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On-line three-dimensional quick visualization algorithm based on texture compression

A technology of 3D models and textures, which is applied in computing, image data processing, 3D image processing, etc., and can solve problems such as large amount of data

Inactive Publication Date: 2015-04-29
NANJING UNIV OF FINANCE & ECONOMICS +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since most of the 3D textures are image data, the amount of data is large and requires a lot of computing resources for processing, so it is necessary to simplify the 3D textures to improve the visualization efficiency

Method used

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  • On-line three-dimensional quick visualization algorithm based on texture compression
  • On-line three-dimensional quick visualization algorithm based on texture compression
  • On-line three-dimensional quick visualization algorithm based on texture compression

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Embodiment Construction

[0017] The invention can be implemented in various application occasions, and provides a flexible and configurable multi-detail level texture model. Specific steps are as follows:

[0018] Step 1 uses wavelet transform to compress the texture image of the three-dimensional model from both horizontal and vertical directions;

[0019] Step 2: When the user needs to access the 3D model, obtain the coordinates of the user's current viewpoint position;

[0020] Step 3: Detect the distance between the current viewpoint and the 3D model to be loaded, and calculate the angle between the user's line of sight and the normal vector of the plane in the 3D model on the horizontal and vertical planes, and then use the provided formula to calculate Produce the desired level of detail for the texture model;

[0021] Step 4 dynamically generates or selects model texture data according to the level of detail in step 3, and displays it visually.

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Abstract

Texture data are important constituents of a three-dimensional model and greatly affect the visualization effect on the three-dimensional model; but the texture data volume of the three-dimensional model is large and is generally a bottleneck for increasing the model visualization speed. The invention provides a three-dimensional model texture coloring method based on image partitioning. According to the method, the texture data of the three-dimensional model are processed, and the surface of the three-dimensional model is partitioned into parts (blocks with the same colors) with similar colors, thus eliminating image textures and greatly reducing the data volume. Furthermore, the adjacent blocks with the same colors are subjected to combination operation to generate texture trees of the model, and a texture coloring scheme with different detail levels is provided for different application scenes. By the three-dimensional model texture coloring method, the data volume of the three-dimensional model is greatly reduced, and the three-dimensional model visualization speed is increased.

Description

1. Technical field [0001] The present invention is oriented to online 3D model visualization applications, especially for wireless-based 3D model applications such as 3D maps, 3D commodity display and other fields, and proposes a fast visualization algorithm for 3D models based on texture compression. This method uses wavelet transform to compress texture data, generates multi-level textures, and realizes dynamic loading of detailed textures according to the user's viewpoint, thereby reducing the amount of texture transmission in the online visualization process. The invention mainly relates to the fields of image processing, spatial analysis and three-dimensional visualization. 2. Background technology [0002] Texture data plays an important role in 3D models, has a great influence on the visual effect of 3D models, and can greatly improve the authenticity of 3D models, so it is widely used in 3D models. However, since most of the 3D textures are image data, the amount of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/00
CPCG06T15/04
Inventor 毛波李斌曹杰冀怀远伍之昂
Owner NANJING UNIV OF FINANCE & ECONOMICS
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