作者: Svetlana Lazebnik , Jean Ponce
DOI: 10.1007/S11263-005-4947-4
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摘要: This article examines projectively-invariant local geometric properties of smooth curves and surfaces. Oriented projective differential geometry is proposed as a general framework for establishing such invariants characterizing the shape surfaces their outlines. It applied to two problems: (1) generalization Koenderink's famous characterization convexities, concavities, inflections apparent contours solids bounded by surfaces, (2) image-based construction rim meshes, which provide combinatorial description arrangement induced on surface an object contour generators associated with multiple cameras observing it.