A Method of Extracting Topological Points of Road Network in Images

Abstract

The invention proposes a method for extracting road network topological points in pictures, which can quickly and accurately identify nodes, inflection points and intermediate nodes of the road network. The method includes four steps: image information reading, image preprocessing, skeleton graph scanning to obtain topological points and road nodes, and deletion of redundant nodes. The method of the invention extracts road network topological points based on image recognition, and provides a basis for obtaining road network data and topological relations. This method expands the construction method of the basic database of the virtual road traffic system, and realizes the rapid acquisition of road network topological point data in batches, which can be applied to planning regional roads. At the same time, the method makes full use of the road network pictures presented by the map software and expands the source of road network data.

Description

technical field [0001] The invention relates to the field of basic database construction of a virtual road traffic system based on image processing, and relates to a method for extracting road network topological points in a picture. Background technique [0002] The basic database construction of the virtual road traffic system refers to the establishment of a road network database, the core of which includes acquiring and storing road network nodes, topological adjacency relations and road direction data. As the basic traffic information data of multiple industries, the road network has important applications in urban planning, traffic planning, travel navigation services, emergency rescue, and military affairs. The key to road network construction is topological points, and how to quickly obtain road topological point data in batches is of great significance. [0003] The current basic database construction methods of virtual road traffic system are divided into manual i...

AI Technical Summary

Problems solved by technology

However, the basic database is kept confidential. Users can only use the listed open API (Application Programming Interface) function provided by the map software to display the results of API-related service data, and cannot directly access and use internal data, programs, modules, etc.

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