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Multispectral image fusion method based on adaptive spectrum-spatial gradient sparse regularization

A multi-spectral image and spatial gradient technology, applied in the field of image fusion, can solve problems such as not considering the relationship between the spectra of multi-spectral images

Active Publication Date: 2019-06-07
WUHAN UNIV
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Problems solved by technology

This method better expresses the relationship between fusion image, multispectral image and panchromatic image, but does not take into account the relationship between the spectra of multispectral images.

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  • Multispectral image fusion method based on adaptive spectrum-spatial gradient sparse regularization

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[0066] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0067] Such as figure 1 As shown, a kind of multispectral image fusion method based on adaptive spectral-spatial gradient sparse regularization provided by the present invention comprises the following steps:

[0068] Step 1. Obtain the registered multispectral image M and panchromatic image P in the same geographic area at the same time. Let the multispectral image be Panchromatic image is P ∈ R m×n , the fused image is Where m, n represent the number of rows and columns of the image, b represents the number of spectra of the image, and c represents the...

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Abstract

The invention discloses a multispectral remote sensing image and panchromatic image fusion method based on adaptive spectrum-spatial gradient sparse regularization. The method comprises the followingsteps: step 1, obtaining the multispectral image and the panchromatic image which are registered in the same geographic area at the same time; step 2, based on the result of the step 1, performing down-sampling on the fused image to obtain l2 norms of the fused image and the multispectral image; 3, calculating the gradient and the weight matrix of the difference image of the fused image and the copied panchromatic image in the spatial and spectral directions so as to obtain the l1 norm of the fused image and the panchromatic image; and step 4, based on the step 2 and the step 3, obtaining energy functions of the fused image, the multispectral image and the panchromatic image, and carrying out iterative solution to obtain a fused image. The method mainly aims at the application requirementof fusion of the multispectral remote sensing image and the panchromatic image, and the spectral consistency characteristic and the spatial gradient sparsity characteristic of the multispectral imageare considered.

Description

technical field [0001] The invention belongs to the technical field of image fusion, and relates to a full variation regularization image fusion method, in particular to a multispectral image fusion method based on adaptive spectral-spatial gradient sparse regularization, which is applicable to multispectral remote sensing images and panchromatic Fusion of images. Background technique [0002] The image data of multi-spectral remote sensing images contains spectral images of multiple bands. The combination of different spectra can easily discover information that cannot be observed from panchromatic images. It is widely used in environmental monitoring, precision agriculture, mineral exploration and other fields. In general, multispectral images have higher spectral resolution and lower spatial resolution, while panchromatic images have lower spectral resolution and higher spatial resolution. Obviously, less spatial information is obtained using only multispectral images. ...

Claims

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Application Information

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IPC IPC(8): G06T5/50
Inventor 田昕张蒙亮李松王玥马跃
Owner WUHAN UNIV
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