基于增强现实技术的景观规划系统

Scene-Planning System Based On Augmented Reality Technique

增强现实是把计算机产生的虚拟物体或其他信息合成到用户看到的真实世界中的一种技术 .利用增强现实技术 ,设计人员能够有效地进行建筑布局的规划和设计 .本文介绍了一个典型的增强现实系统——景观规划系统的实现 .针对合成虚拟景物和真实场景过程中需要解决的几何一致性和光照一致性问题 ,采用了局部三维重建和交互的相机定标技术来实现几何一致性 ;对于光照一致性 ,则采用了光照交互指定和自动恢复相结合的方法 ,同时还考虑了虚拟物体投射的阴影 .针对不同场景的实际应用 ,依据系统生成的结果合成图象 ,设计人员能够比较有效地完成对景观规划结果的直观评估 .

Augmented Reality(AR) is a growing area in virtual reality research. It merges the virtual object or other additional information generated by the computer into the user's view of the real world. It is helpful to apply AR technique to the scene planning for architectural designers or beauty spot developers. In this paper, a typical AR application system--Scene Planning is introduced to demonstrate this idea.To combine the virtual buildings and real scene, the geometric coherence and illumination coherence problem must be sloved. The local 3D reconstruction and interactive camera calibration are used to resolve the geometric problem. For the illumination problem, the interactive and untomatic method is combined,and the shadow of the virtual object is also taken into account. The human's interaction is also involved during the above process. By evaluating the result image synthesized from various view angles, the designer can estimate and optimize the layout of virtual scene intuitively, and eliminate the inaccuracy during the planning process. Finally, some work under improvement and future research are also discussed.