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Matching query method based on similarity between spatial scenes

A technology of spatial scene and similarity, applied in the field of cartography and geographic information science, which can solve the problems of single spatial spatial relationship and no combination of multiple spatial relationships for analysis.

Inactive Publication Date: 2016-12-07
LANZHOU JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

[0004] Among the many query methods for scene similarity, some methods only consider a single spatial relationship, and do not integrate multiple spatial relationships for analysis.

Method used

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  • Matching query method based on similarity between spatial scenes
  • Matching query method based on similarity between spatial scenes
  • Matching query method based on similarity between spatial scenes

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Embodiment Construction

[0016] In order to describe the technical content, structural features, objectives and effects of the present invention in detail, the following will be described in detail in combination with specific embodiments.

[0017] The implementation steps of the present invention can be summarized into two parts: the calculation of the geometric similarity of the scene and the calculation of the similarity of the spatial relationship of the scene. Each implementation step is further described below.

[0018] The technical scheme adopted in the present invention is to carry out according to the following steps.

[0019] 1. Geometric similarity of spatial scenes:

[0020] Step 1: Propose the size similarity of spatial objects, and the size similarity of area objects is:

[0021] SIM S = (1)

[0022] Step 2: Propose shape parameters that affect the shape of the spatial object:

[0023] (1) Ratio of vertical and horizontal axes: the ratio of the length and width of the rectangle ...

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Abstract

In order to solve a problem of query of similarity between spatial scenes, the invention considers geometrical features of a space object, and a topological relation, a direction relation and a distance relation between the space objects and provides a similarity algorithm matched with a building scene, and the similarity algorithm comprises geometric similarity between the space objects and spatial relationship similarity between the space objects, wherein the spatial relationship similarity includes topological similarity, direction similarity and distance similarity; and a geometric feature similarity calculation model and a spatial relationship similarity calculation model for calculation of the spatial scenes are respectively provided. Through utilizing the geometrical similarity calculation model for the spatial scenes to carry out rough similarity matching on the objects in a database and then utilizing the spatial relationship model to carry out accurate matching, the query of the similarity between the spatial scenes is completed. The models can objectively reflect the internal relation between the spatial scenes, and the query effect is good.

Description

technical field [0001] The invention belongs to the field of cartography and geographic information science and technology, and relates to a method for spatial query by using scene similarity. Background technique [0002] A space scene is a complex of space objects and their relationships. Scene query is the process of seeking matching spatial objects in the spatial database by providing one or a group of query conditions. Although the previous method based on attribute query can quickly and efficiently find the query target, it is very limited for geometric target query. Scene query is more in line with people's daily cognition and living habits. [0003] The description of the geometric features of space targets is relatively simple. For example, Yuan S, Chuang D et al. studied the matching method based on the centroid of planar targets to test the geometric features; Saalfeld proposed a matching method combined with the spatial position of the target; Wang Zhonghui and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/2462
Inventor 刘涛段晓旗张黎明王中辉闫浩文
Owner LANZHOU JIAOTONG UNIV
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