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Hierarchical construction method suitable for rapid visualization of massive three-dimensional live-action data

A construction method and three-dimensional technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problems of large amount of data at the top of the pyramid, inability to reconstruct texture images, and poor quality of texture images, so as to facilitate fast loading and Visualization, improved visualization quality, texture image high quality effects

Active Publication Date: 2020-04-17
宝略科技(浙江)有限公司
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Problems solved by technology

[0004] The traditional hierarchical construction method of 3D real scene data has the following problems: a) the number of layers is small, and the data volume at the top of the pyramid is large, which leads to a long time for the initial loading; b) the texture image quality is not good, and most of the simplification algorithms can generate Good model, but ineffective reconstruction of textured images

Method used

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  • Hierarchical construction method suitable for rapid visualization of massive three-dimensional live-action data
  • Hierarchical construction method suitable for rapid visualization of massive three-dimensional live-action data
  • Hierarchical construction method suitable for rapid visualization of massive three-dimensional live-action data

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Embodiment

[0049] A hierarchical construction method suitable for rapid visualization of massive 3D real scene data, which includes the following steps:

[0050] (1) Obtain an initial three-dimensional real-scene data, and cut the top-view plane of the three-dimensional real-scene data into regular rectangular blocks through a two-dimensional grid segmentation algorithm according to the position information of the top-view plane of the three-dimensional real-scene data;

[0051] (2) Use the texture forward projection algorithm based on depth detection to calculate the real orthographic image corresponding to the 3D real scene data of each block; use the triangulation network simplified algorithm to calculate the corresponding For different levels of 3D real scene data, during the simplification process, the texture coordinates of the vertices of the 3D real scene data do not change, and the vertices of the 3D real scene data have spatial position coordinates and texture coordinates;

[0...

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Abstract

A hierarchical construction method suitable for rapid visualization of massive three-dimensional live-action data is characterized by comprising the following steps: (1) segmenting an overlooking plane of the three-dimensional live-action data into regular rectangular blocks through a two-dimensional grid segmentation algorithm; (2) utilizing a texture orthographic projection algorithm based on depth detection to calculate a true radiograph corresponding to the three-dimensional live-action data of each block; calculating three-dimensional live-action data of different levels corresponding tothe three-dimensional live-action data of each block by using a triangulation network simplification algorithm; (3) optimizing the texture images of the three-dimensional live-action data of differentlevels of each block through a texture updating algorithm by taking the true radiograph corresponding to the three-dimensional live-action data of each block as a constraint; and calculating a topological relation of all the three-dimensional live-action data through a hierarchical reconstruction algorithm so as to construct a pyramid of the three-dimensional live-action data. According to the method, more hierarchies can be conveniently constructed, and the texture image quality is higher.

Description

technical field [0001] The invention relates to the technical field of geospatial data processing and application, in particular to a hierarchical construction method suitable for rapid visualization of massive three-dimensional real-scene data. Background technique [0002] The 3D real scene data has rich spatial information and high fidelity color reproduction. It not only records the basic size, area, geographical coordinates and other information of the city, but also records the pattern of the entire city and the natural environment. At present, 3D real scene data has gradually become the most important basic data for smart city construction. [0003] With the application of 3D real scene data more and more widely, the data volume of 3D real scene data is increasing exponentially: on the one hand, more and more cities are producing 3D real scene data; on the other hand, in order to better express the urban status, The fineness of 3D real scene data is getting higher an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05
CPCG06T17/05Y02D10/00
Inventor 孙华吴敦刘思言费佳宁王倩
Owner 宝略科技(浙江)有限公司
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