منابع مشابه
Curved Crease Origami
Most origami, both practical and mathematical, uses just straight creases. Curved creases, on the other hand, offer a wealth of new design possibilities. While the first curved-crease models date back to the Bauhaus in the 1930s, curved creasing remains relatively underexplored. The principal challenge considered here is to understand what 3D forms result as natural resting state(s) after foldi...
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In this paper, we study a novel pattern in the fingerprint called crease, a kind of stripes irregularly crossing the normal fingerprint patterns (ridges and valleys). Creases will cause spurious minutiae by using conventional feature detection algorithm, and therefore decrease the recognition rate of fingerprint identification. By representing the crease using a parameterized rectangle, we desi...
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In this study, we extract 3D crease points on the surface of an object from its X-ray CT projection images (sinogram) without reconstructing the surface mesh. The idea behind this is that most of the 3D creases are captured as crease pixels in the 2D projection images, so the creases may be reconstructed from the 2D crease pixels. So we first extract the crease pixels in each of the 2D projecti...
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We consider the problem of multi-scale estimation of principal curvatures and crease lines on a surface represented with a mesh of triangles and affected by noise. We show that curvature at different scales can be efficiently and accurately estimated by modifying a fitting technique and applying it to neighborhoods of various size, depending on scale: we discard bending portions of surfaces dur...
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Modeling folding surfaces with nonzero thickness is of practical interest for mechanical engineering. There are many existing approaches that account for material thickness in folding applications. We propose a new systematic and broadly applicable algorithm to transform certain flat-foldable crease patterns into new crease patterns with similar folded structure but with a facet-separated folde...
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ژورنال
عنوان ژورنال: Oz
سال: 2001
ISSN: 2378-5853
DOI: 10.4148/2378-5853.1363