The Process of Creating Accurate Reproductions of Fragile Objects: Fabricating 3D Facsimiles with Limited Resources

Museums and other cultural institutions must consider how to best preserve their collections for an exponentially digital world. Our digital age is providing new avenues for preservation, accessibility, viewing, and interaction. This thesis assesses the feasibility of utilizing and creating accessible and readable 3D digital surrogates and prints. To consider and adapt current best practices what are the implications of creating accurate reproductions for the research environment as well as for online and in person use”? This thesis presents themes that relate to the broader fields of digitization, reproduction, and fabrication in museums and cultural institutions, presents findings in the form of a literature review, and accounts for my own experimentation with the resources to which I have access at Rochester Institute of Technology (RIT). This thesis engages collaboration with two key partners: RIT’s all-access makerspace, The Construct, and the Melbert B. Cary Graphic Arts Collection. Under the advisement of Mike Buffalin and Dr. Steven Galbraith, I scanned a papier-mâché bound book in 3D to create a digital surrogate which has two purposes: a digital rendering to be made available online and a material output when the file was printed in three dimensions using polylactic acid (PLA) low-cost filament. The viability of this project is defined by the accuracy of the reproductions, the resources necessary, and the time commitment required for this project to be adapted by small institutions. This project is an inexpensive and proactive alternative to seeking conservation treatment and will further enable non-local audiences to interact with distant materials. Ultimately, the project supplies small institutions with less expensive options to digitize and create surrogates of their collections, offer a model procedure for the fabrication of online and physical facsimiles, and provide a list of digitization connections within the RIT community

Hard-Hearted Scrolls: A Noninvasive Method for Reading the Herculaneum Papyri

The Herculaneum scrolls were buried and carbonized by the eruption of Mount Vesuvius in A.D. 79 and represent the only classical library discovered in situ. Charred by the heat of the eruption, the scrolls are extremely fragile. Since their discovery two centuries ago, some scrolls have been physically opened, leading to some textual recovery but also widespread damage. Many other scrolls remain in rolled form, with unknown contents. More recently, various noninvasive methods have been attempted to reveal the hidden contents of these scrolls using advanced imaging. Unfortunately, their complex internal structure and lack of clear ink contrast has prevented these efforts from successfully revealing their contents. This work presents a machine learning-based method to reveal the hidden contents of the Herculaneum scrolls, trained using a novel geometric framework linking 3D X-ray CT images with 2D surface imagery of scroll fragments. The method is verified against known ground truth using scroll fragments with exposed text. Some results are also presented of hidden characters revealed using this method, the first to be revealed noninvasively from this collection. Extensions to the method, generalizing the machine learning component to other multimodal transformations, are presented. These are capable not only of revealing the hidden ink, but also of generating rendered images of scroll interiors as if they were photographed in color prior to their damage two thousand years ago. The application of these methods to other domains is discussed, and an additional chapter discusses the Vesuvius Challenge, a $1,000,000+ open research contest based on the dataset built as a part of this work

An integrated study of earth resources in the state of California using remote sensing techniques Progress report

Integrated approach to water management by remote sensing in Californi

Laser Scanning as a Methodology for the 3-D Digitization of Archaeological Ship Timbers: A Case Study Using the World Trade Center Shipwreck

Accurate documentation of cultural heritage material is essential to its study and interpretation by archaeologists. In order to continually refine the documentation process, technological advances are incorporated into traditional methodologies. This study demonstrates the utility of high-definition laser scanning for the documentation of disarticulated timbers from the ship remains found during the excavation of the former site of the World Trade Center in New York City. Laser scanned models of the timbers were used to virtually re-assemble the ship, produce traditional scaled drawings for standard documentation, loft a series of ship lines for reconstruction modeling, and to produce a scaled 3-D printed model of the ship

Innovative Use and Integration of Remote Sensed Geospatial Data for 3D City Modeling and GIS Urban Applications

Modern remote sensing instruments, mounted on a modern aerial platform and assisted through the use of automated procedures are now capable of acquiring data over a vast area in a short timeframe. Thanks to innovative processing methods and algorithms it is then possible to rapidly deliver results with a high detail and accuracy. The discussed thesis provides a detailed overview, through different case studies and examples, on the evolving complete pipeline required to survey, process, store, integrate, analyze and deliver data in the form of a 3D city model and GIS in the urban environment. A comprehensive 3D city model is, in fact, the necessary multi-disciplinary backbone for the ubiquitous sensors of a Smart City

Earth Resources: A continuing bibliography, with indexes, issue 31

This bibliography lists 505 reports, articles, and other documents introduced into the NASA scientific and technical information system. Emphasis is placed on the use of remote sensing and geophysical instrumentation in spacecraft and aircraft to survey and inventory natural resources and urban areas. Subject matter is grouped according to agriculture and forestry, environmental changes and cultural resources, geodesy and cartography, geology and mineral resources, hydrology and water management, data processing and distribution systems, instrumentation and sensors, and economic analysis

On the popularization of digital close-range photogrammetry: a handbook for new users.

Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Γεωπληροφορική

An integrated study of earth resources in the state of California using remote sensing techniques

The earth resources study for California is reported. The objectives, user needs, water management, data acquisition, data processing, and atmospheric effects in image transfer are discussed

Three-Dimensional Structural Analysis of Temple 16 and Rosalila at Copan Ruinas

Temple 16 is an ancient Maya structure located at the heart of the Copán Ruinas Acropolis in Western Honduras. Temple 16 contains several earlier structures within it that were built on top of each other throughout Copán’s history. One of these earlier structures, Rosalila, is one of the most culturally significant structures within the Acropolis due to its preservation. An intricate series of archeological tunnels have been excavated throughout Temple 16 to allow for its study. However, significant cracking has been observed within Rosalila and several tunnels have experienced partial collapse. This not only poses a life safety issue for those utilizing the tunnels, but also demonstrates the risk to invaluable cultural heritage. To this end, this thesis aims to provide a rigorous structural assessment of Temple 16 and the buried Rosalila structure, accounting for its complex 3D tunnel system, to understand the leading causes of tunnel collapse and structure deterioration. Geometric data was collected of the acropolis, Temple 16, Rosalila, and the complex network of tunnels using a combination of ground-based lidar and uncrewed aerial systems. The resulting point clouds were vectorized to yield a series of connected surfaces, which were then meshed as a solid to facilitate finite element analysis. Analyses were conducted to understand both the current stress distribution within Temple 16 as well as to study the impact of various hypothetical tunnel backfilling scenarios to provide recommendations for preservation and tunnel safety. The generated finite element models were analyzed under three water saturation levels to account for the impact of heavy rainy seasons and water infiltration on the stress levels of the tunnels. From the analyses, sixty-three highly stressed areas were identified among the current tunnel system, with most of them being close or directly underneath Rosalila. From the tested hypothetical backfilling scenarios, it was found that, backfilling excavated sections can improve or worsen these stress concentrations depending on the location of the tunnel within the system. Finally, by analyzing Rosalila’s current geometry, it was observed that the structure experiences high levels of stress on its southern side due to its location within Temple 16. From this, it was concluded that fixing exposed areas of Rosalila that were affected by excavation on its southern side can significantly alleviate the existing deterioration and improve the stress flow in these areas. Advisors: Christine E. Wittich & Richard L. Wood