Remote sensing image road intersection extraction method based on structural index characteristic

A technology of remote sensing image and structure index, applied in instrument, calculation, character and pattern recognition, etc., can solve problems such as failure, complex distribution of pixel spectral features, and reduced stability of cross-extraction methods.
CN105956544AActive Publication Date: 2016-09-21WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV
Publication Date
2016-09-21

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Abstract

The invention relates to a remote sensing image road intersection extraction method based on structural index characteristic, and the method comprises the steps: a to-be-detected intersection position set is acquired according to line intersection information in a road network vector; an intersection image slice is acquired according to the intersection position and a buffer radius, and a multi-directional morphological filter is adopted to perform enhancement processing to remove obvious small-size interference ground objects. The intersection structure detection is mainly divided into two levels to execute, and the two levels include plane intersection structure detection and road vertical intersection structure detection. When a plane intersection structure detection result is inconsistent with the intersection structure in a navigation road network, a fake detection result caused by separating vertical intersection is considered, and a road vertical intersection structure detection method is further adopted to perform further detection and verification. The composite road intersection structure widely existing is considered, a prior road intersection model is used as a constraint and can perform a structured organization on extracted adjacent road intersection.
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Description

technical field

[0001] The invention relates to the technical field of remote sensing image applications, in particular to a method for extracting road intersections from remote sensing images based on structural index features. Background technique

[0002] The topological structure of road network is one of the contents concerned in the update of basic geographic information road network, and it is an indispensable and important information for building a complete road. Road intersections are the centralized representation of the topological structure between road segments. By detecting the structural information of existing road vector intersections, the connection relationship between roads can be determined, and then the roads can be connected into a road network; and the road intersection information also provides powerful clues for new road detection and verification. Road intersection elements are mainly represented by point objects, which belong to road elements an...

Claims

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