Virtualizing ancient Rome: 3D acquisition and modeling of a large plaster-of-Paris model of imperial Rome
Virtualizing ancient Rome: 3D acquisition and modeling of a large plaster-of-Paris model of imperial Rome
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虚拟化古罗马：罗马帝国大型石膏模型的 3D 采集和建模
DOI：
10.1117/12.587355
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Tommaso Grasso
中科院分区：
文献类型：
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作者：
Gabriele Guidi;B. Frischer;M. D. Simone;A. Cioci;A. Spinetti;Luca Carosso;L. Micoli;M. Russo;Tommaso Grasso
通过数字范围图像的计算机建模已被用于许多应用，包括属于我们的文化遗产的对象的3D建模。所涉及的规模从小型物体（如陶器）到中型艺术品（雕像，建筑装饰），直到非常大的结构（建筑和考古纪念碑）。对于这些应用中的任何一个，不同的作者已经探索了合适的传感器和方法。该项目中的模型是“Plastico di Roma antica”，这是一个在上个世纪创建的帝国罗马的大型巴黎石膏模型（16 x17米）。因此，它的整体尺寸要求采用典型的大型结构的采集方法，但它也具有典型的小型物体的极其微小的细节（房屋只有几厘米高;它们的门，窗户等小于1厘米）。本文介绍了解决这一“矛盾”的过程，并描述了如何使用一个特殊的
计量激光雷达在一个单一的参考系统的巨大的点云获得后，每个采集阶段，由于固定的冗余参考的测量，重新定向的程序进行了说明。为了进行网格编辑，将数据集分割为较小的子区域，每个子区域为2 x 2米。这种细分是必要的，因为每个单独扫描中的点数量巨大（5000万至6000万）。编辑后的零件的最终合并使得创建单个网格成为可能。所有这些过程都是使用专门为此项目设计的软件进行的，因为没有任何商业软件包适合管理如此大量的点。提出了初步模型。最后，该项目的意义被称为“罗马重生”，其中目前的收购是一个重要组成部分的整体项目进行了讨论。
Computer modeling through digital range images has been used for many applications, including 3D modeling of objects belonging to our cultural heritage. The scales involved range from small objects (e.g. pottery), to middle-sized works of art (statues, architectural decorations), up to very large structures (architectural and archaeological monuments). For any of these applications, suitable sensors and methodologies have been explored by different authors. The object to be modeled within this project is the "Plastico di Roma antica," a large plaster-of-Paris model of imperial Rome (16x17 meters) created in the last century. Its overall size therefore demands an acquisition approach typical of large structures, but it also is characterized extremely tiny details typical of small objects (houses are a few centimeters high; their doors, windows, etc. are smaller than 1 centimeter). This paper gives an account of the procedures followed for solving this "contradiction" and describes how a huge 3D model was acquired and generated by using a special
metrology Laser Radar. The procedures for reorienting in a single reference system the huge point clouds obtained after each acquisition phase, thanks to the measurement of fixed redundant references, are described. The data set was split in smaller sub-areas 2 x 2 meters each for purposes of mesh editing. This subdivision was necessary owing to the huge number of points in each individual scan (50-60 millions). The final merge of the edited parts made it possible to create a single mesh. All these processes were made with software specifically designed for this project since no commercial package could be found that was suitable for managing such a large number of points. Preliminary models are presented. Finally, the significance of the project is discussed in terms of the overall project known as "Rome Reborn," of which the present acquisition is an important component.