COMPARISON BETWEEN LASER SCANNING AND AUTOMATED 3D MODELLING TECHNIQUES TO RECONSTRUCT COMPLEX AND EXTENSIVE CULTURAL HERITAGE AREAS
COMPARISON BETWEEN LASER SCANNING AND AUTOMATED 3D MODELLING TECHNIQUES TO RECONSTRUCT COMPLEX AND EXTENSIVE CULTURAL HERITAGE AREAS
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DOI：
10.5194/isprsarchives-xl-5-w1-73-2013
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发表时间：
2013-02
期刊：
影响因子：
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通讯作者：
Francesco Fassi;L. Fregonese;S. Ackermann;V. Troia
中科院分区：
文献类型：
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作者：
Francesco Fassi;L. Fregonese;S. Ackermann;V. Troia
摘要。在文化遗产领域，快速测量物体的必要性日益增加，并且能够多次重复测量以进行变形或退化监测。本文介绍了两个重要的案例，一个建筑案例和一个考古案例。由于不同的原因和紧急情况，需要找到最佳的解决方案，以便能够快速和及时地对目标进行完整的数字重建。在这两种情况下，已经测试和使用了两种调查方法：一种是激光扫描方法，可以在短时间内获得高分辨率和完整的扫描，另一种是摄影测量方法，可以从图像中对物体进行三维重建。在过去的几个月中，出现了几种方法，包括免费或低成本的技术。这些类型的软件允许从图像中完全自动地三维重建物体，返回一个密集的点云，在某些情况下，一个表面的网格模型。本文以实际研究案例为例，对上述两种方法进行了比较。这些调查是采用摄影测量和激光扫描仪技术进行的。根据所需的目标、在使用这些方法进行调查时遇到的困难、执行时间（这是关键参数）以及最终获得的结果，对方法操作的选择进行了充分的描述和检查。在最终的三维模型上，进行了分析比较，分析了差异、公差、精度提高的可能性和未来的发展。
Abstract. In Cultural Heritage field, the necessity to survey objects in a fast manner, with the ability to repeat the measurements several times for deformation or degradation monitoring purposes, is increasing. In this paper, two significant cases, an architectonical one and an archaeological one, are presented. Due to different reasons and emergency situations, the finding of the optimal solution to enable quick and well-timed survey for a complete digital reconstruction of the object is required. In both cases, two survey methods have been tested and used: a laser scanning approach that allows to obtain high-resolution and complete scans within a short time and a photogrammetric one that allows the three-dimensional reconstruction of the object from images. In the last months, several methodologies, including free or low cost techniques, have arisen. These kinds of software allow the fully automatically three-dimensional reconstruction of objects from images, giving back a dense point cloud and, in some case, a surfaced mesh model. In this paper some comparisons between the two methodologies above mentioned are presented, using the example of some real cases of study. The surveys have been performed by employing both photogrammetry and laser scanner techniques. The methodological operational choices, depending on the required goal, the difficulties encountered during the survey with these methods, the execution time (that is the key parameter), and finally the obtained results, are fully described and examinated. On the final 3D model, an analytical comparison has been made, to analyse the differences, the tolerances, the possibility of accuracy improvement and the future developments.