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Images and Artefacts of the Ancient World$
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Alan K. Bowman and Michael Brady

Print publication date: 2005

Print ISBN-13: 9780197262962

Published to British Academy Scholarship Online: January 2012

DOI: 10.5871/bacad/9780197262962.001.0001

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Automatic Creation of Virtual Artefacts from Video Sequences

Automatic Creation of Virtual Artefacts from Video Sequences

(p.59) Chapter 6 Automatic Creation of Virtual Artefacts from Video Sequences
Images and Artefacts of the Ancient World

Andrew W. Fitzgibbon

Geoff Cross

Andrew Zisserman

British Academy

Digital representation of an artefact is necessary in order to measure, admire and analyse such ancient pieces. For the purpose of storing, recoding and transmitting information, digital photographs may be enough. However, in the examination purposes of an artefact, a 3D presentation is invaluable as it allows the object viewpoint to be modified freely and 3D measurements to be taken on object features. This chapter describes the system by which 3D models from photographs can be acquired, without the need for the calibration of system geometry such as the camera focal length, relative motion of the camera and object, and the relative positions of the camera and object. This system instead computes the representation of all possible objects and camera configurations which are consistent with the given image. The first section discusses how tracking points observed in 2D images allows for the computation of the relative camera and object geometry. The second section discusses the construction of a triangulated 3D model from the object projections. The third section discusses the refinement of the model based on surface texture.

Keywords:   digital representation, digital photographs, 3D presentation, 3D models from photographs, camera configurations, 2D images, object geometry, triangulated 3D model, object projections, surface texture

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