PDF(Pubmed)
Abstract：
Thanks to the recent development of innovative instruments and software with high accuracy and resolution, 3D modelling provides useful insights in several sectors (from industrial metrology to cultural heritage). Moreover, the 3D reconstruction of objects of artistic interest is becoming mandatory, not only because of the risks to which works of art are increasingly exposed (e.g., wars and climatic disasters) but also because of the leading role that the virtual fruition of art is taking. In this work, we compared the performance of four 3D instruments based on different working principles and techniques (laser micro-profilometry, structured-light topography and the phase-shifting method) by measuring four samples of different sizes, dimensions and surface characteristics. We aimed to assess the capabilities and limitations of these instruments to verify their accuracy and the technical specifications given in the suppliers\' data sheets. To this end, we calculated the point densities and extracted several profiles from the models to evaluate both their lateral (XY) and axial (Z) resolution. A comparison between the nominal resolution values and those calculated on samples representative of cultural artefacts was used to predict the performance of the instruments in real case studies. Overall, the purpose of this comparison is to provide a quantitative assessment of the performance of the instruments that allows for their correct application to works of art according to their specific characteristics.
摘要：
由于最近开发了具有高精度和高分辨率的创新仪器和软件，3D建模在几个领域（从工业计量学到文化遗产）提供了有用的见解。此外，艺术感兴趣的物体的三维重建变得越来越强制性，不仅因为艺术品面临的风险越来越大(例如，战争和气候灾害），但也是因为艺术的虚拟成果正在发挥主导作用。在这项工作中,我们比较了四种基于不同工作原理和技术的3D仪器的性能(激光显微轮廓术，结构光形貌和相移法)通过测量四个不同尺寸的样本，尺寸和表面特征。我们旨在评估这些仪器的能力和局限性，以验证其准确性和供应商数据表中给出的技术规范。为此,我们计算了点密度，并从模型中提取了几个轮廓，以评估其横向（XY）和轴向（Z）分辨率。在实际案例研究中，使用标称分辨率值与在代表文化人工制品的样本上计算出的分辨率值之间的比较来预测仪器的性能。总的来说,这种比较的目的是对仪器的性能进行定量评估，以便根据其特定特征将其正确应用于艺术品。
