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Full-color multispectral image fusion method and system based on adaptive Gaussian filtering

A multi-spectral image and panchromatic image technology, applied in the field of full-color multi-spectral image fusion, can solve the problem of insufficient spatial information integration, and achieve the effects of strong spectral fidelity, improved spatial resolution, and high definition.

Active Publication Date: 2018-04-24
WUHAN UNIV
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Problems solved by technology

This algorithm has a good spectral preservation ability, but it also has the problem of insufficient spatial information integration.

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  • Full-color multispectral image fusion method and system based on adaptive Gaussian filtering
  • Full-color multispectral image fusion method and system based on adaptive Gaussian filtering
  • Full-color multispectral image fusion method and system based on adaptive Gaussian filtering

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Embodiment Construction

[0036] In order to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] An embodiment of the present invention is to fuse the panchromatic image Pan and the multispectral image MS after precise registration, refer to figure 1 , the steps of the embodiment of the present invention are as follows:

[0038] Step 1: Downsampling the panchromatic image, downsampling the panchromatic image to the same size as the original multispectral image based on the nearest neighbor or the corresponding mean value.

[0039] Embodiment The original panchromatic image Pan is down-sampled to obtain Pan ds , so that its size is consistent with the size of the original multispectral image MS, that is, size(Pan ds ) = size(MS).

[0040] Step 2: Calculate the average value and average gradient of each band of the downsampled panchromatic image and the original multis...

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Abstract

The invention proposes a full-color multispectral image fusion method and system based on adaptive Gaussian filtering, and the method comprises the steps: carrying out the downsampling of a full-colorimage till the size of the full-color image reaches the size of an original multispectral image; carrying out the statistical operation of the mean values and mean gradients of all bands of the downsampled full-color image and the original multispectral image, taking the mean value of the downsampled full-color image as the standard, and adjusting the mean value and mean gradient value of all bands of the multispectral image; carrying out the fitting calculation of the optimal parameters for the Gaussian filtering of the downsampled full-color image; carrying out the upsampling of the downsampled full-color image and the original multispectral image after filtering, carrying out the sampling till the size reaches the size of the original full-color image, obtaining an analog full-color image and an upsampled multispectral image, and carrying out the full-color multispectral fusion. The method enables the resolution to be high, enables the spectrum fidelity to be high, and is good in adaptability.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing data fusion, and relates to a panchromatic multispectral image fusion method and system based on adaptive Gaussian filtering. Background technique [0002] Compared with the panchromatic band, the spectral range of each band of the multi-spectrum is narrower, and the energy that the sensor can receive is less. In order to maintain a certain signal-to-noise ratio, a certain spatial resolution will be lost. Therefore, optical remote sensing satellites generally provide high-resolution panchromatic images and low-resolution multispectral images. Panchromatic and multispectral fusion technology can preserve the high-resolution features of panchromatic images, as well as the multi-band features of multispectral images, improving the ability to distinguish ground features and the scope of data applications. [0003] The key to panchromatic multispectral fusion is how to maximize...

Claims

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Application Information

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IPC IPC(8): G06T5/50
CPCG06T5/50G06T2207/10032G06T2207/20221
Inventor 王密何鲁晓
Owner WUHAN UNIV
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