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A method and device for automatically acquiring house outlines in a three-dimensional oblique photography scene

A technology of oblique photography and automatic acquisition, applied in the field of data modeling, can solve the problems of long acquisition work time, low stability, low acquisition efficiency, etc., and achieve the effect of saving manual operation time, fast calculation time, and small storage capacity

Active Publication Date: 2021-10-22
吉奥时空信息技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the object of the present invention is to provide a method and device for automatically acquiring the outline of a house in a three-dimensional oblique photographic data scene, aiming at solving the need for manual acquisition of data in the prior art, which makes the acquisition time long and the acquisition efficiency low. Low stability and other technical issues

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  • A method and device for automatically acquiring house outlines in a three-dimensional oblique photography scene
  • A method and device for automatically acquiring house outlines in a three-dimensional oblique photography scene
  • A method and device for automatically acquiring house outlines in a three-dimensional oblique photography scene

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Embodiment 1

[0041] Such as figure 1 As shown, the method for automatically obtaining the outline of a house in a three-dimensional oblique photographic data scene provided by the embodiment of the present invention includes the following steps:

[0042] Step S1, select the scope of the building, and select an anchor point on the building, the building is a three-dimensional city model established by oblique photogrammetry data, and the three-dimensional city model is composed of a continuous triangular network;

[0043] In this step, if figure 2 As shown in , the 3D city model is composed of continuous triangular networks. In order to narrow the scope of data tracking, such as image 3 As shown, it is necessary to manually select the approximate range of the building, and in order to obtain accurate algorithm results, in general, the selected anchor point falls on the vertical wall of the building with a certain height. In addition, the anchor point elevation Within the deviation range...

Embodiment 2

[0060] Such as Figure 11 As shown, the present invention provides a device for automatically acquiring house outlines in a three-dimensional oblique photographic data scene, which is used to complete the method for automatically acquiring house outlines in a three-dimensional oblique photographic data scene provided by the present invention. The device for automatically obtaining house outlines in the data scene includes the following units:

[0061] Input unit: used to establish a 3D city model, select the building range, and select the starting anchor point of the building;

[0062] Data strip acquisition unit: After filtering out the vertices of the triangular network within the scope of the building, further filtering out the point sets whose elevation values ​​are within a certain deviation range from the anchor point elevation values, and projecting the filtered point sets to the horizontal plane , forming a two-dimensional plane data strip;

[0063] Tracking point ex...

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Abstract

The present invention is applicable to the technical field of data modeling, and provides a method and device for automatically obtaining the outline of a house in a three-dimensional oblique photography data scene. The method includes: selecting a building range, and selecting an anchor point on the building, The screened vertex point set is projected onto the horizontal plane to form a two-dimensional plane data strip, and the boundary tracking algorithm is used to initially extract the building outline for the data strip, and among the initially extracted tracking points, for each tracking point point, calculate the angle formed between it and two adjacent tracking points, if the angle is significant, it is judged that the current tracking point is a corner point; refine the obtained corner point to obtain a new corner point, according to the extracted final The corner points are sequentially connected to obtain the outline of the building. In the present invention, the computer automatically tracks the outline of the building, automatically extracts the corner points, and outputs the outline of the building, and the storage capacity of the calculation result is small, the calculation time is fast, and the algorithm stability is high, saving manpower, time and resources.

Description

technical field [0001] The invention belongs to the technical field of data modeling, and in particular relates to a method and a device for automatically acquiring house outlines in a three-dimensional oblique photographic data scene. Background technique [0002] Oblique photogrammetry data is an important data for 3D modeling of cities. The 3D model output by oblique photogrammetry data modeling is a continuous triangulation network, without separate distinctions between buildings and ground objects; while the application of oblique photogrammetry data, It is necessary to perform operations such as selection, attribute assignment, and attribute query on individual objects. Therefore, obtaining the outline of buildings efficiently and accurately to realize building individualization is an application problem worthy of research at present. [0003] At present, in actual software applications, in the technology of accurately obtaining the outline of houses, manual semi-autom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/13G06T7/246
CPCG06T7/13G06T7/246
Inventor 张立宁牟明杨曦贺楷锴刘芬池晶尹心亮阮璐贾宏李新圆李敏邢侃侃郭洁徐磊寇晓松燕斐肖超
Owner 吉奥时空信息技术股份有限公司
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