屏幕区域对笔通道输入性能的影响

Influence of Screen Region on Pen Modality Input Performance

针对笔通道输入在不同屏幕区域上的差异,分析了屏幕区域对笔通道输入的影响.首先设计了轨迹非受限的书写和轨迹受限的划动2种不同的笔式输入实验任务,然后在Wacom Cintiq 21UX上展开实验并对比考察了笔通道输入在不同屏幕区域的性能.实验结果表明,以屏幕一角为极点所形成的极坐标系中,笔通道值随极径的增加而增大,笔通道值与极径之间呈幂函数关系或线性关系;各笔通道值的极值通常出现在屏幕的角落区域;对以右手为惯用手的用户来说,屏幕上侧的笔倾斜角通常大于屏幕下侧的笔倾斜角,笔的方位角随屏幕区域位置呈顺时针减小再增加的趋势;屏幕被划分的数量和屏幕上的不同区域位置均对交互性能存在显著影响;随着屏幕区域划分数量的增加,各区域之间的均值差异减小;结合划动速度、脱离错误率、偏出轨道率和偏离中线值,中部区域的综合性能优于四周区域,小尺寸区域的综合性能优于大尺寸区域,上侧区域的综合性能优于下侧区域.最后给出了面向屏幕区域的交互设计建议,为面向屏幕区域的笔通道交互提供了参考依据.

Aiming at the differences of pen modality inputs in different screen regions,the influences of screen regions on pen modality inputs were investigated.At first,two pen input tasks which were writing task with unrestricted trajectory and sliding task with restricted trajectory were designed.Then,the performance of pen modality inputs in different screen regions was empirically explored on Wacom Cintiq 21UX.The experimental results showed that in the polar coordinate system whose pole coincided with the vertex of a screen corner,the pen modality values increased with the polar diameters,and power or linear relationships were found between the pen modality values and the polar diameters.The extreme values of each pen modality usually appeared in the corner regions of the screen.For the right-handed users,the pen tilt angle on the upper side of the screen was usually larger than that on the lower side of the screen.The pen azimuth decreased and then increased along with the position of the screen regions clockwise.The number and the location of screen regions significantly influenced the interaction performance.With the increase of the number of screen regions,the mean differences between screen regions decreases.According to the sliding speed,the release error rate,the out-of-path rate,and the deviation from tunnel center,the comprehensive performances of small regions,the central regions,and the upper regions were better than those of larger regions,the surrounding regions,and the lower regions.At last,the suggestions of interaction design with screen regions are given,which provides reference for the pen modality interaction with screen regions.