国防科技大学学报Issue(6)：31-36,6.DOI:10.11887/j.cn.201406006
近界视景导航中森林场景加速绘制
Accelerating rendering of the forest scene in the near-ground visual navigation
摘要
Abstract
As the typical ground objects in near-ground visual navigation application,the three-dimensional geometrical models of trees can improve the visual precision and the reality of virtual scene.However,it may lead to the decrease in rendering efficiency of a wide forest scene and result in the loss of navigation precision.In order to boost the rendering efficiency to ensure the navigation precision and maintain the sense of reality,billboard clouds algorithm was employed to establish the multi-resolution tree models based on view distance and its disadvantages existing in near-ground visual navigation application were improved.To improve the visual navigation precision with high dynamic viewpoint in the near-ground especially the nap-of-the-earth flight further,an accelerating rendering algorithm based on high dynamic viewpoint was proposed in accordance with the characteristics of limited horizon,threatened area and redundant vision.The contrast analysis of experiments testifies that the proposed algorithm improves the rendering efficiency,enhances the vision quality of the scene and raises the navigation precision of virtual scene.关键词
视景导航/布告板云/贴地飞行/视域/视觉冗余Key words
visual navigation/billboard clouds/nap-of-the-earth flight/field of view/visual redundancy分类
信息技术与安全科学引用本文复制引用
卞燕山,邹鹏,于荣欢,吕雅帅..近界视景导航中森林场景加速绘制[J].国防科技大学学报,2014,(6):31-36,6.基金项目
国家自然科学基金资助项目（61202129）；国家科技重大专项资助项目 （）
