多通道笔式界面中的模式切换

Mode Switching in Multi-Modality Pen Interface

针对笔式用户界面中模式切换效率低的问题,设计了模式切换技术并开展实验对其评价.首先,利用笔压力、笔倾斜和笔方位通道,按照笔通道轨迹和笔通道离散化方式,设计了笔压力轨迹、笔倾斜轨迹、笔方位轨迹、笔压力离散化、笔倾斜离散化和笔方位离散化等6种模式切换技术.其次,以绘画过程中调整线条的颜色和粗细为场景,设计并在Wacom Intuos 3上开展实验,对比考察6种模式切换技术以及参照技术的性能.实验结果表明,笔压力轨迹技术的综合性能最好,其时间消耗比参照技术减少了20.13%,综合性能比参照技术提升了37.68%;笔倾斜轨迹技术、笔方位轨迹技术和笔方位离散化技术的时间消耗比参照技术分别减少了11.12%,2.65%和10.70%;笔倾斜离散化技术和笔方位离散化技术的错误率相对于参照技术分别减少了62.82%和32.38%.最后,分析了模式切换技术的性能,给出了合理设置阈值、分析上下文环境和选择合适切换级别等模式切换技术的改进措施.

Aiming at the low efficiency of mode switching in pen user interface,mode switching techniques are designed and evaluated.First,6 mode switching techniques which are pen-pressure-trajectory,pen-tilt-trajectory,pen-azimuth-trajectory,pen-pressure-discretization,pen-tilt-discretization and pen-azimuth-discretization are designed according to pen-modality-trajectory and pen-modality-discretization by using pen pressure,pen tilt and pen azimuth modalities.Second,the comparative experiment of color and thickness adjustment in the process of painting is designed and carried out on the Wacom Intuos 3 to evaluate the performance of the mode switching techniques and the referencing technique.The experimental results showed that the pen-pressure-trajectory technique has the best comprehensive performance.Its time consumption is reduced by 20.13%and its comprehensive performance is improved by 37.68%compared to the referencing technique.The time consumption of pen-tilt-trajectory technique,pen-azimuth-trajectory technique and pen-azimuth-discretization technique are reduced by 11.12%,2.65%and 10.70%respectively compared to the referencing technique.The error rates of pen-tilt-discretization technique and pen-azimuth-discretization technique are reduced by 62.82%and 32.38%respectively compared to the referencing technique.Last,the performance of mode switching techniques are analyzed,and the improvement measures of mode switching technique such as setting reasonable threshold,analyzing context environment and selecting appropriate switching level are given.