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Optical image and SAR image registration method based on multi-scale phase consistency

An optical image and image registration technology, applied in remote sensing image and target recognition detection, image processing, computer vision fields, can solve the problems of low nonlinear strength robustness, long registration time, etc., to improve registration speed, Improve registration accuracy and overcome time-consuming effects

Pending Publication Date: 2022-05-13
XIDIAN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and propose a registration method for optical images and SAR images based on multi-scale phase consistency, which is used to solve the registration process of optical images and SAR images existing in the prior art Low robustness to nonlinear intensity differences and long registration time-consuming technical problems

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  • Optical image and SAR image registration method based on multi-scale phase consistency
  • Optical image and SAR image registration method based on multi-scale phase consistency
  • Optical image and SAR image registration method based on multi-scale phase consistency

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Embodiment Construction

[0041] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:

[0042] refer to figure 1 , the present invention comprises the following steps:

[0043] Step 1, select the reference image and the image to be registered:

[0044] Take an optical image with a resolution of M×N as the reference image I o , and take a SAR image of the same size as the image to be registered I s , where, M≥512, N≥512.

[0045] Step 2, construct reference image I o The multi-scale detail enhancement Gaussian pyramid and the image to be registered I s The multi-scale detail enhancement Gaussian pyramid:

[0046] Step 2a, for the reference image I o and the image to be registered I s Log separately 2 Gaussian blur of min(M,N) scales to obtain the reference image I of layer l o The multiscale Gaussian pyramid of J o (x,y,σ o ) and the image to be registered I of layer l s The multiscale Gaussian pyramid of J s (x,y,σ ...

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Abstract

The invention discloses an optical image and SAR (Synthetic Aperture Radar) image registration method based on multi-scale phase consistency, which aims at improving the image registration precision, and comprises the following implementation steps: 1, respectively selecting an optical image as a reference image and an SAR image as an image to be registered; 2, respectively constructing multi-scale detail enhanced Gaussian pyramids of the reference image and the image to be registered; 3, respectively carrying out phase consistency edge detection on the multi-scale detail enhanced Gaussian pyramids of the reference image and the to-be-registered image, and generating multi-scale PC feature maps of the reference image and the to-be-registered image; 4, performing Harris feature point detection on the multi-scale PC feature map of the reference image; 5, matching the reference templates of the Harris feature points with the corresponding templates to be matched by using an NCC registration algorithm to obtain accurate matching point pairs; and 6, calculating spatial transformation parameters according to the matching point pairs, and performing spatial transformation on the to-be-registered image to obtain a registered image. According to the method, the optical and SAR image registration efficiency can be effectively improved, and rapid and robust registration is realized.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to an image registration algorithm, in particular to a multi-scale phase consistency-based optical image and SAR (Synthetic Aperture Radar) image registration method, which can be applied to computer vision, remote sensing images and Target recognition and detection and other fields. Background technique [0002] Image registration is a very critical step in image processing applications. It is a process of matching two images acquired at different times, different sensors (imaging devices) or under different conditions (weather, illuminance, camera position and angle, etc.) . Image registration technology has a wide range of applications in many fields, such as computer vision, object recognition and detection, image fusion and pattern recognition. [0003] The optical imaging system is the earliest developed, and the technology is relatively the most mature, and the optic...

Claims

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Application Information

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IPC IPC(8): G06T7/33
CPCG06T7/33G06T2207/10004G06T2207/10044G06T2207/30181
Inventor 丁金闪孙慧明姜明徐众
Owner XIDIAN UNIV