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An Automated Simplification Method for 3D Models Based on Importance Sampling

A technology of importance sampling and 3D modeling, applied in 3D modeling, image data processing, special data processing applications, etc., can solve problems such as folds, sharp corners, chisel marks, and boundary simplification that cannot be modeled

Inactive Publication Date: 2016-05-11
SHANDONG NORMAL UNIV
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Problems solved by technology

The traditional 3D model simplification method cannot effectively simplify the features of the model such as folds, sharp corners, chisel marks, and boundaries

Method used

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  • An Automated Simplification Method for 3D Models Based on Importance Sampling
  • An Automated Simplification Method for 3D Models Based on Importance Sampling
  • An Automated Simplification Method for 3D Models Based on Importance Sampling

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Embodiment Construction

[0048] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0049] The automatic simplification method of 3D model based on importance sampling mainly includes the following processes:

[0050] Process 1: Import of 3D model.

[0051] Process 2: Define the important geometric features of the 3D model.

[0052]Important geometric features refer to feature areas with large curvature changes such as folds, sharp corners, gouges, and boundaries. These areas are geometric features that people's visual system is more sensitive to.

[0053] The importance of the 3D model. The quantitative function of the geometric features is defined as the set of extreme points along the main direction of the main curvature of the surface of the 3D model.

[0054] Process 3: Convert the surface of the 3D model into an implicit surface function.

[0055] Step 1: The implicit function converted from the surface of the 3D model is defined as...

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Abstract

The invention discloses a three-dimensional model automation simplification method based on importance sampling. The three-dimensional model automation simplification method based on importance sampling comprises the following steps that importance geometrical characteristics of a three-dimensional model are defined, the importance geometrical characteristics of the three-dimensional model are automatically extracted, and expression and recovery of the simplified three-dimensional model are carried out. According to the three-dimensional model automation simplification method, through the extreme point of the surface principal curvature of the three-dimensional model in the principal direction, effective quantization is carried out on the importance geometrical characteristics such as drapes, sharp corners, chisel marks and boundaries. For the area with the importance geometrical characteristics, a larger sampling probability is used for obtaining sampling points; while for the other areas, a smaller sampling probability is used for obtaining the sampling points. Therefore, a sampling point set in the simplified model can largely reduce the number of vertices of a mesh model on the foundation that the geometrical characteristics such as drapes, sharp corners, chisel marks and boundaries are effectively kept. The three-dimensional model automation simplification method based on importance sampling has the advantages of being high in simplification degree, good in model accuracy, efficient in simplification process and the like.

Description

technical field [0001] The invention relates to a simplification method for a three-dimensional model, in particular to an automatic simplification method for a three-dimensional model based on importance sampling. Background technique [0002] 3D models are widely used in industrial manufacturing, architectural design, product display, medicine, e-commerce, military simulation, and film and television entertainment. As people's requirements for these aspects are getting higher and higher, 3D models are developing towards a more realistic and more complex direction. The more realistic and complex 3D model has led to a sharp increase in the number of triangles and an increasing amount of data, which far exceeds the interactive processing of graphics hardware and the ability of real-time network transmission. Therefore, how to simplify the 3D model while maintaining the characteristics of the original model so as to realize the rapid processing of the complex model has become...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T17/00
Inventor 张桂娟陆佃杰刘弘
Owner SHANDONG NORMAL UNIV
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