Method for automatically registering raster image and vector electronic map

An electronic map and automatic registration technology, applied in image analysis, image data processing, radio wave measurement systems, etc., can solve the problems of inconsistency between image edge features and vector information, vector information redundancy, matching difficulties, etc.

Inactive Publication Date: 2012-12-05
TONGJI UNIV
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Problems solved by technology

Generally speaking, the selection of control points is accomplished by matching vectors and images. However, vectors and images are two different types of digital information, and the matching of the two faces many difficulties. The inconsistency of information is caused by: ① Vector information is standardized point, line, and surface data formed through editing, synthesis, and selection, while images are full-element information with continuous gray levels. There is a lot of redundancy in the information, and this inconsistency makes it difficult to match

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  • Method for automatically registering raster image and vector electronic map
  • Method for automatically registering raster image and vector electronic map
  • Method for automatically registering raster image and vector electronic map

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] An automatic registration method for a raster image and a vector electronic map, comprising the following steps:

[0025] 1) Detect the feature type of the raster image, if it is a double-line feature, use wavelet transform edge detection; if it is a centerline feature, use the maximum inter-class variance plus mathematical morphology method to extract;

[0026] 2) According to the feature type of the raster image, edge extraction is performed to obtain an edge image;

[0027] 3) Match the edge image with the vector electronic map as the reference map.

[0028] The feature type of the raster image is bilinear or centerline.

[0029] Described step 2) carries out edge extraction to bilinear raster image by the edge detection based on wavelet transform, it comprises:

[0030] 21) If figure 1 , perform wavelet transform on the bilinear raster image, according to the...

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Abstract

The invention relates to a method for automatically registering a raster image and a vector electronic map, which comprises the following steps of: detecting the characteristic type of the raster image; performing edge extraction to obtain an edge image according to the characteristic type of the raster image; and matching the edge image and the vector electronic map serving as a reference map. In most of conventional registration methods, data sources are required to be consistent; and compared with the prior art, the method has the advantages of capability of realizing the registration of raster data and vector data, and adaptability to the processing of edge lines and centre lines by utilizing two different characteristic extraction methods.

Description

technical field [0001] The invention relates to an image change processing method, in particular to an automatic registration method of a grid image and a vector electronic map. Background technique [0002] In various applications of image change detection, it is a good way to use existing GIS information. GIS data can provide control data for registration and correction of remote sensing images, so that image registration and correction can be quickly and efficiently The key issue is the selection of control points. Generally speaking, the selection of control points is accomplished by matching vectors and images. However, vectors and images are two different types of digital information, and the matching of the two faces many difficulties. The inconsistency of information is caused by: ① Vector information is standardized point, line, and surface data formed through editing, synthesis, and selection, while images are full-element information with continuous gray levels. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G01S7/48
Inventor 林怡张绍明陈映鹰
Owner TONGJI UNIV
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