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Road semi-automatic extraction method and system based on circular template

A circular template and extraction method technology, applied in character and pattern recognition, image analysis, image enhancement, etc., can solve problems such as calculation interference and extraction result impact

Inactive Publication Date: 2015-09-09
WUHAN UNIV
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Problems solved by technology

It’s just that when determining the best road direction, it is necessary to rotate the template according to the divided rotation angle. The difference in the thickness of the angle division will affect the extraction results. At the same time, it is easy to rotate the non- The road features are included in the template, which interferes with the calculation

Method used

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  • Road semi-automatic extraction method and system based on circular template
  • Road semi-automatic extraction method and system based on circular template
  • Road semi-automatic extraction method and system based on circular template

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Embodiment Construction

[0044] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0045] please see figure 1 , a kind of road semi-automatic extraction method based on circular template provided by the invention, comprises the following steps:

[0046] Step 1: Filter and preprocess the image containing the road; combined with the geometric features (spectral features, shape features, texture features) of the road in the image, use the multi-directional morphological filtering method to preprocess the image to achieve The purpose of highlighting the characteristics of the road and smoothing the internal noise of the road;

[0047] The mul...

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Abstract

The present invention discloses a road semi-automatic extraction method and system based on circular templates. The method comprises seven steps of filter pre-processing of road-containing images, acquisition of morphological gradient images, generation of an optimal circular template, acquisition of a reference template gray value, search of to-be-matched templates, encryption of road central points and generation of road center lines. The system comprises an image pro-processing module, a morphological gradient image acquisition module, a circular template generation module, a reference template gray value acquisition module, a matching template searching module and a center line generation module. By combining geometrical characteristics of a road, a multi-direction morphological filter method is adopted to pre-process the images and smooth noises of the road, facilitating follow-up extraction; the circular template is selected at the same time and can well fit the road; the searching speed of the to-be-matched templates is high; and a smooth center line is good in effect by polyline fitting.

Description

technical field [0001] The invention belongs to the technical field of photogrammetry and remote sensing image application, and relates to a road extraction method and system for different images, in particular to a semi-automatic feature extraction, multi-source remote sensing image data matching and image splicing method for roads with different images and system. Background technique [0002] The development of remote sensing satellite observation technology has brought higher resolution and stronger real-time data, and at the same time brought more challenges to the technical aspects of data processing. As one of the important members of basic geographic information, road is an important artificial feature, which has important value in remote sensing image interpretation, spatial database update, national defense security, national disaster relief, urban and rural planning management and development, etc. The representation of roads in high-resolution remote sensing ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06K9/00G06T7/00
CPCG06T7/73G06T2207/10032G06V20/588G06V10/443
Inventor 万幼川谭仁龙袁芳李刚
Owner WUHAN UNIV
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