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University of Cambridge > Talks.cam > Machine Learning Journal Club > Journal Club: "A Bayesian Analysis of Projective Incidence"

## Journal Club: "A Bayesian Analysis of Projective Incidence"Add to your list(s) Download to your calendar using vCal - Piotr Zielinski
- Tuesday 22 August 2006, 11:00-12:00
- Room 911, Rutherford Building, Cavendish Laboratory, Department of Physics.
If you have a question about this talk, please contact Oliver Stegle. http://www.cs.cmu.edu/~rcollins/Pub/aicv93.html The theorems of projective geometry were developed with mathematically precise objects in mind. In contrast, a practical vision system must deal with errorful measurements extracted from real image sensors. A more robust form of projective geometry is needed, one that allows for possible imprecision in its geometric primitives. In this paper, uncertainty in projective elements is represented and manipulated using probability density functions in projective space. Projective n-space can be visualized using the surface of a unit sphere in (n+1)-dimensional Euclidean space. Each point in projective space is represented by antipodal points on the sphere. This two-to-one map from the unit sphere to projective space enables probability density functions on the sphere to be interpreted as probability density functions over the points of projective space. Standard constructions of projective geometry can then be augmented by statistical inferences on the sphere. In particular, a Bayesian analysis is presented for fusing multiple noisy observations related by known projective incidence relations. This talk is part of the Machine Learning Journal Club series. ## This talk is included in these lists:- Guy Emerson's list
- Inference Group Journal Clubs
- Inference Group Summary
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- Room 911, Rutherford Building, Cavendish Laboratory, Department of Physics
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