Projective and illumination invariant representation of disjoint shapes
نویسندگان
چکیده
منابع مشابه
Projective and Illumination Invariant Representation of Disjoint Shapes
We describe a new projectively invariant representation of disjoint contour groups which is suitable for shape-based retrieval from an image database. It consists of simultaneous polar reparametrization of multiple curves where an invariant point is used as the origin. For each ray orientation, a cross-ratio of its intersections with other curves is taken as a value associated to the radius. Wi...
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متن کاملArticulation-Invariant Representation of Non-planar Shapes - Supplementary material
14. Related to our representation: 15. R̃ the shape representation we are interested in (Equation 1) 16. D the distance that is preserved under non-planar articulations, upto a data-dependent error (Equation 2) 17. 2? error terms (Equation 5) 18. T the transformation to perform part-wise affine normalization 19. hlk histogram of a point ul ∈ Sk; R̃ is built from this (Equation 10) 20. z number of...
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ژورنال
عنوان ژورنال: Image and Vision Computing
سال: 1998
ISSN: 0262-8856
DOI: 10.1016/s0262-8856(98)00073-0