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• W2128680645 abstract "Under a weak perspective camera model, the image plane coordinates in different views of a planar object are related by an affine transformation. Because of this property, researchers have attempted to use affine invariants for recognition. However, there are two problems with this approach: (1) objects or object classes with inherent variability cannot be adequately treated using invariants; and (2) in practice the calculated affine invariants can be quite sensitive to errors in the image plane measurements. In this paper we use probability distributions to address both of these difficulties. Under the assumption that the feature positions of a planar object can be modeled using a jointly Gaussian density, we have derived the joint density over the corresponding set of affine coordinates. Even when the assumptions of a planar object and a weak perspective camera model do not strictly hold, the results are useful because deviations from the ideal can be treated as deformability in the underlying object model." @default.
• W2128680645 created "2016-06-24" @default.
• W2128680645 creator A5026825380 @default.
• W2128680645 creator A5037832356 @default.
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• W2128680645 date "2002-11-27" @default.
• W2128680645 modified "2023-09-26" @default.
• W2128680645 title "Probabilistic affine invariants for recognition" @default.
• W2128680645 cites W1503134807 @default.
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• W2128680645 doi "https://doi.org/10.1109/cvpr.1998.698677" @default.
• W2128680645 hasPublicationYear "2002" @default.
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