A three-dimensional model retrieval method used for mixed contour line views

A three-dimensional model, contour line technology, applied in other database retrieval, character and pattern recognition, special data processing applications, etc., can solve the problem of retrieval input source limitation, etc., to achieve the effect of high content similarity and excellent retrieval performance

Active Publication Date: 2016-10-12
ZHEJIANG UNIV OF TECH
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Problems solved by technology

Resolved bug with retrieving input source limits

Method used

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  • A three-dimensional model retrieval method used for mixed contour line views
  • A three-dimensional model retrieval method used for mixed contour line views
  • A three-dimensional model retrieval method used for mixed contour line views

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Embodiment

[0049] Example: such as figure 1 As shown in , a method for retrieval of 3D models in hybrid contour view is as follows:

[0050] Based on the optimal viewpoint method, the models in the 3D model library are extracted one by one to obtain a better viewpoint set;

[0051]The viewpoint evaluation information based on which the optimal viewpoint is extracted mainly includes: projected area, visible area ratio, surface area entropy, curvature entropy, contour length, contour entropy, grid saliency, etc. The present invention fuses optimal viewpoints with complementary properties to a certain extent. The viewpoint evaluation information is used as a viewpoint information feature to represent a model-specific viewpoint. Optimal viewpoint set extraction mainly includes two parts: training and extraction, such as figure 2 Shown:

[0052] 1) In the training process, it is first necessary to obtain relevant data of human viewing habits for machine learning. In order to facilitate c...

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Abstract

The invention relates to a three-dimensional model retrieval method used for mixed contour line views. The method comprises the steps of extracting algorithm training based on an optimal viewpoint and obtaining a three-dimensional model preferable viewpoint set; rendering three-dimensional model mixed contour line views under the preferable viewpoint set, extracting Gabor edge response features for the mixed contour line views of the viewpoints and establishing a feature library; extracting the same edge response features for input natural images, retrieving similar models from the feature library by using the visual word bag method, and performing ordering according to the similarity degrees. Experimental results show that the method realizes three-dimensional model retrieval through the edge similarity of natural images and model feature line views, reduces the interference of degradation views and the texture of natural images on the three-dimensional model retrieval, accords with the mechanism of three-dimensional body identification of human vision, and achieves a good retrieval effect.

Description

technical field [0001] The invention relates to the field of computer graphics, in particular to a method for retrieving three-dimensional models under mixed contour view. Background technique [0002] With the enhancement of computer computing and graphics performance, as well as the demands of industrial design, virtual reality, film and television animation, 3D printing, video games, education and other fields, 3D models are becoming more and more frequent in daily expression. The scale of 3D models continues to expand, which stimulates a series of technical requirements for analysis and matching of 3D models, as well as retrieval and extraction of 3D model libraries. In the related methods of 3D model retrieval, there are many types of models, and most of the models have problems such as difficult definition of individuals, homomorphic and heterogeneous, and unclear function definition. In addition, the cultural background of the definer in the definition of semantic tag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06K9/62
CPCG06F16/903G06F18/23213G06F18/214
Inventor 刘志尹世超潘翔
Owner ZHEJIANG UNIV OF TECH
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