying, filtering and A / D conversion, then the processed electroencephalogram is input into a computer, and feature extraction and classification and recognition of the collected electroencephalogram are achieved through canonical correlation analysis. According to the method, the color, brightness, the shape, motion and other visual information are integrated, the visual fatigue of the user is relieved, the signal-to-noise ratio of the EEG is increased, the identification accuracy of the stare target is higher, the method has the advantages of low flickering and high adaptability, and the interaction performance of a brain-computer interface can be improved.

Description

technical field [0001] The invention relates to the technical field of medical information intelligent processing, in particular to a steady-state motor-evoked potential brain-computer interface method based on equal-brightness color enhancement. Background technique [0002] Brain-computer interface technology (BCI) commonly used methods include motor imagery (Motor imagery, MI), P300 event-related potential, transient visual evoked potential (tVEP), steady-state visual evoked potential (SSVEP) and so on. In contrast, the steady-state visual evoked potential requires fewer electrodes, the user does not need long-term training, and the recognition accuracy is higher. However, SSVEP-based brain-computer interfaces often use stimulation methods such as light flickering or graphic flipping, which can easily cause visual fatigue and reduce brain response, which limits its further application. In recent years, some scholars have proposed a brain-computer interface paradigm based...

AI Technical Summary

Problems solved by technology

However, the pattern in the central area of ​​the Newton ring destroys the property that the Newton ring maintains a constant brightness during the movement, reduces the spectral peak signal-to-noise ratio, and is not conducive to reducing the visual fatigue of the user.

[0003] Considering the limitations of SSVEP and SSMVEP, and the perception function of equal brightness of the human eye, that is, the two colors will fuse at the point of equal brightness, and the perception of flicker by the human eye will be minimized, the present invention designs a color checkerboard with equal brightness Stimulation paradigm, there is no publication of relevant literature that combines the two technologies of motor visual evoked potential and color stimulation

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