沉浸式数字地球人机交互参数阈值优化技术

Threshold Parameters Optimisation Techniques for Immersive Digital Earth Human-Computer Interaction

摘要:

数字地球应用广泛,沉浸式人机交互成为其中研究热点之一,设计实现一种沉浸式交互方案,通过佩戴虚拟现实头戴显示器实现数字地球跟随头部运动。但交互显示过程中存在数字地球漫游响应与用户动作不同步、显示不稳定等问题。针对上述问题提出二分法与正交实验法融合的参数阈值优化算法：对影响交互效果的数据接收时间间隔、状态判别阈值、头部运动速率等影响因素采用二分法确定不同因素水平进行正交实验,通过人员实际测试筛选出最优参数阈值。将最优参数应用到三维电子沙盘系统中,数字地球响应与用户动作匹配、显示流畅,验证算法有效性。

Abstract:

Digital Earth is widely used, and immersive human-computer interaction has become one of the research hotspots. An immersive interaction scheme is designed and implemented to achieve the digital Earth following head movements by wearing a virtual reality head-mounted display. However, during the interactive display process, there are problems such as the digital earth roaming response is not synchronised with the user"s movement, and the display is unstable. A parameter threshold optimisation algorithm integrating dichotomous method and orthogonal experiment method is proposed to address the above problems: the dichotomous method is used to determine the levels of different factors in the orthogonal experiments for the influencing factors such as the data reception time interval, the state discrimination threshold, and the rate of head movement which affects the interaction effect. Afterwards, the optimal parameter thresholds are screened out through the actual testing by the personnel. The optimal parameters are applied to the three-dimensional electronic sand table system. The digital Earth response matches the user"s movement and displays smoothly thereby verifying the effectiveness of the algorithm.