EEG Gaze-Region Interaction for Rapid Multi-Command Control
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Solution Overview
Problem
Existing BCI technologies require users to gaze directly at multiple visual stimuli to execute operational commands, leading to visual fatigue and increased processor burden, especially when multiple commands need to be executed quickly with high accuracy.
Innovation Solution
A human-computer interaction method that allows users to deliver operational commands by gazing at regions around a visual stimulus region, using electroencephalography signals to evoke different commands, reducing the need for direct gaze and minimizing visual stimuli, and employing various stimulation patterns to enhance signal-to-noise ratios and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users gaze directly at multiple visual stimuli to execute operational commands, then command execution accuracy is improved, but visual fatigue increases and processor burden increases
Solution Approach 1:
The patent segments the visual field into multiple regions around a central visual stimulus, where each region corresponds to a different operational command. Instead of requiring users to gaze at multiple separate visual stimuli, the system divides the area around a single stimulus into directional regions (e.g., upper, lower, left, right, and diagonal directions), allowing users to select different commands by gazing at different segments of the visual space.
Solution Approach 2:
The patent makes a single visual stimulus serve multiple functions by associating it with multiple operational commands through directional gaze regions. The same visual stimulus can trigger different commands (e.g., move forward, move backward, rotate left, rotate right) depending on which region the user gazes at, eliminating the need for multiple separate visual stimuli and reducing visual fatigue.
2Adaptability or versatility
If multiple visual stimuli are displayed to support multiple commands, then command versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements a single visual stimulus that can represent multiple operational commands by dividing the surrounding visual space into different directional regions. Each region corresponds to a specific command, allowing one stimulus to serve multiple functions. This approach maintains command versatility while significantly reducing interface complexity compared to displaying multiple separate visual stimuli.
Solution Approach 2:
The patent adds a directional dimension to the interaction model. Instead of using multiple stimuli positioned at different locations, the system uses a single stimulus with directional regions radiating outward. The directional component (angular position around the stimulus) becomes the new dimension for command selection, allowing multiple commands to be associated with one stimulus without increasing spatial complexity.
3Adaptability or versatility
If users gaze at multiple visual stimuli to execute multiple commands, then command coverage is improved, but loss of time increases
Solution Approach 1:
The patent segments the visual space around a single stimulus into multiple directional regions, each representing a different command. This allows users to access multiple commands by gazing at different segments of the same visual area rather than moving their gaze across multiple separate stimuli, reducing the time required to execute multiple commands.
Solution Approach 2:
The patent introduces a directional dimension around a central visual stimulus, allowing users to select different commands by changing the angular position of their gaze rather than moving to different locations in the visual field. This dimensional transformation enables rapid command selection without the time penalty of gaze transitions between multiple stimuli.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces visual fatigue and processor burden while enabling rapid, accurate execution of multiple commands by leveraging electroencephalography signals and retina-cortex mapping principles, allowing a single visual stimulus to correspond to multiple operational commands.
Implementation Method 1
Electroencephalography (EEG) signals are a first choice non-invasive BCI technology at a current stage because of the following advantages: capable of directly reflecting electrophysiological activity information of a brain
Implementation Method 2
An event-related potential (ERP) is a measurement of a psychological response in a brain to a specific sensory, cognitive, or motor event or the like from an external environment
Data Source
AI summary
A human-computer interaction method, a human-computer interaction apparatus, and a storage medium are provided. The method includes: displaying a human-computer interface, where the human-computer interface includes an operable object and a visual stimulus region; and executing a first operational command on the operable object, where the first operational command is determined based on a first signal, the first signal is an electroencephalography signal generated when a user gazes at a first region, the first region is one of a plurality of regions around the visual stimulus region, different electroencephalography signals are generated when the user gazes at different regions of the plurality of regions, and the different electroencephalography signals indicate to execute different operational commands related to the operable object. According to this application, the user does not need to gaze directly at a visual stimulus and can deliver different operational commands quickly, which improves user experience.