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Raster-Vector Data Conversion and Continuous Scale Expression Method Based on Image Pyramid

A vector data and expression method technology, applied in image data processing, 2D image generation, image enhancement, etc., can solve the labor cost limitation of vectorization efficiency and accuracy, increase the time complexity of geospatial data processing, and difficult to obtain continuous scales expression, etc.

Active Publication Date: 2020-07-10
HUAZHONG NORMAL UNIV
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Problems solved by technology

However, on the one hand, traditional multi-scale representations are processed separately based on different data sources in the field of remote sensing and cartographic synthesis. This data processing method greatly increases the time complexity of geospatial data processing; on the other hand, vector The multi-scale expression of data generally only expresses the results on a limited scale, and it is difficult to obtain continuous scale expression beyond the limited scale
Traditional raster-vector data conversion uses manual vectorization, but with the massive growth of geospatial data, the human cost and human error of manual vectorization limit the improvement of vectorization efficiency and accuracy

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  • Raster-Vector Data Conversion and Continuous Scale Expression Method Based on Image Pyramid
  • Raster-Vector Data Conversion and Continuous Scale Expression Method Based on Image Pyramid
  • Raster-Vector Data Conversion and Continuous Scale Expression Method Based on Image Pyramid

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[0037] 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.

[0038] see figure 1 and figure 2 A method for automatic conversion and continuous expression of raster-vector data based on an image pyramid provided by an embodiment of the present invention includes the following steps:

[0039] Step 1: Preprocessing the remote sensing images;

[0040] Step 1.1, select the cloud shadow area, hill shadow area on the original remote sensing image, or select the water body area with a gray value less than 8 on the near-infrared band or the vegetation area with a gray value less than 5 on the red band as the area of ​​intere...

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Abstract

The invention discloses a raster-vector data conversion and continuous scale expression method based on image pyramid. First, remote sensing images are preprocessed, and multi-scale visual expressions are performed on the preprocessed remote sensing images to obtain multi-scale raster remote sensing images. ; Then perform noise processing on the multi-scale raster remote sensing image obtained in step 2, and perform automatic vectorization operation on the multi-scale raster remote sensing image after noise processing; Finally, simplify the image after automatic vectorization operation to obtain Simplified continuous scale representation of processed vector images. This invention comprehensively and organically integrates the currently mature remote sensing image processing technology and map mapping, realizes the automation of raster-vector data conversion of remote sensing image data and the continuous scale expression of remote sensing raster data and map vector data, and greatly improves geospatial data. Processing efficiency and effectiveness.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing and cartography synthesis, and relates to a geospatial data grid-vector automatic conversion and continuous scale expression method, in particular to a geospatial data grid that integrates remote sensing data processing and map cartography synthesis -Vector automatic conversion and continuous scale expression method. Background technique [0002] The multi-scale expression of geospatial data is one of the important contents in the field of photogrammetry and remote sensing, as well as in the field of cartography and geographic information system. , image classification, and mixed pixel decomposition provide entry points; in the field of geographic information systems, the multi-scale expression of geographic elements is based on the existing cartographic rules and the distribution of thematic features to combine spatial data between scales and apply them to multiple Scale-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/00G06T5/00
CPCG06T11/001G06T2207/20221G06T2207/30181G06T2207/10032G06T5/70
Inventor 李畅刘晓娟
Owner HUAZHONG NORMAL UNIV
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