Global optimization-based three-dimensional model synthesis method

A technology of 3D model and synthesis method, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as not being able to truly support model reuse, and achieve the effect of maintaining continuity and good continuity

Inactive Publication Date: 2013-08-14
NANJING UNIV
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Problems solved by technology

3D model retrieval technology is the basis for resource reuse, but it only supports the problem of model acquisition from a large number of resources, and cannot really support model reuse
However, this type of method still faces two major problems: how to establish an effective model

Method used

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  • Global optimization-based three-dimensional model synthesis method
  • Global optimization-based three-dimensional model synthesis method
  • Global optimization-based three-dimensional model synthesis method

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Embodiment

[0051] Each step of the present invention is described below according to an embodiment.

[0052] In step (1), the sample three-dimensional model is divided into a synthesis part and a scaling part according to the sample three-dimensional model and attribute identification input by the user.

[0053] right Figure 3a As shown in the three-dimensional model of the input sample, this embodiment defines two types of attributes: a part Y that needs to be synthesized and a part S that only needs to be scaled. After the attribute identification is done, only the Y part is processed, and the part S that only needs to be scaled does not participate in the synthesis of the global optimization model, and only simple scaling is combined with the synthesis result of the Y mark synthesis part. User attribute identification results such as Figure 3b shown.

[0054] Step (2), perform structural segmentation on the synthesized part to obtain different types of spatial blocks of the synth...

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Abstract

The invention relates to a model synthesis method, in particular to a global optimization-based three-dimensional model synthesis method, which utilizes the structural information of a three-dimensional model sample and a global optimization algorithm to synthesize various target three-dimensional models similar to the initial model. The method first utilizes a model structure analysis method to split the three-dimensional model sample and obtain the class number of each spatial block, then establishes a global model synthesis energy equation on the basis of the constraint relation between the class numbers obtained from the three-dimensional model sample, and adopts an expectation maximization algorithm for iterative optimization to work out a global energy minimum, and the final result is a synthesized model. The method can effectively keep the continuity of target three-dimensional model structures and the integrity of the visual effect.

Description

technical field [0001] The invention relates to the technical fields of computer image processing and computer graphics, in particular to a three-dimensional model synthesis method based on global optimization. Background technique [0002] As a new generation of digital media, digital geometric models have been widely used in many fields such as industrial manufacturing, digital entertainment, biomedicine, and digital cultural heritage protection. With the emergence of a large number of shareable digital geometric models, how to realize the effective reuse of existing model resources has become one of the important issues faced by this field. 3D model retrieval technology is the basis of resource reuse, but it only supports the problem of model acquisition from a large number of resources, and cannot really support model reuse. The instance modeling technology combines digital geometry processing technologies such as model feature analysis, model retrieval and grid editing...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06T19/00
Inventor 张岩文艳孙正兴宋沫飞
Owner NANJING UNIV
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