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Full-automatic three-dimensional conversion method aiming at grating architectural plan

A conversion method and planar technology, applied in 3D modeling, image data processing, special data processing applications, etc., can solve the problems of complex 3D building model construction operations, etc.

Inactive Publication Date: 2013-11-13
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

[0007] The purpose of the present invention is to propose a light-weight method for automatically reconstructing a 3D building model based on a raster building plan for the shortcomings of the existing 3D building model construction operations.

Method used

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  • Full-automatic three-dimensional conversion method aiming at grating architectural plan
  • Full-automatic three-dimensional conversion method aiming at grating architectural plan
  • Full-automatic three-dimensional conversion method aiming at grating architectural plan

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Embodiment Construction

[0062] The present invention proposes a lightweight calculation method for automatically generating a three-dimensional architectural model from a grating architectural plan, and the specific process is as follows figure 1 As shown, it includes the following five steps:

[0063] (1) Binarize and rectify the raster architectural plan to obtain the preprocessed image.

[0064] raster building plan Figure II The value conversion uses the cvThreshold function in the OpenCV library function to obtain the binarized image; the correction is: use the cvHoughLines2 function in the OpenCV library function to perform Hough line segment detection on the binarized image, and extract the binarized image In the long straight line segment, calculate the slope value of these long straight line segments, and then use the cvGetQuadrangleSubPix function in the OpenCV library function to perform rotation correction on the binarized image, so that the long straight line segment is parallel to the...

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Abstract

The invention discloses a full-automatic three-dimensional conversion method aiming at a grating architectural plan. The method comprises the following steps of (1) performing binaryzation and correction on the grating architectural plan to obtain a preprocessed image; (2) extracting an image region comprising wall lines from the preprocessed image to obtain a plurality of sub-images; (3) performing vectorization processing on all sub-images to correspondingly obtain a line segment set with wall width, and performing extraction operation on the line segment set to obtain information such as wall positions and the wall width; (4) obtaining subgraphs of wall appendants through the line segment set in step (3), and judging the specific classes of the subgraphs of the wall appendants by using a linear identification analytical algorithm; and (5) converting data in steps (3)and (4) into three-dimensional structure data according to a preset height.

Description

technical field [0001] The invention relates to a raster image of a building plan, which synthesizes and improves research in the fields of vectorization, image recognition and shape grammar, and in particular relates to a fully automatic three-dimensional conversion method for a raster building plan. Background technique [0002] With the rapid development and structural adjustment of my country's national economy, the process of urbanization has become an irresistible historical trend. In order to effectively manage the increasing scale of cities, including dealing with various security emergency issues, stopping illegal construction in the process of urbanization, and avoiding a large number of disadvantages in construction, "digital city" technology has been widely valued and applied. Based on computer graphics, multimedia, and large-scale cluster computing and storage technology, the technology uses the network as a link, and comprehensively uses technologies such as re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T17/00
Inventor 张宏鑫李嫄姝郑文庭鲍虎军
Owner ZHEJIANG UNIV
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