基于两类运动想象的二维光标控制的研究

摘要

In brain computer interface, the 2D cursor control is research focus for its implemented and quantified easily feature, which could play a role in the prototype for testing new paradigm or new algorithm. In order to reduce the workload and realize the random movement of the cursor in the plane, we design a new 2D control strategy based on two-class Motor Imagery. By mapping the output probabilities from the classifier to the rotating coordinate system, we achieved the 2D cursor movement. In the end, we design a five-fixed target experiment, four subjects were invited and their online performances validate the proposed cursor control work very well.%在脑－机接口研究中，二维光标控制由于易实现、量化可以作为测试新范式和新算法原型的特点，一直是研究的热点。基于减小使用者的控制难度，实现光标在二维平面内任意位置移动的目标，我们仅使用两类运动想象就实现了光标的二维控制。通过把分类器的输出概率映射到我们设计的旋转控制坐标系中，实现光标二维移动。结合最后设计的一种固定5目标的验证实验，邀请4人参与该实验，从他们的控制效果上，可以得到控制策略简单有效的结论。