https://pure.aber.ac.uk/portal/files/4916016/Westoby_et_al._GEOMORPH_2012_Accepted.pdf

‘Structure-from-Motion’ photogrammetry: A low-cost, effective tool for geoscience applications

We describe a hardware and software system for digitizing the shape and color of large fragile objects under non-laboratory conditions Our system employs laser triangulation rangefinders, laser time-of-flight rangefinders, digital still cameras, and a suite of software for acquiring, aligning, merging, and viewing scanned data As a demonstration of this system, we digitized 10 statues by Michelangelo, including the well-known figure of David, two building interiors, and all 1,163 extant fragments of the Forma Urbis Romae, a giant marble map of ancient Rome Our largest single dataset is of the David - 2 billion polygons and 7,000 color images In this paper, we discuss the challenges we faced in building this system, the solutions we employed, and the lessons we learned We focus in particular on the unusual design of our laser triangulation scanner and on the algorithms and software we developed for handling very large scanned models

/pdf/the-digital-michelangelo-project-3d-scanning-of-large-36ear7sqje.pdf

The digital Michelangelo project: 3D scanning of large statues

This article provides a comprehensive introduction into the field of robotic mapping, with a focus on indoor mapping. It describes and compares various probabilistic techniques, as they are presently being applied to a vast array of mobile robot mapping problems. The history of robotic mapping is also detailed, along with an extensive list of open research problems.

/pdf/robotic-mapping-a-survey-4m18o2pjhn.pdf

Robotic mapping: a survey

https://publikationen.bibliothek.kit.edu/1000039918/3024499

Building Information Modeling (BIM) for existing buildings — Literature review and future needs

An image guided catheter navigation system for navigating a region of a patient includes an imaging device, a tracking device, a controller, and a display. The imaging device generates images of the region of the patient. The tracking device tracks the location of the catheter in the region of the patient. The controller superimposes an icon representing the catheter onto the images generated from the imaging device based upon the location of the catheter. The display displays the image of the region with the catheter superimposed onto the image at the current location of the catheter.

Navigation system for cardiac therapies

Archaeology is emerging as one of the key areas of applications for laser range imaging. This particular context imposes a number of specific constraints on the design and operations of range sensors. In this paper, we discuss some of the issues in designing and using laser range sensor systems for archaeology. Results obtained on remote archaeological sites will serve to illustrate these considerations.

/pdf/laser-range-imaging-in-archaeology-issues-and-results-2ar04kec7t.pdf

Laser range imaging in archaeology: issues and results

Applications such as dimensional inspection, positioning and tracking of objects, and reverse engineering require highly accurate measurement systems. A vision-based coordinate measurement system (VCM) developed at the National Research Council of Canada, targeted for these applications, will be described. In order for a vision system to be considered for such applications, its performance and design parameters must be well understood. Therefore, a performance evaluation procedure and accuracy analysis, along with test results, will also be presented.© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Application and performance evaluation of a vision-based automated measurement system

The National Research Council of Canada (NRC) has developed a range of 3D imaging technology tools, which have been applied to a wide range of museum and heritage recording applications. The technology suite includes the development of high-resolution laser scanner systems as well as software for the preparation of accurate 3D models and for the display, analysis and comparison of 3D data. This paper will offer an overview of the technology and its museum and heritage applications with particular reference to the 3D examination of paintings and recording of archaeological sites.

NRC's 3D technology for museum and heritage applications

The digital documentation of monuments and architectures is an important field of application of the 3D modeling where both visual quality and precise 3D measurement are important. This paper proposes an integrated approach based upon the combination of different 3D modeling techniques for the virtual reconstruction of complex architectures like those found in medieval castles. The need of combining multiple techniques, like terrestrial laser scanning, photogrammetry and digital surveying comes from the complexity of some structures and by the lack of a single technique capable of giving satisfactory results in all measuring conditions. This paper will address modeling issues related to the automation of photogrammetric methods and to the fusion of 3D models acquired with different techniques, at different point densities and measurement accuracies. The test bench is a medieval castle placed in Trentino A.A., a tiny region in Northern Italy.

Digital documentation of complex architectures by integration of multiple techniques: the case study of Valer Castle

Due to the nature of many applications, it is difficult with present technology to use a single type of sensor to automatically, accurately, reliably, and completely measure or map, in 3D, objects, sites, or scenes. Therefore, a combination of various sensor technologies is usually the obvious solution. There are several 3D technologies, two of which; digital photogrammetry and triangulation laser scanning, are dealt with in this paper. The final accuracy achieved by the combination of various sensors is a factor of many sensor parameters and the quality of the image coordinate measurements of each sensor. The effect of those parameters must be determined to maximize the overall quality within the constraints imposed by the requirements of the application. The parameters affecting the accuracy of measurement, the test laboratory, and test results using intensity and range data, are presented. The configuration design of intensity and range sensors is discussed based on the results presented here and in two previous papers.

Sabry F. El-Hakim

Papers

Laser range imaging in archaeology: issues and results

Application and performance evaluation of a vision-based automated measurement system

NRC's 3D technology for museum and heritage applications

Digital documentation of complex architectures by integration of multiple techniques: the case study of Valer Castle

Configuration design for sensor integration