Polarimetric SAR image matching method and apparatus based on orientation angle inversion

A matching method and a technology of a matching device, which are applied in image enhancement, image analysis, image data processing, etc., can solve problems such as strong speckle noise, wrong key points, and matching failure, and achieve reduced matching time, high operational stability, and The effect of low computational complexity

Active Publication Date: 2015-10-07
TSINGHUA UNIV
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Problems solved by technology

Due to the strong speckle noise in the SAR image, the SIFT algorithm is easy to get wrong key points, resulting in matching failure
For non-homologous SAR images, the matching rate is often very low, which is also an important problem faced by the SIFT algorithm in SAR scene matching

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  • Polarimetric SAR image matching method and apparatus based on orientation angle inversion
  • Polarimetric SAR image matching method and apparatus based on orientation angle inversion
  • Polarimetric SAR image matching method and apparatus based on orientation angle inversion

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Embodiment Construction

[0037] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0039]In the present inventio...

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Abstract

The present invention discloses a polarimetric SAR (Synthetic Aperture Radar) image matching method and apparatus based on orientation angle inversion. The method comprises the following steps: obtaining DEM (Digital Elevation Model) data and polarimetric SAR data; performing inversion according to the DEM data, so as to obtain a first orientation angle; performing inversion according to the polarimetric SAR data, so as to obtain a second orientation angle; respectively performing visualization processing for the first orientation angle and the second orientation angle; and matching the first orientation angle and the second orientation angle through a BFSIFT algorithm after the visualization processing. According to the polarimetric SAR image matching method in an embodiment of the present invention, a polarimetric SAR image is matched with a DEM based on orientation angle inversion, thus matching time is shortened, and operation accuracy is improved, therefore, the polarimetric SAR image matching method not only has low operational complexity, but also has high operation stability.

Description

technical field [0001] The invention relates to the technical field of scene matching guidance, in particular to a polarimetric SAR image matching method and device based on orientation angle inversion. Background technique [0002] The existing SAR (Synthetic Aperture Radar, Synthetic Aperture Radar) image matching algorithms have poor matching results for mountainous areas. Since SAR is a side-looking oblique range imaging, when the ground has height fluctuations, the range image will have geometric distortions such as shortening of the front slope, stretching of the back slope, shadows, and top-bottom inversion. Therefore, when the ground height of the imaging area of ​​the two SAR images fluctuates greatly and the imaging geometry is different, there will be serious geometric deformation between the two, and sometimes the human eye cannot even recognize the same area. This phenomenon is particularly serious in low-altitude imaging, which brings great difficulties to SAR...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T2207/10044
Inventor 杨健许彬马文婷殷君君
Owner TSINGHUA UNIV
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