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Encoding and reconstruction method of three-dimensional model topological data robust transmission in wireless network

A technology of 3D model and topological data, applied in the multimedia field, can solve the problems that group information cannot be restored normally, affect the effect of model reconstruction, and reduce the efficiency of model coding, etc.

Active Publication Date: 2014-06-04
浙江树联智能科技有限公司
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Problems solved by technology

However, the boundary processing between the fragments after the model is divided is particularly important, and redundant error recovery coding methods are usually used for them in transmission, which reduces the efficiency of model coding
Moreover, the group information lost based on this segmentation method cannot be recovered normally, which will affect the model reconstruction effect

Method used

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  • Encoding and reconstruction method of three-dimensional model topological data robust transmission in wireless network
  • Encoding and reconstruction method of three-dimensional model topological data robust transmission in wireless network
  • Encoding and reconstruction method of three-dimensional model topological data robust transmission in wireless network

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Embodiment Construction

[0015] 1) 3D model topological data encoding.

[0016] First, traverse the 3D model. For any 3D model, the process of traversing the topology of the 3D model is:

[0017] Step 1: Select a triangle on the grid, put its three vertices into an active list (Active List), and take one of the vertices as the focus (Focus).

[0018] Step 2: Traverse all unvisited edges connected to the focus in counterclockwise order, and each time an edge is processed, the corresponding new vertex is added to the active list. When a new vertex is added to the active list, an Add will be output command to record the degree of the vertex.

[0019] Step 3: After processing all the edges connected with the focus, select the next vertex in the active list as the focus, and repeat (2) operation.

[0020] Step 4: Until all the edges in the grid are traversed. Generate information about many vertices that make up the topology. The topological information of each vertex includes its traversal numbe...

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Abstract

The invention discloses an encoding and reconstruction method of three-dimensional model topological data robust transmission in a wireless network. The encoding and reconstruction method includes the steps of firstly, encoding three-dimensional model topological data at a server terminal: particularly, traversing top points of a three-dimensional model according to a certain rule, and obtaining traversal serial numbers, degree information and adjacent point information of the top points; secondly, coloring the top points according to an improved sequence coloring algorithm and the traversal serial numbers of the top points; thirdly, carrying out grouping on the model according to colors, and enabling the top points in the same color to serve as a group; finally, compressing the groups through Huffman coding, and carrying out topology reconstruction on the three-dimensional model at the server terminal: particularly, after the groups are received, ranking the received top points according to the serial numbers from the small serial numbers to the large serial numbers, and then reconstructing the model topological structure based on a value driving decoding method. According to the encoding and reconstruction method, the good reconstruction effect on the three-dimensional model during network transmission with the high packet loss probability can be obtained through the effective model topological data encoding and client terminal reconstruction technology.

Description

technical field [0001] The invention belongs to the field of multimedia technologies related to portable mobile devices in a wireless network, and in particular relates to a coding and reconstruction method for robust transmission of three-dimensional model topology data in a wireless network. Background technique [0002] At the end of 2013, the three major operators of China Mobile, China Unicom and China Telecom obtained 4G operating licenses, marking my country's formal entry into the 4G era. With the gradual spread of 3G / 4G mobile networks and the wide application of wireless networks, various 3D graphics applications for handheld mobile devices have developed rapidly. However, the narrow bandwidth and high packet loss rate of wireless networks and the inherent limited power supply and computing storage resources of mobile devices cannot well meet the requirements of strong realistic display of 3D graphics in mobile computing terminals. . How to robustly transmit 3D g...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04L1/00
Inventor 杨柏林王会琴王勋江照意
Owner 浙江树联智能科技有限公司
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