Characteristic reservation based three-dimensional model progressive transmission method

Abstract

A progressive transmission method of 3D models based on feature preservation, which improves the feature preservation on the basis of the original 3D model simplification algorithm. While simplifying the geometric model, it maintains the topological properties and attribute characteristics of the model, and obtains a relatively large amount of data. A small base grid; and on this basis, the compression coding based on octree division is implemented to construct a progressive grid file. When transmitting, first use the octree breadth to first traverse the decoding base grid, and then use the progressive grid transmission method to transmit a series of detail restoration information, continuously improve the model accuracy, and restore the original model, thus solving the problem of response time of traditional transmission methods long question. In addition, an object-oriented viewpoint-related transmission strategy is designed for the 3D scene, which accelerates the real-time rendering of the scene, and puts the object visibility judgment on the client side, reducing the server load.

Description

technical field [0001] The present invention relates to the technical field of 3D model simplification, geometric compression coding, and progressive transmission, especially a feature-preserving 3D model progressive transmission method, which can be applied to the processing of various 3D models with complex texture and structural features and web publishing. In addition, it is also applied to the network publishing of precious cultural relics in digital museums. Background technique [0002] In computer graphics, triangular meshes are generally used to describe complex three-dimensional shapes. With the continuous improvement of 3D data capture technology, the amount of grid data will be very large, which brings many difficulties to the storage, transmission and rendering of 3D models. The digital museum contains a large number of 3D models that need to be displayed online. The most basic ones, such as the transmission of a single model exhibit, and the complex ones, suc...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the user wait time is too long

[0004] For the progressive grid method, there have been many methods to improve it. However, most of these methods are for relatively regular geometric models without attributes, and do not involve attribute information such as texture, and do not support 3D scenes.

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