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

A Method of Target Azimuth Estimation in SAR Image Based on Direction Straight Line Screening

A technology of direction straight line and target azimuth, which is applied in the field of estimation of target azimuth angle of synthetic aperture radar image, can solve problems such as easy to generate large estimation deviation, affect the wide use of algorithms, and high estimation accuracy, so as to achieve fast estimation, reduce dependence, improve Effect of Estimation Accuracy

Inactive Publication Date: 2017-10-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The estimation accuracy of this method is higher than the previous two methods, and the acquisition of the dominant boundary does not require complex matrix rotation, and the speed is fast. Estimation confusion, this problem has not been well resolved, affecting the widespread use of the algorithm; moreover, this method is prone to large estimation deviations when the difference between the long and short dominant boundary lengths is small

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
  • A Method of Target Azimuth Estimation in SAR Image Based on Direction Straight Line Screening
  • A Method of Target Azimuth Estimation in SAR Image Based on Direction Straight Line Screening
  • A Method of Target Azimuth Estimation in SAR Image Based on Direction Straight Line Screening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] The test images in the embodiments of the present invention are all from the MSTA (Moving and Stationary Target Acquisition and Recognition) standard data set of the US Defense Advanced Research Projects Agency (DARPA). Take the image HB19820.001 in MSTAR (such as image 3 (a)) as an example for illustration. The image corresponds to the BRDM ground target of model E71, and the elevation angle of the image is 17°.

[0047] Such as figure 1 As shown, the SAR image target azimuth estimation method based on direction straight line screening of the present invention comprises the following steps:

[0048] S1, extract the target, the size of the input image is 128×128, use the image segmentation method to extract the SAR target in the input image, expressed as a binary target matrix O, the size is 128×128; each o...

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 discloses a method for estimating the azimuth angle of a SAR image target based on directional line screening, comprising the following steps: S1, extracting the SAR target from the input image; S2, extracting the target boundary, and expressing its information as a binary boundary matrix ; S3, among the straight lines in the same direction, find the straight line with the largest number of intersection points with the target boundary, as the direction straight line in this direction; S4, among the straight lines in each direction, select the best direction straight line; S5, determine the best direction straight line The angle between is the target azimuth angle to be estimated. The method of the invention does not make too many requirements on the shape of the target, thereby reducing the dependence on the target extraction process; through the screening of two-level direction straight lines, the deficiency of the traditional method in distinguishing vertical and horizontal orientations is made up, and the estimation accuracy is improved. The estimation error is reduced when the difference between the long and short dominant boundary lengths is small; in addition, the method of the invention has low computational complexity and fast estimation.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to an image pattern recognition method, in particular to a method for estimating the azimuth angle of a synthetic aperture radar (Synthetic Aperture Radar, SAR) image target based on direction line screening. Background technique [0002] Synthetic aperture radar has the advantages of all-day, all-weather and strong penetrating ability, and has become an important means of military reconnaissance. In recent years, researches on Automatic Target Recognition (ATR) using high-resolution SAR images continue to emerge. [0003] SAR target images are very sensitive to the azimuth of radar imaging, and the images obtained by the same target in different azimuths are very different. In the traditional SAR ATR system, a large number of SAR template images of different orientations are stored, and the target recognition is realized by matching the target to be recognized with the temp...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/70
CPCG06T2207/10044
Inventor 何艳敏甘涛彭真明
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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