ABSTRACT This paper focuses on the use of the photogrammetric method to obtain 3D model of artworks for their characterisation and conservation. The high-resolution reproduction of a piece of art allows both the identification of constituent materials, decorative elements and detailed features and its digitalisation and enjoyment and then enhancement. In this study the approach was applied to the polychrome marble altars in the crypt of the St. Sabino’s cathedral and in the St. Giacomo’s church, both in Bari (Italy), significant evidences of virtuosity of Baroque sculptors and of use and reuse of precious Roman marbles combined with more recent and local stones. For this purpose, firstly, a three-dimensional model and high definition survey were performed by collection of numerous photographs and their processing using photogrammetric method and digital survey software; in addition, identification of Roman marbles and other decorative stones was carried out in terms of lithological classification, provenance locality, the historical period of employ. Results, obtained through an inexpensive, fast and complete survey, allowed to produce a high definition representation of the altars for a complete mapping of used material and decorative features and to guarantee their conservation, sharing and enhancement.

中文翻译：

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摄影测量和 3D 模型作为绘制艺术品中彩色大理石的实验工具：以巴里（意大利）的两个巴洛克祭坛为例

摘要 本文着重于使用摄影测量方法来获得艺术品的 3D 模型，以对其进行表征和保护。一件艺术品的高分辨率复制允许识别构成材料、装饰元素和详细特征，以及它的数字化和享受，然后增强。在这项研究中，该方法被应用于巴里（意大利）圣萨比诺大教堂的地下室和圣贾科莫教堂的彩色大理石祭坛，这是巴洛克雕塑家精湛技艺以及珍贵的使用和再利用的重要证据。罗马大理石与更近代和当地的石头相结合。为此，首先，采集海量照片，利用摄影测量法和数字测量软件进行三维模型和高清测量；此外，还从岩性分类、产地、使用历史时期等方面对罗马大理石等装饰石材进行了鉴定。通过廉价、快速和完整的调查获得的结果允许生成祭坛的高清晰度表示，用于完整映射使用的材料和装饰特征，并保证它们的保护、共享和增强。