基于三维场景出图的拼接制作2.5维地图算法

Generation of 2. 5-dimensional map based on mosaic image created in three-dimensional scenes

针对目前2.5维电子地图的制作与其三维虚拟场景相对独立,且不易更新维护的问题,提出了对三维场景进行图片输出并拼接实现2.5维地图制作的算法。首先设定摄像机长宽值作为最小出图单位,在指定范围内,使用最小出图单位以任意水平角度和俯仰角度输出三维虚拟场景效果图,并记录相关空间信息。然后根据图片左上角点坐标值对所输出图片进行无缝拼接。实验结果表明,该方法在保证地图空间实体表现能力的同时,能够快速替换图中更新区域,提高2.5维地图制作效率。

Considering the relative independence between the fabrication of 2. 5 dimensional electronic maps and their 3 dimensional virtual scenes and the difficulty of maintenance and updating, a new algorithm was proposed to make a 2. 5D map according to output pictures in 3D scenes. First, set the camera width value as the minimum map unit, and then use this unit to output 3D virtual scene rendering by arbitrary horizontal angle and pitching angle within specified range; meanwhile, record relevant spatial information. Second, splice the output pictures seamlessly in accordance with the point coordinates on the top left corner of the pictures. Experimental results show, besides maintaining the performance of spatial entity of the maps, the proposed method can replace the updating areas effectively and improve the fabricating efficiency of 2. 5D maps.