Polarized InSAR interferogram estimation method based on generalized scattering vector
A technology of generalized scattering vector and interferogram, applied in the field of polarization interferometric synthetic aperture radar, can solve the problem of insufficient utilization of polarization information, and achieve high-quality interferometric phase diagram, fully utilized polarization information, and good robustness. Effect
Active Publication Date: 2015-04-22
XIDIAN UNIV
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] Aiming at the defect that the polarized InSAR interferogram generation technology in the prior art does not fully utilize the polarization information, the present invention proposes a method for estimating the polarized InSAR interferogram based on a generalized scattering vector. By establishing a generalized scattering model, And based on this model to reduce the impact of polarization channel and / or spatial channel registration error on polarization coherent optimal decomposition and interferometric phase map generation, it ensures that when there are residual errors between polarization channels and / or spatial channels, the Polarized InSAR interferograms with better quality can be obtained
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0060] The present invention will be further described below in conjunction with the drawings.
[0061] Reference attached figure 1 The specific implementation steps of the present invention are as follows:
[0062] Step 1. Input image data.
[0063] Input the main image data and auxiliary image data respectively obtained by the main and auxiliary antennas of the polarization interference synthetic aperture radar into the system. The input main image data and auxiliary image data are the imaging results of the same area, so as to ensure the coherence between the main image and the auxiliary image.
[0064] Step 2. Rough image registration.
[0065] Using the InSAR coarse registration method, the main image and the auxiliary image are coarsely registered. In the process of image coarse registration, the registration accuracy is only required to reach the pixel level, which greatly reduces the difficulty of image coarse registration.
[0066] The specific steps of InSAR coarse registratio...
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
Login to View More Abstract
The invention discloses a polarized InSAR interferogram estimation method based on a generalized scattering vector, and mainly solves the problem that an existing polarized InSAR interferogram generating algorithm is unstable in registration error. The polarized InSAR interferogram estimation method is implemented in the following steps of (1) inputting image data, (2) roughly registering images, (3) establishing the generalized scattering vector, (4) selecting image windows, (5) estimating a generalized coherence matrix, (6) estimating a generalized interference matrix, (7) establishing an eigen decomposition matrix, (8) decomposing matrix eigens, (9) arranging eigen values, (10) generating interferometric phases, (11) judging whether all the interferometric phases are obtained, and (12) obtaining an interferometric phase diagram. The polarized InSAR interferogram estimation method based on the generalized scattering vector has the advantage of being capable of obtaining a high-quality interferogram even on the condition that a polarized channel and / or a space channel has registration errors, can effectively reduce influence of the registration errors on the interferogram, and fully utilizes all polarization information of each pixel.
Description
Technical field [0001] The present invention belongs to the field of communication technology, and further relates to a method for estimating the interferogram of a polarization interference synthetic aperture radar (Synthetic Aperture Radar Interferomety, InSAR) based on a generalized scattering vector in the field of radar detection technology. The invention performs generalized feature decomposition on the pixels in the radar image, and then weights the original interferogram to obtain the interference phase map. The invention can be used for the robust estimation of the polarized InSAR interferogram in the case of incomplete registration of the polarized channel and / or the spatial channel. Background technique [0002] Polarized InSAR is a research hotspot of modern radar. It not only maintains the measurement characteristics of InSAR, but also introduces the measurement advantages of polarized synthetic aperture radar (Synthetic Aperture Radar, SAR), so it can obtain the pol...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
Inventor 索志勇李真芳沙瑜刘艳阳杨桃丽
Owner XIDIAN UNIV