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Method for extracting multi-dimension curvature characteristic on triangle gridding

A triangular grid and feature extraction technology, applied in image data processing, measurement devices, 3D modeling, etc., can solve problems such as unsatisfactory feature extraction, insufficient model understanding, and no clear division of detailed features and coarse-grained features.

Active Publication Date: 2009-10-21
TSINGHUA UNIV
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Problems solved by technology

[0003] The technical problem to be solved in the present invention is that in the prior art, the analysis of the curvature characteristics of the network model does not consider the scale characteristics of the curvature information, and there is no clear division of the detailed features and the coarse-grained features, resulting in an insufficient understanding of the model. Unsatisfactory result extraction and many other deficiencies, in order to overcome these deficiencies, it is necessary to seek a new analysis method, the purpose of the present invention is to provide a multi-scale curvature feature extraction method on a triangular grid

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  • Method for extracting multi-dimension curvature characteristic on triangle gridding
  • Method for extracting multi-dimension curvature characteristic on triangle gridding
  • Method for extracting multi-dimension curvature characteristic on triangle gridding

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[0025] refer to figure 1 , represents the flow chart of the extraction method of the present invention. The input data is a triangular mesh of arbitrary topology to be analyzed. The present invention first adopts the method of adjacent principal component analysis, a multi-scale grid curvature information estimation, a1 uses spherical function and its derivative function and grid characteristic function to do convolution; a2 obtains the principal component through principal component analysis and reverses Find the principal curvature; a3 calculate the Gaussian curvature information based on the multi-scale principal curvature; b construct a grid feature descriptor set that satisfies the local quadratic surface constraint through the constraint form of the Gaussian curvature on the quadric surface, and b1 divide the grid vertices according to The Gaussian curvature is sorted from large to small; b2 constructs a local frame according to its curvature direction and normal direct...

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Abstract

A multiple-dimensioned curvature feature extraction method of a trigonal grid belongs to the digital media technology field. The method comprises steps of: a, multiple-dimensioned grid point main curvature information estimation; b, local grid curvature geometrical description symbol creation under special dimensioned; c, grid curvature feature extraction under the special dimensioned. The method can ideally extract the geometrical information containing curvature feature of a grid model under the special dimensioned by analyzing the adjacent domain main component and estimating the multiple-dimensioned grid point main curvature information on the grid.

Description

technical field [0001] The invention belongs to the technical field of digital media, and in particular relates to a method for extracting multi-scale curvature features on triangular grids in the intelligent processing of visual media. Background technique [0002] In digital media, triangulated meshes are one of the most common formats for digital representation of three-dimensional geometry. Thanks to the advancement of 3D data acquisition methods such as 3D laser measurement technology, following digital audio in the 1970s, digital images in the 1980s, and digital video in the 1990s, since the beginning of this century, digital geometry has become a new The emergence of digital media has been increasingly widely used. Compared with the traditional modeling using CAD technology, the use of 3D acquisition technology can quickly obtain high-quality 3D geometric data, and does not require operators to have advanced professional knowledge and complex operations, which greatl...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00G01B11/00
Inventor 胡事民杨永亮
Owner TSINGHUA UNIV