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High score sar new construction land extraction software based on variogram

A technology of construction land and variogram, which is applied in the field of information technology image recognition, can solve the problems of insufficient ability to maintain high-resolution SAR image structure features and cannot meet the needs of practical applications, etc.

Active Publication Date: 2020-08-07
AEROSPACE INFORMATION RES INST CAS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ability to maintain the structural features of high-resolution SAR images is not enough to meet the needs of practical applications.

Method used

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  • High score sar new construction land extraction software based on variogram
  • High score sar new construction land extraction software based on variogram
  • High score sar new construction land extraction software based on variogram

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Experimental program
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Embodiment Construction

[0030] 1. Image filtering

[0031] Specific steps such as figure 2 Shown:

[0032] 1. Strong point target marking and retention

[0033] Strong point targets in SAR images are common and important targets in SAR images. They often correspond to some artificial ground objects similar to corner reflectors. The precise positioning of these points for certain specific targets and the selection of image points with the same name important and should therefore be retained. If the specificity of these point objects is not considered, the filter can easily smooth them out as noise. In addition, these strong reflection points will also seriously affect the filtering process of its surrounding pixels. Therefore, strong point targets should be marked so that they do not participate in the filtering calculation of surrounding pixels.

[0034] The identification method of strong point target is as follows:

[0035] Using a 5*5 rectangular window, if the average ratio of the central p...

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Abstract

The purpose of this software is to automatically extract new construction land from high-resolution SAR images, which belongs to the field of image recognition. Based on the variogram method, the software can automatically and accurately extract new construction land in high-resolution SAR images. The main steps of the software are as follows: first, preprocess (filter) the input image; second, calculate the variogram to obtain the texture features of the two images; third, calculate the ratio of the two texture feature images, and construct the difference Fourth, perform threshold segmentation processing on the contrast value image to generate a binary image, which is the initial extraction result of newly added construction land; fifth, perform post-processing on the binary image to generate the final extraction result and perform accuracy evaluation. The extraction accuracy of this software can reach more than 80% through internal tests, and it can be applied to the detection of architectural change areas such as urban planning, demolition compensation definition, etc.

Description

technical field [0001] This software belongs to the field of information technology image recognition, and can be used to extract newly added construction land in high-resolution Synthetic Aperture Radar (SAR) images of different time phases. Background technique [0002] SAR has become one of the important means of earth observation with its advantages of all-day, all-weather reconnaissance and high-resolution imaging. In recent years, with the acquisition of a large number of meter-level and sub-meter-level high-resolution SAR images, urban environment research based on SAR images has become one of the important topics in the field of SAR image interpretation. As a key link, image recognition provides a basis for thematic interpretation of urban land use investigation, change detection, map drawing, and disaster monitoring. At present, SAR image recognition is mainly based on statistical methods based on image gray distribution models and methods based on texture analysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V20/176G06V10/443
Inventor 程博崔师爱刘岳明李婷王燕红
Owner AEROSPACE INFORMATION RES INST CAS