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Semantic Method of Building 3D Model

A technology of 3D models and buildings, applied in the field of 3D semantic modeling of buildings, can solve the problems of restricting the development of urban data, and achieve the effect of avoiding real scene shooting

Active Publication Date: 2021-07-02
TERRA DIGITAL CREATING SCI & TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limits the development of urban data and the formation of basic large databases required for the construction of smart cities

Method used

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  • Semantic Method of Building 3D Model
  • Semantic Method of Building 3D Model
  • Semantic Method of Building 3D Model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 2 Under the geographical coordinate system GL of a certain known provincial capital city A shown, there is a sub-region of interest at the vertex of the vector Oo. Establish the coordinate system L of the geographic sub-region. The origin of L is on floor 5 of local 1, that is, on the xoy plane where the foundation is located. The verticality of the wall and the quality of the coating material on the outer surface of the wall are determined). Part 1 of a certain floor drawing of a 28-story apartment building divided in L (the floor is the first floor). This part 1 belongs to a building in the training set that participated in the construction of the method of this embodiment, and the coordinates of the geometric center c (not shown) of the corresponding building a in the corresponding software drawing under L are used as the building pointer P1, P2, P3..., thus belonging to the establishment of multiple geographic sub-region drawing libraries, and mult...

Embodiment 2

[0040] Then carry out the semantic classification of building functions, use the part 1 in the embodiment 1 as the training image, and the ratio of the actual training training set and the verification set is 2:1. First, classify the types of building functions to form a type text image as the identification unit, use the word "apartment" to select the No. 3 Song typeface, and create a computer-recognizable graphic type picture p ij Such as Figure 4 As shown, as the recognition unit for the classification of buildings such as apartments, the geometric center coordinates of each building in the training set drawings under L are arranged in a matrix M= from west to east and from north to south in L. , where matrix element a m1 means figure 2 The matrix element of a building in the southwest corner of the middle part 1 under L, a m1 Including the geometric center coordinates P of the building m1 , and building component parameters.

[0041] Among them, the building compon...

Embodiment 3

[0048] Continue embodiment 2 for matrix element a m1 Construct a textual semantic model (other matrix element processing methods are the same), including the following steps:

[0049] S3-1 Use 3Dmax software to extract each building component in the architectural drawings, such as figure 2 Including the west exterior wall 2, the south exterior wall 3, the interior wall 4, the floor 5, the beam 6, the window hole 7, and the beam hole 8, obtain the four vertices of each building component closest to a rectangular surface of x-o-y-z under L Coordinates, build matrix m 西外墙 = , m 南外墙 = , m 内墙 = , m 楼层 = , m 梁 = , m 窗洞 = , m 梁洞 = , where b ij22 is the geometric center coordinates of building components (ij=west exterior wall, south exterior wall, interior wall, floor, beam, window opening, beam opening), and its z-axis coordinate is defined as the height of the building under L, other non-zero matrix elements are four vertex coordinates, the four vertices of ...

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Abstract

The invention discloses a method for semantically interpreting a three-dimensional model of a building based on software drawings. Model verification; S5 unknown building type discrimination and establishment of unknown city database. The method of the invention can accurately carry out the semantic recognition of buildings at the city level, so as to guide the intelligent management and application of urban water and electricity, the buildings themselves, and the search purpose of helping other industries.

Description

technical field [0001] The invention relates to a three-dimensional model semantic method of a building, in particular to a method for organizing a text semantic model of building construction, and belongs to the field of three-dimensional semantic modeling of buildings. Background technique [0002] Building identification is a project of smart city construction, which plays a vital role in the digitization of cities. The previous technology used CAD, 3DMAX, UG and other software to realize the local identification and data tracking of the detailed structure and building components (walls, floors, roofs) and their parameters of a single building individual, but did not identify and classify them. [0003] Three-dimensional semantic modeling is a kind of semantic construction based on the characteristics of different recognition targets, so as to display the corresponding position on the graphic carrier. There are roughly two directions for 3D existing semantic modeling. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/05G06F16/55G06F16/56G06K9/62G06N3/04G06N3/08G06N20/10
CPCG06T17/05G06F16/55G06F16/56G06N20/10G06N3/08G06N3/045G06F18/2411
Inventor 刘俊伟
Owner TERRA DIGITAL CREATING SCI & TECH (BEIJING) CO LTD
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