RECORDING APPROACH OF HERITAGE SITES BASED ON MERGING POINT CLOUDS FROM HIGH RESOLUTION PHOTOGRAMMETRY AND TERRESTRIAL LASER SCANNING
RECORDING APPROACH OF HERITAGE SITES BASED ON MERGING POINT CLOUDS FROM HIGH RESOLUTION PHOTOGRAMMETRY AND TERRESTRIAL LASER SCANNING
复制标题
基于高分辨率摄影测量与地面激光扫描点云融合的遗产地记录方法
DOI：
10.5194/isprsarchives-xxxix-b5-553-2012
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
E. Smigiel
中科院分区：
文献类型：
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作者：
P. Grussenmeyer;E. Alby;T. Landes;M. Koehl;S. Guillemin;J. Hullo;Pierre Assali;E. Smigiel
文化遗产文献工作需要不同的方法和工具来处理古迹和遗址的复杂性。在过去的几年里，文档流程发生了巨大的变化，始终是由技术驱动的。准确的文献记录密切依赖于技术的进步（成像传感器，高速扫描，记录和处理数据的自动化），用于保护工程，管理，评估，结构状况评估，存档，出版和研究（Patias等人，2008年）。我们希望集中在本文中的记录方面的文化遗产的文件，特别是几何和逼真的三维模型的准确重建和可视化的目的的生成。选定的方法是基于摄影测量密集匹配和地面激光扫描（TLS）技术的组合。这两种技术都有优点和缺点，最近的进步已经改变了记录方法的方式。最佳工作流程的选择取决于站点配置、传感器的性能以及几何形状、精度、分辨率、地理参考、纹理等标准，当然还有处理时间。TLS技术（飞行时间或相移系统）被广泛用于记录大型和复杂的物体和地点。通过密集立体或多视图匹配从图像生成点云可以用作TLS的替代或补充方法。与TLS相比，摄影测量解决方案是一种低成本解决方案，因为采集系统仅限于高性能数码相机和少数配件。事实上，立体或多视图匹配过程提供了一种廉价、灵活和准确的解决方案来获得3D点云。此外，捕获的图像还可以用于模型纹理化。有几个软件包可供使用，无论是基于网络的、开放源码的还是商业的。这种基于摄影测量或计算机视觉的技术的主要优点是同时获得点云（分辨率取决于对象上像素的大小），因此可以获得具有纹理的精确网格对象。在匹配和处理步骤之后，我们可以以与TLS点云大致相同的方式使用结果数据，但除此之外还包含纹理的辐射信息。本文的讨论回顾了记录和重要的处理步骤，如地理参考和数据合并，结果的基本评估，以及摄影测量和地理信息组（INSA斯特拉斯堡，法国）的项目交付的例子。
Different approaches and tools are required in Cultural Heritage Documentation to deal with the complexity of monuments and sites. The documentation process has strongly changed in the last few years, always driven by technology. Accurate documentation is closely relied to advances of technology (imaging sensors, high speed scanning, automation in recording and processing data) for the purposes of conservation works, management, appraisal, assessment of the structural condition, archiving, publication and research (Patias et al., 2008). We want to focus in this paper on the recording aspects of cultural heritage documentation, especially the generation of geometric and photorealistic 3D models for accurate reconstruction and visualization purposes. The selected approaches are based on the combination of photogrammetric dense matching and Terrestrial Laser Scanning (TLS) techniques. Both techniques have pros and cons and recent advances have changed the way of the recording approach. The choice of the best workflow relies on the site configuration, the performances of the sensors, and criteria as geometry, accuracy, resolution, georeferencing, texture, and of course processing time. TLS techniques (time of flight or phase shift systems) are widely used for recording large and complex objects and sites. Point cloud generation from images by dense stereo or multi-view matching can be used as an alternative or as a complementary method to TLS. Compared to TLS, the photogrammetric solution is a low cost one, as the acquisition system is limited to a high-performance digital camera and a few accessories only. Indeed, the stereo or multi-view matching process offers a cheap, flexible and accurate solution to get 3D point clouds. Moreover, the captured images might also be used for models texturing. Several software packages are available, whether web-based, open source or commercial. The main advantage of this photogrammetric or computer vision based technology is to get at the same time a point cloud (the resolution depends on the size of the pixel on the object), and therefore an accurate meshed object with its texture. After matching and processing steps, we can use the resulting data in much the same way as a TLS point cloud, but in addition with radiometric information for textures. The discussion in this paper reviews recording and important processing steps as geo-referencing and data merging, the essential assessment of the results, and examples of deliverables from projects of the Photogrammetry and Geomatics Group (INSA Strasbourg, France).