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- W2004813452 abstract "One of the aims of computer vision in the past 30 years has been to recognize shapes by numerical algorithms. Now, what are the geometric features on which shape recognition can be based? In this paper, we review the mathematical arguments leading to a unique definition of planar shape elements. This definition is derived from the invariance requirement to not less than five classes of perturbations, namely noise, affine distortion, contrast changes, occlusion, and background. This leads to a single possibility: shape elements as the normalized, affine smoothed pieces of level lines of the image. As a main possible application, we show the existence of a generic image comparison technique able to find all shape elements common to two images." @default.
- W2004813452 created "2016-06-24" @default.
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- W2004813452 date "2003-01-01" @default.
- W2004813452 modified "2023-10-01" @default.
- W2004813452 title "On the Theory of Planar Shape" @default.
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- W2004813452 doi "https://doi.org/10.1137/s1540345902410846" @default.
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