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16 results on '"Henderson, Jon C."'

6. High-resolution underwater robotic vision-based mapping and three-dimensional reconstruction for archaeology

Author

Johnson-Roberson, Matthew, Bryson, Mitch, Friedman, Ariell, Pizarro, Oscar, Troni, Giancarlo, Ozog, Paul, and Henderson, Jon C.

Abstract

Documenting underwater archaeological sites is an extremely challenging problem. Sites covering large areas are particularly daunting for traditional techniques. In this paper, we present a novel approach to this problem using both an autonomous underwater vehicle (AUV) and a diver-controlled stereo imaging platform to document the submerged Bronze Age city at Pavlopetri, Greece. The result is a three-dimensional (3D) reconstruction covering 26,600 m2 at a resolution of 2 mm/pixel, the largest-scale underwater optical 3D map, at such a resolution, in the world to date. We discuss the advances necessary to achieve this result, including i) an approach to color correct large numbers of images at varying altitudes and over varying bottom types; ii) a large-scale bundle adjustment framework that is capable of handling upward of 400,000 stereo images; and iii) a novel approach to the registration and rapid documentation of an underwater excavations area that can quickly produce maps of site change. We present visual and quantitative comparisons to the authors' previous underwater mapping approaches.

Published
2016

8. Christina Fredengren. Crannogs: a study of peoples interaction with lakes, with particular reference to Lough Gara in the north-west of Ireland

Author

Henderson, Jon C.

Subjects
Crannogs: a Study of Peoples Interaction with Lakes, With Particular Reference to Lough Gara in the North-west of Ireland. (Book) -- Fredengren, Christina, Books -- Book reviews, Anthropology/archeology/folklore
Abstract

xi+332 pages, 74 b&w & colour figures, colour plates, 8 tables; CD-ROM. 2002. Bray: Wordwell; 1-869857-56-9 paperback 25 €. Whereas most studies acknowledge the wide chronological range of crannogs, due [...]

Published
2003

9. High-Resolution Underwater Robotic Vision-Based Mapping and Three-Dimensional Reconstruction for Archaeology.

Author

Johnson‐Roberson, Matthew, Bryson, Mitch, Friedman, Ariell, Pizarro, Oscar, Troni, Giancarlo, Ozog, Paul, and Henderson, Jon C.

Subjects
UNDERWATER archaeology, AUTONOMOUS vehicles, ARCHAEOLOGICAL excavations, SUBMERSIBLES, ROBOTICS
Abstract

Documenting underwater archaeological sites is an extremely challenging problem. Sites covering large areas are particularly daunting for traditional techniques. In this paper, we present a novel approach to this problem using both an autonomous underwater vehicle (AUV) and a diver-controlled stereo imaging platform to document the submerged Bronze Age city at Pavlopetri, Greece. The result is a three-dimensional (3D) reconstruction covering 26,600 m2 at a resolution of 2 mm/pixel, the largest-scale underwater optical 3D map, at such a resolution, in the world to date. We discuss the advances necessary to achieve this result, including i) an approach to color correct large numbers of images at varying altitudes and over varying bottom types; ii) a large-scale bundle adjustment framework that is capable of handling upward of 400,000 stereo images; and iii) a novel approach to the registration and rapid documentation of an underwater excavations area that can quickly produce maps of site change. We present visual and quantitative comparisons to the authors' previous underwater mapping approaches. [ABSTRACT FROM AUTHOR]

Published
2017
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