Three-dimensional-live-action-model-based automatic detection and system for building changing
A real-life model and automatic detection technology, which is applied to measurement devices, instruments, and optical devices, etc., can solve the problems of inability to detect changes based on remote sensing images, and achieve the effects of flexible data acquisition methods, high data accuracy, and fast speed.
Active Publication Date: 2016-10-12
CHONGQING SURVEY INST
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Problems solved by technology
Especially in the development of urban construction, the acquisition of local change information of urban buildings is of great significance for detecting urban development dynamics, but the traditional change detection based on remote sensing images is powerless
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[0026] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.
[0027] The present invention establishes a unified coordinate system, constructs three-dimensional solid blocks, and resamples the obtained three-dimensional real-scene model data in different periods to obtain three-dimensional point cloud data corresponding to the three-dimensional real-scene models in different periods, and respectively The 3D point cloud data of each period is matched with the constructed 3D solid block to obtain the change of the 3D point cloud data contained in the same position of the three-dimensional bl...
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The invention discloses a three-dimensional-live-action-model-based automatic detection and system for building changing. According to the automatic detection method, a uniform coordinate system is established for three-dimensional live-action models at different stages and a plurality of three-dimensional blocks are constructed in the coordinate system; sampling is carried out on the three-dimensional live-action models at different stages to obtain corresponding three-dimensional point cloud data; matching of all three-dimensional point cloud data collected each time and all constructed three-dimensional blocks is carried out, thereby obtaining three-dimensional blocks where the three-dimensional point cloud data are located and the current number of the three-dimensional point cloud data included by each three-dimensional block; and then the numbers of the three-dimensional point cloud data included by three-dimensional blocks at the same position at different stages are compared to obtain a change value, so that a building changing position is obtained.
Description
technical field [0001] The invention relates to the field of three-dimensional change detection of buildings, in particular to an automatic detection method and system for building changes based on a three-dimensional real scene model. Background technique [0002] Change detection technology has always been a research hotspot in the field of remote sensing applications. In-depth research has been carried out on the change detection methods of satellite remote sensing images and aerial remote sensing images at home and abroad, and has been widely used. However, the traditional change detection method can only obtain the change of plane information, and it is difficult to obtain the change of additional elevation information. With the development of cities, we have more and more precise requirements for detection technology, not only to obtain changes in plane information, but also to obtain changes in local elevation information. Especially in the development of urban const...
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CPCG01B11/16
Inventor 梁建国胡开全周智勇刘昌振张俊前欧阳晖马红魏世轩
Owner CHONGQING SURVEY INST