SAR image and visible light image registration method based on structural condition mutual information

A conditional mutual information and image registration technology, which is applied in the field of remote sensing image processing, can solve problems such as low precision, large noise, and unstable registration results, and achieve the effects of improving accuracy, improving stability, and reducing possibilities

Active Publication Date: 2018-09-11
XIDIAN UNIV
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[0003] S. Suri et al published the paper "Mutual-information-based registration of TerraSAR-X and Ikonos imagery in urban areas" ("IEEE TRANSACTIONS ONGEOSCIENCE AND REMOTE SENSING" article number: 0196-2892 (2010) 48-0939-10 ) uses histogram segmentation to extract part of the information in the image to calculate the mutual information, without affecting the registration accuracy, it improves the registration speed of large-scale SAR images and visible light images, but this method is more noisy and gray Images with large degree differences cannot obtain stable re

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  • SAR image and visible light image registration method based on structural condition mutual information
  • SAR image and visible light image registration method based on structural condition mutual information
  • SAR image and visible light image registration method based on structural condition mutual information

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[0030] Below in conjunction with accompanying drawing and example technical scheme of the present invention and effect are described further:

[0031] refer to figure 1 , the implementation steps of the present invention are as follows.

[0032] Step 1, set the reference image and the image to be registered.

[0033] Input two measured images that need to be registered, that is, the visible light image and the SAR image, and the visible light image is used as the reference image V, and the SAR image is used as the image S to be registered.

[0034] Step 2, respectively filter the phase consistency information of the reference image V and the image to be registered S to obtain the filtered phase consistency information C of the reference image V and the phase consistency information C of the image to be registered S .

[0035] Commonly used filtering methods include mean filtering, median filtering, non-local mean filtering, etc. This example uses, but is not limited to, th...

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Abstract

The invention discloses an SAR image and visible light image registration method based on structural condition mutual information. The problem that the existing technology is unstable and the registering precision is low is mainly solved. The method comprises the following steps of 1) inputting a reference image and a to-be-registered image; 2) respectively calculating the phase consistency information processed by the non-local mean filtering algorithm of the reference image and the image to be registered; 3) respectively calculating the reference image and the phase consistency information of the image to be registered; 4) calculating the reference image and the phase consistency information of the image to be registered according to the reference image and the phase consistency information of the image to be registered; 5)recording the conversion parameters corresponding to the maximum mutual information of the structure conditions under the determination of the search space; 6)transforming the image to be registered by utilizing the conversion parameters, and obtaining a registration result. The method is stable in registration, high in registration precision and capable of being used for remote sensing image fusion and change detection.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing, and further relates to a registration method of a SAR image and a visible light image, which can be used for remote sensing image fusion and change detection. Background technique [0002] Remote sensing image registration is the spatial geometric transformation of two or more images at different times, different fields of view, and different imaging modes, so that each image can be geometrically matched and corresponding. Its main purpose is to reduce or eliminate the geometric deformation between the reference image and the image to be registered, and it has a wide range of applications in remote sensing image fusion and other fields. [0003] S. Suri et al published the paper "Mutual-information-based registration of TerraSAR-X and Ikonos imagery in urban areas" ("IEEE TRANSACTIONS ONGEOSCIENCE AND REMOTE SENSING" article number: 0196-2892 (2010) 48-0939-10 ) uses hist...

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Application Information

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IPC IPC(8): G06T3/00G06T5/00G06T5/50
CPCG06T3/0068G06T5/002G06T5/50G06T2207/10032
Inventor 吴艳于丰党倩楠曹宜策李明
Owner XIDIAN UNIV
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