SAR High Precision Registration Method Based on Nonlinear Scale Space and Radial Basis Function

A technology of scale space and basis function, which is applied in image data processing, image analysis, image enhancement, etc., to achieve the effects of improving robustness and high precision, increasing the number of feature points, and increasing the proportion

Inactive Publication Date: 2021-12-17
WUHAN UNIV
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Problems solved by technology

[0009] Few studies currently focus on local distortion modeling and fine registration for multi-band SAR

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  • SAR High Precision Registration Method Based on Nonlinear Scale Space and Radial Basis Function
  • SAR High Precision Registration Method Based on Nonlinear Scale Space and Radial Basis Function
  • SAR High Precision Registration Method Based on Nonlinear Scale Space and Radial Basis Function

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Embodiment Construction

[0053] In order to illustrate the present invention and / or the technical solutions in the prior art more clearly, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0054] The technical solution of the present invention is realized based on the following key technologies:

[0055] (1) Design a coherent speckle suppression strategy based on sparse representation to solve the influence of SAR image coherent speckle on the extraction of local feature points, reduce false local feature points, and increase the proportion of correct matching local feature points (ie inliers).

[0056] The speckle suppression strategy based on sparse representation designed by th...

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Abstract

The invention discloses a SAR high-precision registration method based on nonlinear scale space and radial basis function, which is used for the registration of multi-band SAR images, at least including: S100: perform sparse representation based on the reference image and the image to be registered respectively filtering; S200: Perform global registration based on the nonlinear model on the filtered reference image and the image to be registered to obtain feature matching point pairs; S300: Extract and match consistency detection for feature matching point pairs, and use random Sampling consistency method eliminates wrong matching points, and obtains the transformation matrix of global registration; S400: Perform local distortion modeling based on radial basis function on the globally registered image, and estimate local distortion model parameters, based on transformation matrix and local distortion The model is locally registered. The invention combines the nonlinear scale space and the radial basis function, and can improve the robustness and high precision of SAR image registration.

Description

technical field [0001] The invention relates to the technical field of automatic high-precision sub-pixel registration and fusion of remote sensing images and its application, in particular to a SAR high-precision registration method based on nonlinear scale space and radial basis function. Background technique [0002] With the development of earth observation technology, the emergence of high-resolution (meter-level, sub-meter-level), multi-platform (satellite, near-Earth space, airborne), multi-spectral (SAR, optical, multi-spectral) remote sensing images, many The temporal and spatial registration of source data and their fusion applications are already the most effective applications of remote sensing data. To realize the fusion of multi-sensor, multi-platform remote sensing image data, the key prerequisite is the high-precision (especially sub-pixel) automatic registration technology of multi-source remote sensing images. [0003] High-resolution synthetic aperture ra...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/33
CPCG06T7/33G06T2207/20016
Inventor 于秋则周珊
Owner WUHAN UNIV
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