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DTIC ADA190387: Non-Rigid Motion and Regge Calculus. |
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by Defense Technical Information Center |
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This document studies the problem of recovering the |
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structure from motion of figures which are allowed to |
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perform a controlled non-rigid motion. The authors use |
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Regge Calculus to approximate a general surface by a net |
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of triangles. The non-rigid flexing motion they deal with |
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corresponds to keeping the triangles rigid and allowing |
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bending only at the joins between triangles. Such motion |
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has been studied by Koenderink and van Doorn (1986). It |
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is shown that this motion keeps the Gaussian curvature of |
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the surface constant but changes the principal |
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curvatures. The authors show that depth information of |
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the vertices of the triangles can be obtained by using a |
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modified version of the Incremental Rigidity Scheme |
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devised by Ullman (1984). In cases where the motion of |
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the figure displays fundamentally different views at each |
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frame presentation the algorithm works well, not only for |
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strictly rigid motion (Ullman 1984, Grzwacz and Hildreth |
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1985) but also for a limited amount of bending |
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deformation. This scheme is modified to allow for flexing |
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motion (in the sense defined above)l this version is |
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called the Incremental Semirigidity Scheme. Keywords: |
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Rigidity; Computations. |
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Date Published: 2018-02-17 15:24:14 |
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Identifier: DTIC_ADA190387 |
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Item Size: 22269175 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Jasinschi, R ; MASSACHU... |
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