A Brain-Computer Interface Method Based on High Refresh Rate Presentation for Motor Visual Evoked Potentials
A technology of visual evoked potential and brain-computer interface, which is applied in mechanical mode conversion, computer components, electrical digital data processing, etc., and can solve problems such as the decrease of the user's brain response signal, the complexity of the induced signal, and the limitation of the practical application of the brain-computer interface. , to achieve the effects of reducing computer system resource consumption, reducing the number of stimulating motion patterns, and good human-computer interaction performance
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[0053] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0054] A motor visual evoked potential brain-computer interface method based on high refresh rate presentation, comprising the following steps:
[0055] 1) Chessboard stimulus pattern drawing: In order to ensure that the average brightness remains strictly constant during the stimulation process, the present invention adopts a radial contraction-expansion annular checkerboard as the basic pattern of stimulation, refer to figure 1 , each ring in the circular chessboard is divided into black and white grids with the same number and size, so the areas of bright and dark areas in each ring are always equal; in addition, the brightness value of the central part of the stimulus unit is always set to is the background brightness, and the area remains constant, only a black point with a radius of 2 pixels is set at the center of the circle; the ring-shaped checkerboard stimu...
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