Multi-resolution modeling method for three dimensional model of complex building

A three-dimensional model and multi-resolution technology, applied in the field of geospatial information systems, can solve problems such as weak simplification ability, loss of smooth group information in the model, and unfavorable visualization of virtual scenes, so as to improve the degree of automation and efficiency, ensure visual continuity, The effect of high execution efficiency
CN101655993AInactive Publication Date: 2010-02-24NANJING BAOYAN AUTOMATION
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING BAOYAN AUTOMATION
Publication Date
2010-02-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a multi-resolution modeling method for three dimensional model of complex building, comprising the steps of: building corresponding semi-side data structure with meaning information in a memory at same time of opening the three dimensional model of the building; calculating viewpoint spherical surface when the building three dimensional model is maximized to screen space by testing minimum bounding ball of the dimensional model of the building; acquiring viewpoint sampling position, and rendering the dimensional model of the building to obtain initial rendering image;executing HVS filter based on two dimension wavelet decomposition to the initial rendering image, and acquiring sensed image through wavelet coefficient reconstruction; calculating difference image according to the initial rendering image and the sensed image, dividing the pixels with changed gray scale in the difference image to obtain sensing information; finding out triangles corresponding to pixels with the changed gray scale on surface of the dimensional model of the building, simultaneously transmitting the corresponding sensing information to the triangles; simplifying the model according to the sensing information of the triangles.
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Description

technical field

[0001] The invention belongs to the technical field of geographic space information systems, in particular to a multi-resolution modeling method for three-dimensional models of complex buildings. Background technique

[0002] With the rapid development of various measurement technologies, the accuracy of data acquisition has been rapidly improved, especially the wide application of laser scanning technology or CAD technology, making it easier to obtain high-precision building models, which are often Contains a more complex internal structure and highly detailed appearance, therefore, the complex building model mainly refers to the use of laser scanning or CAD technology to obtain and create a highly detailed appearance and complex internal structure, the model has a highly complex internal structure 3D building models with topological relationships and complex semantic relationships between components. A complex building model is characterized by a number of...

Claims

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