Brain-controlled virtual human obstacle avoidance control method

Abstract

The invention discloses a brain-controlled virtual human obstacle avoidance control method which comprises an off-line training step: initializing a system, starting an interactive interface, enabling a user to watch a corresponding flashing button according to a prompt, collecting an electroencephalogram signal of the user through an electrode cap, processing the collected electroencephalogram signal, and determining a threshold value of a difference value between the first largest normalized regression score and the second largest normalized regression score, the maximum number of button flashing times and the minimum number of button flashing times as set parameters adapting to a Bayes classifier in an on-line training stage; an on-line control step: reinitializing relevant parameters, staring the interactive interface, enabling the user to self-decide to watch a flashing button, collecting an electroencephalogram signal through the electrode cap, processing the collected electroencephalogram signal, generating a control command according to an output classification result, and controlling a virtual human to move. According to the method, the virtual human can be controlled to do corresponding motion in a virtual scene to avoid an obstacle, thus enhancing the brain-controlled training effect and enabling the user to obtain a better experience.

Description

technical field [0001] The invention relates to the fields of brain-computer interface and virtual reality, in particular to a brain-controlled virtual human obstacle avoidance control method. Background technique [0002] Patients suffering from motor dysfunction cannot communicate well with the outside world. Brain-computer interface (BCI) technology allows these patients to directly control the brain-computer interface device through brain signals to achieve communication with the outside world and Operations on external objects. The essence of brain-computer interface technology is to establish an external channel between the human brain and the computer. This channel can realize external information exchange and control without the participation of nerve or muscle tissue. [0003] In the last century, people's research on brain-computer interfaces mainly revolved around controlling external devices to replace some missing functions of patients, such as controlling pros...

AI Technical Summary

Problems solved by technology

Since users are trained and tested in simulated realistic scenarios instead of mechanical brain-computer interface devices, this greatly reduces the safety risk and cost of experiments, but can achieve the same effect

[0005] At this stage, the technology combining brain-computer interface and virtual reality has made some progress, and there are a small number of brain-controlled virtual scene roaming and brain-controlled virtual games based on motor imagination or P300; obstacle avoidance system

And the virtual environment of the previous research system is relatively monotonous, and the virtual environment is simply observed by moving the camera. The controlled virtual person can only perform mechanical specific movements on a certain part of the body, which is dull and has poor interactivity.

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