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- David B. Cooper, Andrew R. Willis, +13 authors David Mumford
- Virtual Reality, Archeology, and Cultural…
- 2001

A heretofore unsolved problem of great archaeological importance is the automatic assembly of pots made on a wheel from the hundreds (or thousands) of sherds found at an excavation site. An approach is presented to the automatic estimation of mathematical models of such pots from 3D measurements of sherds. The overall approach is formulated and described… (More)

- Andrew R. Willis, David B. Cooper
- Proceedings of the 2004 IEEE Computer Society…
- 2004

We present a complete system for the purpose of automatically assembling 3D pots given 3D measurements of their fragments commonly called sherds. A Bayesian approach is formulated which, at present, models the data given a set of sherd geometric parameters. Dense sherd measurement data is obtained by scanning the outside surface of each sherd with a laser… (More)

- Andrew R. Willis, Xavier Orriols, David B. Cooper
- 2003 Conference on Computer Vision and Pattern…
- 2003

This paper deals with the problem of precise automatic estimation of the surface geometry of pot sherds uncovered at archaeological excavation sites using dense 3D laser-scan data. Critical to ceramic fragment analysis is the ability to geometrically classify excavated sherds, and, if possible, reconstruct the original pots using the sherd fragments. To do… (More)

- David B. Cooper, Andrew R. Willis, +13 authors David Mumford
- ICPR
- 2002

A heretofore unsolved problem of great archaeological importance is the automatic assembly of pots made on a wheel from the hundreds (or thousands) of sherds found at an excavation site. An approach is presented to the automatic estimation of mathematical models of such pots from 3D measurements of sherds. A Bayesian approach is formulated beginning with a… (More)

- Andrew R. Willis
- 2004

friends, co-workers, and especially my fiancé Julianna, has made the completion of this work a reality. The pottery assembly system reflects discussions with a diverse group of people from several disciplines including Applied Math : Some programming and significant creative input was provided by Jasper Speicher with regard to the interface design of the… (More)

A system for the semi-automatic reconstruction of highly fragmented bone fractures, developed to aid in treatment planning, is presented. The system aligns bone fragment surfaces derived from segmentation of volumetric CT scan data. Each fragment surface is partitioned into intact-and fracture-surfaces, corresponding more or less to cortical and cancellous… (More)

- Andrew R. Willis, David B. Cooper
- Third International Symposium on 3D Data…
- 2006

In this paper, we present a computationally efficient technique for solving the difficult problem of estimating the global shape of a ceramic pot from measurements of its fragments. Each unknown pot is modeled as a surface of revolution, i.e., a 3D line- the central axis of the pot- and a 2D profile curve with respect to that axis. For each fragment, a… (More)

- Andrew R. Willis, Jasper Speicher, David B. Cooper
- ICPR
- 2004

This paper introduces a new stochastic surface model for deformable 3D surfaces and demonstrates its utility for the purpose of 3D sculpting. This is the problem of simple-to-use and intuitively interactive 3D free-form model building. A 3D surface is a sample of a Markov Random Field (MRF) defined on the vertices of a 3D mesh where MRF sites coincide with… (More)

- Andrew R. Willis, Malcolm J. Zapata, James M. Conrad
- 2009 IEEE International Symposium on Modeling…
- 2009

This article describes a multimedia system consisting of two sensors: (1) a laser range scanner (LIDAR) and (2) a conventional digital camera. Our work specifies a mathematical calibration model that allows for this data to be explicitly integrated. Data integration is accomplished by calibrating the system, i.e., estimating for each variable of the model… (More)

- Andrew R. Willis, David B. Cooper
- ICPR
- 2004

Uknown to us, an axially-symmetric surface is broken into disjoint pieces along a set of break-curves, i.e., the curves along which the surface locally breaks into two pieces. A subset of the pieces are available and for each of them we obtain noisy 3D measurements of its surface and break-curves. Using the piece measurements and knowledge of which pieces… (More)