Abstract
Image and geometry processing applications estimate the local geometry of objects using information localized at points. They usually consider information about the tangents as a side product of the points coordinates. This work proposes parabolic polygons as a model for discrete curves, which intrinsically combines points and tangents. This model is naturally affine invariant, which makes it particularly adapted to computer vision applications. As a direct application of this affine invariance, this paper introduces an affine curvature estimator that has a great potential to improve computer vision tasks such as matching and registering. As a proof-of-concept, this work also proposes an affine invariant curve reconstruction from point and tangent data.
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Craizer, M., Lewiner, T. & Morvan, JM. Combining Points and Tangents into Parabolic Polygons. J Math Imaging Vis 29, 131–140 (2007). https://doi.org/10.1007/s10851-007-0037-2
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DOI: https://doi.org/10.1007/s10851-007-0037-2