城市景观三维重建及渲染算法研究  

3D Reconstruction and Rendering Algorithm of Urban Landscape

作　　者：徐莉[1] 兰玲[1] 

机构地区：[1]西南民族大学城市规划与建筑学院,成都610000

出　　处：《科技通报》2015年第7期97-100,共4页Bulletin of Science and Technology

摘　　要：针对现有的三维重建及渲染算法无法满足城市景观三维重建的需求问题,本文提出基于Kal-man滤波修正的三维重建算法和基于改进LOD的地形渲染算法。首先利用Kalman滤波修正算法对三维重建光束平差算法进行优化,加速原算法的响应时间,然后对LOD地形渲染算法进行优化,使用节点评价函数进行判断,节点是否需要进行分裂,从而实现不同的细节层次,利用添加边以及删减边结合的方法来消除地形中出现的裂缝。仿真试验结果表明,本文提出的基于Kalman滤波修正的三维重建算法和基于改进LOD的地形渲染算法在城市景观三维重建的应用中效果良好。According to the existing 3D reconstruction and rendering algorithms cannot meet the requirements of 3D reconstruction of urban landscape, 3D reconstruction algorithm based on Kalman filtering correction and terrain rendering algorithm based on the improved LOD are proposed. First, use the modified Kalman filtering algorithm to optimize 3D reconstruction beam adjustment algorithm, speed up the response time of the original algorithm, and then optimize the LOD terrain rendering algorithm;use node evaluation function to determine whether the nod need to split or not, to realize the different level of detail; combine the add and subtract edge to eliminate cracks of terrain. Simulation experiment results show that, the proposed 3D reconstruction algorithm based on Kalman filtering correction and terrain rendering algorithm based on the improved LOD have good effect in the application of 3D reconstruction of urban landscape.

关 键 词：城市景观三维重建 Kalman滤波修正算法 改进LOD算法 三维重建光束平差算法 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]