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Real-virtual relating method for generating interference phase pattern of synthetic aperture radar without interference spots

A technology of synthetic aperture radar and interferometric phase diagram, which is applied in the field of remote sensing measurement and image processing technology

Inactive Publication Date: 2005-10-12
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0011] The technical problem to be solved by the present invention is, aiming at the defects existing in the prior art, in the interferometric synthetic aperture radar data processing process, the real and imaginary part correlation method of the fringe contour window and the rectangular window real and imaginary part correlation method are used to replace the traditional Conjugate multiplication method to generate an interferometric phase map completely free from coherent speckle noise from two accurately registered complex images

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  • Real-virtual relating method for generating interference phase pattern of synthetic aperture radar without interference spots
  • Real-virtual relating method for generating interference phase pattern of synthetic aperture radar without interference spots
  • Real-virtual relating method for generating interference phase pattern of synthetic aperture radar without interference spots

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Embodiment Construction

[0054] 1. Obtain two coherent SAR complex image data and accurately register them;

[0055] 2. For each pixel corresponding to the two complex images, take the current point as the center, take a window with a size of m×n (it can be a striped contour window, or a rectangular or other form of window), in Correlation operation is performed on the real part (or imaginary part) of the two complex image data in the window to find the correlation coefficient C 1 ;

[0056] 3. Use the same method to perform correlation calculations on the real part of the first complex image data and the imaginary part of the second complex image data to obtain its correlation coefficient C 2 , or perform a correlation operation on the imaginary part of the first complex image data and the real part of the second complex image data to find the correlation coefficient -C 2 , and then get C 2 ;

[0057] 4. to C 2 with C 1 The interferometric phase image can be obtained by calculating the arctange...

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Abstract

A correlation method of real part and imaginary part in interference phase map includes using isoline window in size of m x n to carry out correlation operation for real part and imaginary part data of two complex maps for deriving out correlation coefficient C1, utilizing the same manner to drive out C2 by carrying out correlation operation for real part of the first complex map data and for imaginary part of the second complex map data, deriving out arc tangent for obtaining interference phase map by utilizing ratio of C1 and C2; using two accurate complex maps to generate interference phase map being free from coherent speckle noise.

Description

technical field [0001] The invention relates to the fields of image processing technology, remote sensing measurement, etc., and further refers to a fringe contour window real and imaginary part correlation method and a rectangular window real and imaginary part correlation method for generating an interferometric synthetic aperture radar interferometric phase map. Background technique [0002] Interferometric Synthetic Aperture Radar (Interferometric Synthetic Aperture Radar, abbreviation: InSAR or IFSAR) 3D imaging technology is a newly developed space observation technology, which is a combination of traditional Synthetic Aperture Radar (Synthetic Aperture Radar, abbreviation: SAR) remote sensing technology and radio astronomy interferometry. The product of technology integration. Interferometric synthetic aperture radar technology uses two antennas to observe simultaneously or a pair of antennas to observe twice in parallel to receive the echo signals of ground targets, ...

Claims

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Application Information

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IPC IPC(8): G01B11/25G01S13/90G06T5/50G06T7/00
CPCG01S13/90G01S13/9023
Inventor 于起峰伏思华
Owner NAT UNIV OF DEFENSE TECH
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