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Automatic obtaining method of three-dimensional scene optimal view angle based on maximized visual information

A 3D scene, automatic acquisition technology, applied in 3D image processing, image data processing, instruments, etc., can solve the problems of single 3D model and transplanting 3D scene.

Inactive Publication Date: 2012-11-28
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] However, a 3D model usually contains only a single object, while a 3D scene usually contains a large number of objects, and presents different shapes and materials, which makes the traditional method for the best viewing angle of a 3D model not well transplanted. to the best view of the 3D scene

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  • Automatic obtaining method of three-dimensional scene optimal view angle based on maximized visual information
  • Automatic obtaining method of three-dimensional scene optimal view angle based on maximized visual information
  • Automatic obtaining method of three-dimensional scene optimal view angle based on maximized visual information

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Embodiment Construction

[0059] The present invention will be described in detail below with reference to the accompanying drawings.

[0060] figure 1 is a flowchart of the present invention. The present invention is mainly divided into eleven steps:

[0061] see figure 1 , 2 :

[0062] Step 1: For a given 3D scene S, determine its upward direction, which is defined as the positive direction. And normalize the 3D scene with respect to the determined positive direction to obtain a normalized 3D scene M;

[0063] Step 2: For the normalized 3D scene M, perform uniform sampling on the upper hemisphere of the unit sphere surrounding M to obtain a sampling viewpoint set V. For different sampling viewpoints, because they carry the geometric feature information of different directions of the 3D scene M, their visual effects may present completely different forms of expression ( image 3 ).

[0064] Step 3: For a given 3D model, the geometric feature information of its surface is mainly reflected in th...

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Abstract

The invention provides an automatic obtaining method of a three-dimensional scene optimal view angle based on maximized visual information. The surface geometrical characteristic of a scene is represented through utilizing the curvature of all vertices of the three-dimensional scene, and the characteristic area of the three-dimensional scene is solved through utilizing a self-adaptive clustering method. As for each sampling view point, the visual characteristic total amount and the visual display effect on all characteristic areas are estimated, and the optimal view angle for observing the three-dimensional scene is found out finally on the basis of a clustering algorithm and a statistical method. In the method, the surface geometrical characteristic information of the given three-dimensional scene is fully utilized, the visual quality of each characteristic area is taken into consideration when the maximized visual information amount is obtained, the optimal view angle is solved, andthe visual demand for people to observe the three-dimensional scene is fully met.

Description

technical field [0001] The invention relates to a computer three-dimensional model processing method, in particular to a method for automatically acquiring the best viewing angle of a three-dimensional scene based on maximizing visual information. Background technique [0002] In recent years, with the rapid development of computer technology and network technology, more and more 3D scene models are used in environmental navigation, virtual reality, digital city and other fields. [0003] Given a 3D model, when it is observed from different angles, different viewing angles carry visual information from different directions of the 3D model, which may show completely different representations. The essence of finding the best viewing angle is to find a viewpoint that carries the largest amount of information, which is conducive to people's deeper observation and understanding of a given 3D model. In recent years, the optimal viewing angle problem has been extensively studied i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/00
Inventor 黄华张磊刘洪
Owner XI AN JIAOTONG UNIV
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