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Remote sensing image fusion method combining guided filtering and IHS transformation

A remote sensing image fusion and guided filtering technology, applied in the field of image fusion for remote sensing multispectral images and panchromatic images, can solve the problems of spatial distortion, spectral distortion, and multispectral image mismatch of fused images, avoiding excessive insertion, The effect of high spectral resolution, enhanced spatial resolution

Pending Publication Date: 2019-07-09
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Classic component replacement methods include HIS (Intensity-Hue-Saturation) transformation, GS (GramSchmidt) transformation, PCA (Principal Component Analysis) transformation, etc. Due to the complex spectral response between panchromatic images and multispectral images, component replacement methods will be accompanied by severe spectral distortion
Classical multi-scale analysis methods include ATWT (àtrous wavelet transform) and Laplacian Pyramid, etc. The spatial details extracted by such methods may not match the multispectral image, so there is a certain spatial distortion in the fused image.

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  • Remote sensing image fusion method combining guided filtering and IHS transformation
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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and embodiment the present invention is further described, and the present invention includes but not limited to following embodiment.

[0025] The present invention comprises the following steps:

[0026] Assuming the original multispectral image (MS i ) contains N bands, and the subscript i=1,2,...,N indicates the i-th band of the corresponding multi-band image.

[0027] The first step, upsampling multispectral image

[0028] The bicubic interpolation method is used to upsample the original multispectral image to obtain an upsampled multispectral image matching the panchromatic image, which is denoted as MS i .

[0029] The second step is to calculate the intensity component I of the multispectral image

[0030] Computing the intensity component I, I can be obtained by suitably upsampling the multispectral image MS i The linear combination model of is estimated to get:

[0031]

[0032] Among them, the linear com...

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Abstract

The invention provides a remote sensing image fusion method combining guided filtering and IHS transformation. The method comprises steps of carrying out image fusion by adopting a detail injection model; performing multi-scale guided filtering on the preprocessed image to obtain detail information; designing a corresponding insertion coefficient; and finally, inserting detail information into theup-sampled multispectral image to obtain a fused image, wherein the fused image retains the spectral resolution of the original multispectral image, has higher spatial resolution, and is an effectivefusion method suitable for fusion of the high-resolution remote sensing multispectral image and the panchromatic image.

Description

technical field [0001] The present invention relates to the visual enhancement processing technology of remote sensing images, especially the image fusion method for remote sensing multispectral images and panchromatic images Background technique [0002] Due to technical limitations such as the physical characteristics of the sensor, the current remote sensing images cannot obtain high spatial resolution and high spectral resolution at the same time. If a higher spectral resolution is obtained, a certain high spatial resolution is often sacrificed, and vice versa. . In order to solve this problem, remote sensing platforms often need to be equipped with sensors with different characteristics to obtain panchromatic images with high spatial resolution and multispectral images with high spectral resolution respectively to form complementary image data sets. Remote sensing images with high spatial resolution and high spectral resolution can be obtained by processing complementa...

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Application Information

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IPC IPC(8): G06T5/50G06T7/30
CPCG06T5/50G06T7/30G06T2207/10036G06T2207/20221G06T2207/20024
Inventor 霍英海楚恒王汝言向泽君
Owner CHONGQING UNIV OF POSTS & TELECOMM
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