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Polarized SAR image edge detection method based on similarity testing

An image edge and detection method technology, which is applied in image enhancement, image analysis, image data processing, etc., can solve the problems that are difficult to meet the robustness and high efficiency of polarimetric SAR image edges

Inactive Publication Date: 2017-01-18
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

This processing method is difficult to meet the robustness and efficiency of polarimetric SAR image edge detection

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  • Polarized SAR image edge detection method based on similarity testing
  • Polarized SAR image edge detection method based on similarity testing
  • Polarized SAR image edge detection method based on similarity testing

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[0038] In order to better understand the technical solutions of the present invention, the implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0039] figure 1It is an implementation flow chart of the present invention, the input is the polarimetric SAR image that has been processed by coherent speckle filtering, and the implementation process is mainly composed of five steps: the first step is to carry out the similarity test to the polarization matrix; the second step, the similarity pixel Detection; the third step is to calculate the number of similarity pixels; the fourth step is to detect and process the candidate edge pixels; the fifth step is to process the morphological filtering of the detection results of the candidate edge pixels to obtain the edge detection map of the polarimetric SAR image.

[0040] Figure 2 to Figure 5 It is the processing result of the full polarization SAR data obtain...

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Abstract

The invention belongs to the polarized SAR imaging remote sensing technology field and relates to a polarized SAR image edge detection method based on similarity testing. The method comprises the following steps of a first step, carrying out similarity testing on a polarized coherent matrix; a second step, detecting similarity pixels; a third step, calculating a number of the similarity pixels; a fourth step, carrying out candidate edge pixel detection processing; and a fifth step, carrying out morphological filtering processing on a candidate edge pixel detection result. The method of the invention is simple to realize, implementation is convenient, high-efficient robustness is possessed and the method can be directly used to process polarized SAR images acquired by various kinds of polarized SAR systems. The method has an important reference value in application fields of polarized SAR building edge extraction, road detection, coast line extraction, crop edge extraction and the like.

Description

technical field [0001] The invention belongs to the technical field of polarimetric SAR (Synthetic Aperture Radar, synthetic aperture radar) imaging remote sensing, and relates to a polarimetric SAR image edge detection method based on a similarity test. Background technique [0002] As a microwave sensor, polarimetric SAR can work all day and all day, and has become an important sensor in the field of earth observation. At the same time, by sending and receiving a set of electromagnetic waves with orthogonal polarization states, polarization SAR can obtain the full polarization information of ground objects, which provides an important support for understanding and utilizing the scattering characteristics of ground objects. [0003] Edge features in polarimetric SAR images are an important basis for visual perception, image understanding, and target classification and recognition. Edges indicate abrupt changes in the scattering properties of two adjacent regions in the pol...

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Application Information

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IPC IPC(8): G06T7/13
CPCG06T2207/10044G06T2207/30181
Inventor 陈思伟李永祯王雪松陶臣嵩施龙飞
Owner NAT UNIV OF DEFENSE TECH
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