InSAR rapid image registration method based on quadtree segmentation

An image registration and quadtree technology, applied in image analysis, image data processing, instruments, etc., can solve the problems of decreased local registration accuracy and large amount of calculation, achieve good registration accuracy and calculation efficiency, and reduce calculation efficiency effect

Active Publication Date: 2018-01-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing high-precision registration algorithms often register the InSAR complex images as a whole or fixed blocks. For the large number of complex images in a large scene, large changes in sub-region offsets, etc., there may be a decrease in local registration accuracy. , large amount of computation, etc.

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
  • InSAR rapid image registration method based on quadtree segmentation
  • InSAR rapid image registration method based on quadtree segmentation
  • InSAR rapid image registration method based on quadtree segmentation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0070] The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on MATLABR2015b software. The specific implementation steps are as follows:

[0071] Step 1. Perform overall coarse registration on the InSAR primary and secondary images:

[0072] Initialize the system parameters and observation scene parameters of InSAR complex image simulation, including: the vertical ground height of the system platform is 6000m, and the system working center frequency is 1×10 10 Hz, the length of the horizontal baseline is 4m, the length of the vertical baseline is 0.5m, the radar incidence angle is 45°, the resolution of the system range is 0.5m, the resolution of the system azimuth is 0.5m, and the size of the observation scene is 3000m×3000m. The number of scene resolution units is 6000×6000, and the scattering coefficient of the observed scene is evenly distributed randomly in the [0, 1] interval;

[0073] Ac...

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 an InSAR rapid image registration method based on quadtree segmentation. The method is characterized in that through the combination of an image quadtree segmentation criterionand an FFT maximum correlation coefficient registration principle, rough registration and rough segmentation are carried out on the InSAR main and auxiliary complex images, and then the quadtree treestructure image block segmentation and sub-block FFT maximum correlation coefficient sub-pixel registration are carried out, the sub-block quadtree segmentation and the sub-block sub-pixel registration are carried out on the InSAR complex image one by one, and the global image interpolation of the traditional FFT maximum correlation coefficient registration is avoided, and the rapid sub-pixel registration of the large-scene InSAR complex image is achieved. The global image interpolation of the traditional FFT maximum correlation coefficient registration is avoided, the operation efficiency ofthe large-scene InSAR complex image registration is effectively reduced, and the good registration precision and operation efficiency in the InSAR main and auxiliary complex images with large pixel offset change can be achieved.

Description

technical field [0001] The invention belongs to the technical field of synthetic aperture radar (SAR), in particular to the technical field of interferometric SAR (InSAR) imaging. Background technique [0002] Interferometric Synthetic Aperture Radar (InSAR) is an extension of Synthetic Aperture Radar (SAR) imaging technology, which mainly uses more than two SAR images obtained by observing the same observation scene at different angles or at different time periods by using more than two antennas or multiple passes. Extract the interferometric phase information of SAR images, and then combine the imaging geometric relationship to invert the terrain elevation information, so as to realize the remote sensing technology of high-precision terrain three-dimensional surveying and mapping. For details, see the literature "Li Hongyu. Research on key technologies of interferometric synthetic aperture radar elevation measurement [D]. University, 2016". Interferometric SAR has the adv...

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): G06T7/30G06T7/11G06T7/136
Inventor 韦顺军张晓玲唐欣欣蒲黎明师君
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap