基于激光扫描和倾斜摄影技术的三维实景融合建模研究

Research on 3D real scene fusion modeling based on laser scanning and oblique photography

为了快速、高精度、高效率地构建三维实景模型,利用倾斜摄影三维建模技术能够较好地获取目标物中上部分的影像数据,以及三维激光扫描技术可以较好地获取目标物中下部分影像数据的优点,提出一种基于激光扫描和倾斜摄影技术的三维实景融合建模方法。针对无人机倾斜摄影和三维建模技术,构建三维建模精度多层次模糊综合评价模型,利用点云的高精度配准可靠地实现快速、高效的实景三维构建,实现了无人机倾斜摄影测量三维建模精度实时评价。最后,选择了3种方法的同条件三维实景融合建模的50个检查点,并进行数据对比分析。结果表明,所提融合建模方法的建模时间和精度均优于单一数据源建模方法,具有较好的应用价值。

In order to construct a three-dimensional real-world model quickly,accurately and efficiently,the use of oblique photography three-dimensional modeling technology can better obtain the image data of the upper part of the target,and the three-dimensional laser scanning technology can better obtain the lower part of the target With the ad-vantages of image data,a 3D real scene fusion modeling method based on laser scanning and oblique photography tech-nology is proposed.A multi-level fuzzy comprehensive evaluation model of 3D modeling accuracy is constructed for the 3D modeling technology of UAV tilt photography,and real-time evaluation of the 3D modeling accuracy of UAV tilt photogrammetry is realized.Finally,50 checkpoints of 3D real-scene fusion modeling under the same conditions were selected by 3 methods and compared and analyzed.The results show that the modeling time and accuracy of the pro-posed fusion modeling method are better than the single data source modeling method,and it has better application val-ue.