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Area-based remote sensing image registration method

A remote sensing image and area technology, applied in the field of image processing, can solve the problem of image gray level difference and remote sensing image cannot be registered, and achieve the effect of high registration accuracy

Active Publication Date: 2016-06-08
XIDIAN UNIV
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Problems solved by technology

Although the two methods can register most remote sensing images, they cannot be registered for some remote sensing images that have large differences in image grayscale due to differences in shooting time, spectrum and image sensors.

Method used

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] Refer to attached figure 1 , the realization steps of the present invention are as follows.

[0029] Step 1, input remote sensing image pair.

[0030] Two remote sensing images are acquired by the sensor, namely the reference image I and the image J to be registered.

[0031] Step 2, establish a Gaussian scale space.

[0032] (2a) Use the following formula to calculate the scale values ​​of each layer of the Gaussian scale space of the reference image I and the image J to be registered respectively:

[0033] σ i = σ 0 · c (i-1)

[0034] Among them, σ i is the scale value of the i-th layer, i=1,2...,8,σ 0 is the scale value of the first layer, σ 0 =1.6, c is the scale ratio of each layer, the value is 2 1 / 3 ;

[0035] (2b) Use the scale value σ of each layer i Perform Gaussian filtering on the reference image I and the image J to be registe...

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Abstract

The invention discloses an area-based remote sensing image registration method, and mainly solves the problems that registration of multispectral images with high image gray scale difference cannot be performed by existing algorithms. The technical scheme is that 1. a Gaussian scale space is established for a reference image and an image under registration respectively; 2. a sketch graph of the reference image and the image under registration is generated respectively; 3. the Gaussian scale space graphs and the corresponding sketch graphs of the reference image and the image under registration generate respective structural areas and non-structural areas; 4. the features points of the structural areas and the non-structural areas are detected; 5. the features points of the two structural areas of the reference image and the image under registration are added; 6. descriptors of the added feature points are obtained by using an SIFT algorithm, and registration parameters are obtained by utilizing the feature points descriptors; and 7. affine transformation is performed on the image under registration by utilizing the registration parameters so that a registration result is obtained. Registration of multi-source and multispectral remote sensing images with high gray scale difference can be realized.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a region-based remote sensing image registration method in the technical field of remote sensing image registration processing, which can be applied to the registration of multi-source and multi-spectral remote sensing images with large gray scale differences. Background technique [0002] Image registration is one of the key technologies in remote sensing image processing, target recognition, image reconstruction, robot vision and other fields, and is the basis of multi-sensor image fusion. There are often spatial transformation relationships such as offset, rotation, and scale between the images to be fused. Image registration is to obtain the same scene from the multi-spectrum, multi-band or the same sensor at different time phases and different orientations of the same scene collected by different sensors. Transforming the images into the same coordinate system for fus...

Claims

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Application Information

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IPC IPC(8): G06T3/00
CPCG06T2207/10032G06T3/14
Inventor 马文萍郑亚飞焦李成马晶晶闻泽连
Owner XIDIAN UNIV
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