摘要
针对球面、立方体全景图获取比较困难等缺点,提出一种基于灭点圆的柱面全景图漫游方法.该方法在灭线的基础上引进灭点圆的思想,根据灭点圆的位置对柱面全景图进行背景建模,扩展灭线的应用范围;采用弧到线的转换提取底平面的纹理,避免地面视图变形;通过相关顶点的深度对纹理坐标进行变换,改进漫游的视觉效果.实验结果表明:该方法不仅能够实现水平方向360度的环视,而且能够实现一定深度的贯穿漫游,具有较好的真实感和沉浸感.
Aiming at the shortcomings of obtaining spherical and cubic panorama, the technique of tour into the cylindrical panorama based on vanishing circle is proposed in this paper. The vanishing circle idea is adopted to model on the foundation of the vanishing line. According to the location of vanishing circle, the background modeling of the cylindrical panorama is constructed. To avoid texture distortion, the conversion of arc to line is used to extract the ground plane texture. Additionally, to improve visual effect of the virtual tour, transform the texture coordinates according to the depths of the corresponding vertices. Experimental result demonstrates that the approach which can achieve the 360° horizontal field of view and the certain depth of throughout touring with a better wnse of realism and immersion.
出处
《微电子学与计算机》
CSCD
北大核心
2009年第11期21-24,29,共5页
Microelectronics & Computer
基金
国家自然科学基金项目(50571035)
关键词
漫游
柱面全景图
灭点圆
纹理映射
tour
cylindrical panorama
vanishing circle
texture mapping
