Full-automatic texture mapping method based on vehicle-mounted laser measurement system

A measurement system and vehicle-mounted laser technology, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as low efficiency of 3D models, achieve the effect of improving production efficiency and saving human resources

Inactive Publication Date: 2014-07-30
BEIJING TOVOS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the long-term defect of low efficiency in texture mapping of exist

Method used

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  • Full-automatic texture mapping method based on vehicle-mounted laser measurement system
  • Full-automatic texture mapping method based on vehicle-mounted laser measurement system
  • Full-automatic texture mapping method based on vehicle-mounted laser measurement system

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Embodiment Construction

[0026] specific implementation plan

[0027] Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings:

[0028] A split of the model

[0029] According to the composition structure of the 3D model, the model is decomposed into multiple model faces.

[0030] Automatic acquisition of B texture map

[0031] The texture picture P corresponding to the model surface should meet the following conditions:

[0032] B1 closest principle: In order to ensure the clarity of the model texture map, the distance between the position of P and the center of the model surface (such as figure 1 shown) should not be too far away, the distance D between the position of the texture picture P (the center of the camera) and the center of the model surface is shown in formula (1):

[0033] D = ( Xs - Xa ...

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Abstract

The invention relates to the technical field of surveying and mapping data modeling and computer graphics and particularly relates to a full-automatic texture mapping method based on a vehicle-mounted laser measurement system. For three-dimensional model faces generated from vehicle-mounted laser point clouds, through analysis of the position and attitude of a camera which takes a plurality of pictures along the way, a picture which has a highest effective pixel value relative to a corresponding texture model face is automatically selected and then a texture pixel area corresponding to the model face is captured and stored as a final texture file and then a texture coordinate (u,v) is calculated. The method is capable of realizing automatic selection of a texture picture with the highest quality, corresponding to each model face, and calculation of a corresponding texture coordinate under a condition that vehicle-mounted laser point clouds and camera internal and external orientation elements are given so that automatic three-dimensional model mapping is completed. For a three-dimensional reverse modeling problem which needs to use live-action mapping, the method effectively shortens the time of a texture mapping step in a modeling overall process so that a traditional manual mapping process can be substituted completely; and the method is an obvious improvement of a three-dimensional reverse modeling working process.

Description

technical field [0001] The invention relates to the technical fields of automatic processing of surveying and mapping data and computer graphics, in particular to a fully automatic texture mapping method for a vehicle-mounted laser measurement system. Background technique [0002] A 3D model is a 3D polygonal representation of an object, usually displayed on a computer or other video device. Anything that exists in physical nature can be represented by a three-dimensional model. The current 3D models are widely used in various fields, the medical industry uses them to make accurate models of organs; the film industry uses them for moving characters, objects, and realistic movies; the video game industry uses them as resources in computers and video games ; in science they are used as precise models of compounds; in engineering they are used to design new devices, vehicles, structures and other applications; in surveying and mapping they are used in 3D surveying and 3D digit...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06T7/00
Inventor 浦石赵永屹纪明汝
Owner BEIJING TOVOS TECH
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