Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Similarity test-based dual-polarimetric SAR (synthetic aperture radar) image coherence speckle filtering method

A dual-polarization and speckle technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as inaccurate selection of similar candidate sample pixel sets, lack of coherent speckle filtering methods, and reduced coherent speckle filtering performance. Achieve high-performance coherent speckle filtering processing, easy implementation, and smooth coherent speckle noise

Inactive Publication Date: 2018-02-09
NAT UNIV OF DEFENSE TECH
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ignoring these important information may lead to inaccurate selection of similar candidate sample pixel sets, thereby reducing the final coherent speckle filtering performance
In addition, there is currently a lack of targeted coherent speckle filtering methods for only part of the polarization information that can be obtained by dual-polarization SAR

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Similarity test-based dual-polarimetric SAR (synthetic aperture radar) image coherence speckle filtering method
  • Similarity test-based dual-polarimetric SAR (synthetic aperture radar) image coherence speckle filtering method
  • Similarity test-based dual-polarimetric SAR (synthetic aperture radar) image coherence speckle filtering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] 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.

[0024] figure 1 It is an implementation flowchart of the present invention, mainly consisting of three steps. The first step is to calculate the similarity parameter matrix with the pixel to be filtered as the center neighborhood. The second step is to determine the set of candidate sample pixels in the neighborhood that are similar to the pixels to be filtered. The third step is to perform filtering processing on the pixels to be filtered. After traversing the whole image, the result image after coherent speckle filtering is obtained. The above steps are as follows:

[0025] Let the polarization covariance matrix corresponding to the pixel (i, j) to be filtered in the dual-polarization SAR image be C ij ,i=1,2,...,I,j=1,2,...,J, I, J represent the total n...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a similarity test-based dual-polarimetric SAR (synthetic aperture radar) image coherence speckle filtering method. According to the technical schemes of the invention, similar candidate sample pixel sets are selected, and an unbiased estimator is adopted to filter the similar candidate sample pixel sets. The selection of the similar candidate sample pixel sets includes the following steps that: neighborhoods are selected with each pixel to be filtered in a dual-polarimetric SAR image adopted as a center; similarity parameters between any pixel in each neighborhood and acorresponding pixel to be filtered are calculated; and pixels of which similarity parameters are greater than a preset threshold, in each neighborhood, are selected to form a similar candidate samplepixel set of corresponding pixels to be filtered. With the method adopted, the similar candidate sample pixel set can be adaptively and accurately selected, so the high-performance coherent speckle filtering of the dual-polarimetric SAR image can be realized.

Description

technical field [0001] The invention belongs to the technical field of SAR (Synthetic Aperture Radar, synthetic aperture radar) imaging remote sensing, and relates to a dual-polarization SAR image coherent speckle filtering method based on similarity test. Background technique [0002] Dual-polarization SAR has the ability to obtain partial polarization information of ground objects, and effectively compromises between information acquisition, imaging mapping bandwidth and system complexity, and has been widely used in many fields. As a coherent imaging system, dual-polarization SAR images are seriously affected by coherent speckle phenomenon, which brings difficulties and challenges to subsequent image understanding and interpretation. When carrying out applications such as target detection, classification and recognition, it is usually necessary to preprocess SAR images with speckle filtering. Speckle filtering methods with excellent performance can fully suppress speckle...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06T5/00G06T7/13
CPCG06T7/13G06T2207/10044G06T2207/20024G06T5/70
Inventor 陈思伟李永祯王雪松肖顺平陶臣嵩
Owner NAT UNIV OF DEFENSE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com