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Automated full-3D digitization system for documentation of paintings

机译：自动化的全3D数字化系统，用于绘画文档

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In this paper, a fully automated 3D digitization system for documentation of paintings is presented. It consists of a specially designed frame system for secure fixing of painting, a custom designed, structured light-based, high-resolution measurement head with no IR and UV emission. This device is automatically positioned in two axes (parallel to the surface of digitized painting) with additional manual positioning in third, perpendicular axis. Manual change of observation angle is also possible around two axes to re-measure even partially shadowed areas. The whole system is built in a way which provides full protection of digitized object (moving elements cannot reach its vicinity) and is driven by computer-controlled, highly precise servomechanisms. It can be used for automatic (without any user attention) and fast measurement of the paintings with some limitation to their properties: maximum size of the picture is 2000mm × 2000mm (with deviation of flatness smaller than 20mm) Measurement head is automatically calibrated by the system and its possible working volume starts from 50mm × 50mm × 20mm (10000 points per square mm) and ends at 120mm × 80mm × 60mm (2500 points per square mm). The directional measurements obtained with this system are automatically initially aligned due to the measurement head's position coordinates known from servomechanisms. After the whole painting is digitized, the measurements are fine-aligned with color-based ICP algorithm to remove any influence of possible inaccuracy of positioning devices. We present exemplary digitization results along with the discussion about the opportunities of analysis which appear for such high-resolution, 3D computer models of paintings.
机译：在本文中，提出了一种用于绘画记录的全自动3D数字化系统。它由一个专门设计的框架系统（用于安全固定绘画），一个定制设计的，结构化的，基于光的高分辨率测量头组成，没有IR和UV发射。该设备自动定位在两个轴上（平行于数字化涂漆的表面），并手动定位在垂直的第三轴上。也可以绕两个轴手动更改观察角度，以重新测量甚至部分阴影的区域。整个系统的构建方式可以完全保护数字化对象（运动元素无法到达其附近），并由计算机控制的高精度伺服机构驱动。它可用于自动（无需用户注意）和快速测量绘画，但对绘画的性能有一些限制：图片的最大尺寸为2000mm×2000mm（平面度偏差小于20mm）。系统及其可能的工作体积从50mm×50mm×20mm（每平方毫米10000点）开始，到120mm×80mm×60mm（每平方毫米2500点）结束。由于伺服机构已知测量头的位置坐标，因此使用此系统获得的方向测量值将自动自动进行初始对齐。将整个绘画数字化后，将测量结果与基于颜色的ICP算法进行精确对齐，以消除对定位设备可能不准确的任何影响。我们提供了示例性的数字化结果，以及有关此类高分辨率3D计算机绘画模型出现的分析机会的讨论。

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