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

A localization method based on video sar shadow

A positioning method and shadow technology, applied in the reflection/re-radiation of radio waves, instruments, measuring devices, etc., can solve the problems of positioning reference point errors and poor positioning accuracy, and achieve the effect of reducing errors and speeding up positioning.

Active Publication Date: 2022-08-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the video SAR imaging is two-dimensional information, only two reference points are needed to complete the conversion of the relative coordinates of the imaging results of the moving target into absolute coordinates, and the positioning of the moving target can be completed, but the positioning reference in the video SAR Points have errors in imaging, and there are many coherent speckle noises in video SAR imaging, and the positioning accuracy in the actual positioning algorithm is poor only based on two reference points

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 localization method based on video sar shadow
  • A localization method based on video sar shadow
  • A localization method based on video sar shadow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The present invention is described in detail below in conjunction with the accompanying drawings and simulation examples to prove the practicability of the present invention.

[0048] Simulation environment: Intel i7-6700 processor, win operating system, matlab software simulation;

[0049] Dataset: Video SAR imaging video data from the Radar and Microwave Laboratory of the University of Electronic Science and Technology of China.

[0050] The method of the present invention is used for simulation analysis in matlab, and the simulation accuracy of different reference points in different frames is as shown in Figure 3, wherein the error ε i defined as:

[0051]

[0052] It can be seen that the video SAR moving target tracking and positioning accuracy of the present invention has a good effect of improving.

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 belongs to the technical field of video SAR moving target tracking and positioning, and in particular relates to a video SAR shadow-based positioning method. The method of the present invention: first, based on the collection of the absolute coordinates of the reference point in the video SAR imaging area, and the detection of the imaging results of the reference point, the relative coordinates, the absolute coordinates and the relative coordinates of the target are obtained, and then the overdetermined equation is established. group, and simplify the equation system, combine the common unknown parameters into new variables, and turn it into an overdetermined linear equation system. Finally, the least squares method is used to complete the estimation of the target parameters. This algorithm cleverly utilizes the commonality of quadratic parameters in solving equations, replaces quadratic equations with linear equations, and uses the parameter estimation advantage of least squares to effectively reduce the error of moving target estimation.

Description

technical field [0001] The invention belongs to the technical field of video SAR moving target tracking and positioning, and in particular relates to a video SAR shadow-based positioning method. Background technique [0002] Moving target detection and analysis has always been the key and hot spot in the research field of Synthetic Aperture Radar (SAR). The American Sandia laboratory proposed the VideoSAR imaging mode in 2003. Through the high frame rate and high resolution imaging of the scene, the dynamic observation of the ground can be realized, and the relevant information of the target area can be grasped in real time. With the increasing level of enemy reconnaissance and precision guidance in the modern military, the requirements for target detection and recognition, as well as detection, tracking and positioning of moving targets are also higher, and the imaging frame rate of SAR increases with the development of radar technology And the improvement of computing har...

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): G01S13/90
CPCG01S13/9021
Inventor 杨晓波李晋闵锐皮亦鸣余正顺曹宗杰崔宗勇
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