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Optical and SAR image registration method and equipment based on improved SIFT, and storage medium

An imaging and optical technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems that the resolution difference of SAR remote sensing images cannot be widely applied, and the results are not stable, so as to enhance uniqueness, ensure accuracy, Optimize the performance of matching results

Inactive Publication Date: 2018-11-30
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

Some scholars have improved the SIFT algorithm and applied it to the registration of optical and SAR images, but the results are sti

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  • Optical and SAR image registration method and equipment based on improved SIFT, and storage medium
  • Optical and SAR image registration method and equipment based on improved SIFT, and storage medium
  • Optical and SAR image registration method and equipment based on improved SIFT, and storage medium

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[0042] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0043] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0044] Such as figure 1 , method one: the realization method of the present invention comprises:

[0045] Step (1) Obtain the spaceborne optical and SAR images of the same area through systematic geometric correction;

[0046] Step (2) utilize DEM data to carry out terrain compensation correction to SAR image;

[0047] The DEM data used in this step is ASTER GDEM data with a resolution of 30 meters, which can be obtained for free.

[0048] Step (3) Utilize the geographic coordinates in the spatial...

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Abstract

The invention relates to the technical field of remote sensing image processing, in particular to an optical and SAR image registration method and equipment, and a storage medium. The optical and SARimage registration method comprises the steps that optical and SAR images are pre-processed; key points of the optical and SAR images are obtained through a classical SIFT algorithm, and main direction values of the key points are set; descriptor generating is conducted on the key points of the optical and SAR images through the classical SIFT algorithm; generated descriptors of the key points ofthe optical and SAR images are subjected to amplitude enhancement processing; the amplitude-enhanced descriptors of the key points of the optical and SAR images are matched by taking normalized crosscorrelation coefficients as similarity measure to obtain initial matching points; and finally, angle constraint and scale constraint purifying methods are simultaneously introduced to eliminate mismatching to obtain more optimized and more precise matching results.

Description

technical field [0001] The invention relates to the technical field of remote sensing image processing, in particular to an optical and SAR image registration method, device and storage medium. Background technique [0002] With the development of remote sensing image technology, a large number of synthetic aperture radar (SAR) and optical sensor systems have emerged, providing a variety of image data for earth observation in the same area. SAR images reflect good structural information, and have the advantages of all-weather, all-weather, and strong penetration. Compared with optical images, they have a larger reconnaissance range, but the images do not contain spectral information, and the microwave reflection characteristics of the target often lead to the same objects. The SAR images present different manifestations, and image interpretation is difficult. Optical images directly image the target, contain rich spectral information, and are more in line with human interpr...

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Application Information

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IPC IPC(8): G06T7/33G06K9/62
CPCG06T7/33G06T2207/10044G06F18/23213
Inventor 杨超丁庆王建涛梁景修曹春燕贺杰朱婷萼
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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