虚拟场景漫游中用户关注度的内隐测量方法

Implicit measures of user attention in virtual environment navigation

目前测量用户关注度的主要方法是使用眼动仪,但其可靠性差、复杂度高且价格昂贵,难以有效应用于3D漫游场景的处理.本文提出一种易于嵌入到虚拟场景中的用户关注度软件测量方法,将用户操作虚拟摄像机漫游场景看作关注度内隐表达过程,通过物体相对摄像机中心的距离、遮挡情况和投影面积,并结合观察时间,就可以进行有效测量.通过用户学习分析,表明我们的方法具有很好的测量准确性、可靠性,并方便使用.将其应用于游戏场景物体关注度的评估中,获得了很好的效果.

The eye-tracker device is the main tool to obtain visual attention. However, it is hard to be applied in the 3D virtual scene navigation because of its poor reliability, great complexity and high price. We propose a new attention measure metric which can be easily embedded in the virtual environment. Behaviors of virtual camera controlled by the user are regarded as implicit expression of visual attention. The implicit expression is parameterized by the observed object＇s distance to the center of the camera, occlusion, projected area, and observation time. A sophisticated user study experiment is designed to verify the reliability of this kind of mea- surement. The proposed implicit measurement of user attention can be effectively applied to an application of user attention aided game design.