3D building model structure discovery method based on transformation space

A technology for building models and 3D models, which can be used in 3D modeling, image data processing, instruments, etc., and can solve problems such as difficulties in 3D models.

Active Publication Date: 2014-09-24
NANJING UNIV
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Problems solved by technology

It is difficult to directly apply the above image structure analysis method to the structure analysis of 3D models

Method used

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  • 3D building model structure discovery method based on transformation space
  • 3D building model structure discovery method based on transformation space
  • 3D building model structure discovery method based on transformation space

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Embodiment

[0047] Each step of the present invention is described below according to an embodiment.

[0048] Due to the particularity of the present invention, some of the drawings disclosed in the present invention have to be represented by drawings with grayscale effects.

[0049] In step (1), transformation analysis is performed on the sample building input by the user, and the initial 3D model space is transformed into a 2D translation transformation space.

[0050] Step (11) Preliminarily obtain the similarity set.

[0051] In this step, it is hoped to divide the set of points that may be similar in the input model, which is called the similarity set. The similarity set is a link between the three-dimensional model space and the translation transformation space. By pairing any two points in the similarity set to obtain the corresponding translation transformation, the input model space can be transformed into the translation transformation space obtained by the similarity set. The...

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Abstract

The invention relates to model structure analysis method. Firstly, an initial 3D model space is converted into a 2D translational transformation space through transformation analysis, thus a detection problem of inputting a rule structure is converted into a problem of firstly detecting a grid rule mode in a 2D space and secondly carrying out backstepping. For the grid rule mode detection problem in the 2D space, an energy minimization method is utilized to estimate the relevant parameters, a complete rule mode can be detected, and the method is also suitable for the condition with the existence of abnormal points or missing points. Finally the generation parameter of the corresponding rule structure on a 3D model is obtained through backstepping according to the grid rule mode, and the corresponding repeated construction unit is extracted. According to the method, the corresponding repeated construction unit of a translation repeat structure in a building model can be rapidly extracted.

Description

technical field [0001] The invention relates to a model structure analysis method, which belongs to the technical field of computer image processing and computer graphics, in particular to a three-dimensional building model structure discovery method based on transformation space. Background technique [0002] Various buildings can be seen everywhere around us, and it is not difficult to find that there are more or less regular structures in each building, such as windows with the same structure, or structural units such as doors in a certain area. In many cases, we rely on these repeated structural units to identify the design style of related buildings. Therefore, if some specific methods can be used to detect the repeated structure contained in the architectural model, it will be of great help to us to recognize and understand the existing architectural models. The most common detection methods for architectural model structural units mostly use manual interaction to ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
Inventor 文艳张岩孙正兴刘孜成
Owner NANJING UNIV
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