发明名称 |
Device for processing three-dimensional image information, with extraction of significant lines |
摘要 |
An image is defined, in correspondence with a predetermined polyhedral meshing of a portion of the space, by a numerical value for each vertex of the meshing. Polygon processing includes receiving a representation of a plane polygon with p vertices, p respective values for these p vertices, and a threshold. In correspondence with the polygon, polygon processing supplies a list of oriented segments linking points of the edges of the polygon which are interpolated as being equal to the threshold, with a predetermined direction convention. Polyhedron processing includes receiving a representation of a polyhedron with the values at its vertices and a threshold. Polyhedron processing then invokes polygon processing for all the faces of the polyhedron, which supplies a list of oriented segments. Polyhedron processing then associates with the polyhedron a list of closed and oriented cycles, constituted by segments from the said list of segments. Main processing includes sequentially presenting a plurality of polyhedrons of the polyhedrons meshing for the polyhedron processing, with the values associated with their vertices and a threshold. The cycles thus obtained belong to an iso-surface of the image for the threshold value.
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申请公布号 |
US5499322(A) |
申请公布日期 |
1996.03.12 |
申请号 |
US19930040292 |
申请日期 |
1993.03.30 |
申请人 |
INRIA INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE |
发明人 |
THIRION, JEAN-PHILIPPE;AYACHE, NICHOLAS;MONGA, OLIVIER;GOURDON, ALEXIS |
分类号 |
G06T1/00;G06T5/00;G06T15/00;(IPC1-7):G06T17/40 |
主分类号 |
G06T1/00 |
代理机构 |
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代理人 |
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主权项 |
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