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Remote-sensing image fusion method based on local correlation of light spectrum and space

A spatial correlation and remote sensing image technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as spectral distortion of fusion images, spectral distortion of fusion images, and insufficient solution accuracy of combination coefficients

Inactive Publication Date: 2015-03-25
WUHAN UNIV
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Problems solved by technology

However, for images that do not meet the spectral coverage conditions, SVR will cause spectral distortion of the fused image; in addition, for images that meet the spectral coverage conditions, the accuracy of the combination coefficient solution may be insufficient due to the uneven distribution of the types of features on the images , so that the synthesized panchromatic band (PAN) image does not match the reality, resulting in spectral distortion of the fusion image

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  • Remote-sensing image fusion method based on local correlation of light spectrum and space

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[0050] The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0051] The technical solution of the present invention can adopt computer software technology to realize the automatic operation process. Such as figure 1 As shown, the operation process of the embodiment includes the following steps:

[0052] Step 1, adaptively divide the image into blocks to obtain multiple image blocks, which can be recorded as block 1 、block 2 、block 3 ... for local treatment.

[0053] Step 2, for each image block, obtain the weight coefficient matrix in the block respectively, and the processing process for each image block includes the following steps,

[0054] Step 2.1, extract the high-frequency component G of each pixel in the panchromatic image s ;

[0055] Step 2.2, building a spectral and spatial correlation (SSC) model;

[0056] Step 2.3, using the non-negative least squares method to solve the weight...

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Abstract

The invention provides a remote-sensing image fusion method based on local correlation of light spectrum and space. According to the remote-sensing image fusion method based on the local correlation of the light spectrum and the space, a strategy of self-adaption partitioning local optimization is adopted, a whole image is partitioned, and then an observation model and a relevant fusion model are established in each image block; a weight coefficient matrix is solved by means of the non negative least square method in a light spectrum and space coherent image fusion model solving process, and the weight coefficient matrix is obtained after abnormal processing when a matrix is irreversible; a weight coefficient of each pixel is obtained after bilinear interpolation is carried out to a solved block weight coefficient matrix, and further an imitation low-resolution panchromatic image value of each pixel is obtained, and then fusion processing can be carried out pixel by pixel after the image value is put in the observation model. According to the remote-sensing image fusion method based on the local correlation of the light spectrum and the space, the original multispectral image space resolution ratio is improved, and simultaneously original spectral information can be effectively kept, and strong self-adaption processing capacity to an existing optical sensor is achieved.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing data fusion, and relates to a remote sensing image fusion method based on spectral and spatial local correlation. Background technique [0002] With the development of earth observation technology, most earth observation satellites such as: Landsat-7, Spot5, IKONOS, QuickBird, GeoEye-1, and WorldView-2 can simultaneously provide multispectral images with high spectral resolution and high spatial resolution full-color images. In order to make full use of spectral and spatial characteristics, remote sensing image fusion technology has been developed rapidly. [0003] Remote sensing image fusion technology refers to the image processing process that integrates the advantages of high spatial resolution panchromatic image and high spectral resolution multispectral image to generate a color image with high spatial and spectral resolution. [0004] The current remote sensing ima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/50
Inventor 王慧贤江万寿
Owner WUHAN UNIV
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