MRI: Acquisition of a 3d Photogrammetry Light Stage System for Scanning Shape, Motion and Appearance

本项目获取具有自动同步和配准功能的3D摄影测量光台仪器，用于亚毫米精度的三维形状瞬时扫描、运动捕捉和捕获反射率特性，旨在同时捕获多达128个视角和156个照明角度的图像样本。它将提供从几厘米到几米的尺寸范围内的亚毫米精度的3D形状的瞬时扫描，并且还将提供随时间的运动捕捉。与大多数其他摄影测量系统不同，该设备还可以捕获反射特性，从而产生准确的外观。这个工具将有助于广泛的跨学科项目和研究（在斯托特和邻近的博士学位授予机构），并通过与艺术和历史博物馆和非营利组织的合作，更广泛地丰富公众。基于摄影测量的系统获取关于物体的信息？S的形状和外观，通过多个角度的物体图像。通过适当的相机阵列，可以在几分之一秒内捕获物体，并且不需要标记或修改物体的材料。此外，数据的精度和密度可与激光扫描设备相媲美。更令人信服的是，这些数据与计算机图形光场研究中使用的更复杂和定制的光台所捕获的数据相似。然而，在这些领域之间仍然存在着差距，这一工具及其研究将努力消除这一差距。该仪器将支持与明尼阿波利斯艺术学院的摄影师和戈尔茨坦设计博物馆馆长的合作。这些博物馆都向公众开放，并有一个共同的愿望，即把他们的作品传播到更广泛的社区。这台仪器也将有助于Xan Scan公司的工作，该公司寻求从较小的公共博物馆捕获具有重要历史价值的物品（包括美洲原住民和古代中国文物）。Xan Scan与学校共享这些扫描结果，以一种非常经济有效的方式扩大了学生们无法参观这些博物馆的机会。该仪器将用于该机构的几门课程，以加强对设计，计算机科学和数字人文学科本科生的教育。学生将有机会使用该设施，并在这些领域的研究方面得到更好的训练。这种影响应该会进一步扩散。由于进入这一领域的难度，商业摄影测量软硬件尚未实现与光场渲染研究对接的潜力。该文书所促成的工作寻求一种补救办法，并为表示、呈现和共享这些数据提供了一个开放的标准。讨论了一些项目示例，包括与设计师合作，将基于摄影测量的对象引入设计过程和博物馆策展人，为先进的考古和历史研究扫描对象，以及开发数字展品，以便更广泛地访问他们的文物。尽管摄影测量学很有用，但档案保存组织并没有接受它，可能是因为对数据、格式和存储标准的理解不足。因此，档案工作者和历史学家将专门参与解决这些问题，并建立或扩展元数据、摄影测量图像和3D模型的标准。

This project, acquiring a 3D photogrammetric light stage instrument with automatic synchronization and registration for instantaneous scanning of 3D shapes with submillimeter accuracy, motion capture, and capture reflectance properties, aims to capture image samples up to 128 viewing angles and 156 lighting angles simultaneously. It will afford the instantaneous scanning of 3D shape with sub-millimeter accuracy in a range of sizes from a few cm up to several meters and will also afford capture of motion over time. Unlike most other photogrammetry systems, the device can also capture reflectance properties giving rise to accurate appearance. This instrument would contribute to a wide range of interdisciplinary projects and research (both at Stout and at neighboring Ph.D. granting institutions) as well as broader enrichment of the public through partnerships with art and history museums and non-profits. Photogrammetry-based systems acquire information about an object?s shape and appearance via images of the object from multiple angles. With a proper array of cameras the object can be captured in a fraction of a second and no markers or modification of the material of the object is necessary. Moreover, the precision and density of the data is comparable to laser scanning devices. Even more compelling is the similarity of this data to that captured by more complex and custom light stages used in computer graphics light field research. However, a gap still exists between these areas that this instrument, and the research it enables, will endeavor to eliminate. This instrument will support collaboration with photographers at the Minneapolis Institute of Art and with the director of the Goldstein Museum of Design. These museums are open to the public and have a common desire to spread their works into the wider community. This instrument will also contribute to the work of the company Xan Scan that seeks to capture objects of significant historical value (including Native American and ancient Chinese artifacts) from smaller public museums. Xan Scan shares these scans with schools providing broadening the access of students that would otherwise not be able to visit these museums in a very cost effective manner. The instrument will be used in several courses at the institution to enhance education of undergraduate students in design, computer science, and digital humanities. Students will have access to the facility and be better trained for research in these areas. The impact should spread further. Due to the difficulty of entry into this area, commercial photogrammetry software and hardware has not realized the potential to connect to light field rendering research. The work enabled by this instrument seeks a remedy and provides an open standard for representing, rendering, and sharing this data. Some project examples are discussed, including work with designers to introduce photogrammetry based objects into the design process and museum curators, to scan objects for advanced archeological and historical research, as well as the development of digital exhibits for wider access to their artifacts. Despite the usefulness, photogrammetry has not been embraced by the archival preservation group, possibly because of insufficient understanding of the data and format and storage standards. Hence, archivists and historical personnel will be involved specifically with the goal of addressing these issues and establishing or expanding standards for metadata, photogrammetry images and 3D models.