摘要
虚拟现实技术中,纹理的力触觉表达通常需要提取纹理表面的高度轮廓特征,从而再现纹理的凹凸感,而图像纹理则反映的是纹理表面的二维灰度特征。提出了一种根据图像灰度信息恢复表面三维轮廓(shape from shading,SFS),并用于纹理的力触觉表达的方法。采用Tsai&Shah算法从二维纹理图像中恢复出表面三维微观形状,并用力触觉模型渲染。该方法无需专门仪器测量物体表面的微观轮廓,无需设计专用的纹理力触觉表达装置。实验表明该方法是可行的,并通过对实验结果的分析给出了改进方向。
In virtual reality technology, haptic display of texture normally requires to extract three-dimensional contours of the surface to provide bump feeling, while texture image only reflects two-dimensional gray-scale surface texture characteristics. This paper proposes a new approach of haptic display of texture based on SFS ( shape from shading). Firstly, three-dimenstonaal micro-shape of the surface is recovered from two-dimensional texture images using Tsai & Shah algorithm, and then haptie render of the virtual surface is realized with the force rendering model. This method is independent of special instruments used to measure micro-contours and special texture haptic display devices. Experiments show that the method is feasible, and the directions of further improvement are given through the analysis of experimental results.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2010年第4期812-817,共6页
Chinese Journal of Scientific Instrument
基金
863计划(2006AA01Z329,2006AA04Z246,2009AA01Z311,2009AA01Z314)
国家自然科学基金(60775057,60675047)
教育部博士点新教师基金(200802861006)资助项目