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Image fusion method for WorldView-2 remote sensing images

A worldview-2, remote sensing image technology, applied in the fusion of spaceborne multispectral and panchromatic images, can solve problems such as spectral distortion, achieve high spatial resolution, large changes in spectral coverage, and solve spectral information fidelity Effect

Inactive Publication Date: 2011-09-21
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the deficiency of varying degrees of spectral distortion in the fusion results of the various bands in the prior art, the present invention provides a novel multi-spectral and panchromatic image fusion method for WorldView-2 remote sensing images, combining eight-band multi-spectral The image is used together with the single-band panchromatic image as input, which not only improves the spatial resolution of the multispectral image in each band, but also maintains its spectral characteristics well.

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  • Image fusion method for WorldView-2 remote sensing images
  • Image fusion method for WorldView-2 remote sensing images
  • Image fusion method for WorldView-2 remote sensing images

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Embodiment Construction

[0048] Method embodiment: refer to figure 1 , using the real WorldView-2 remote sensing data package, including eight-band original multispectral images (Band1, Band2, ... Band8) and panchromatic images PAN. Among them, the spatial resolution of the multispectral image is 2m, and the size is 1150 rows×1151 columns, and the spatial resolution of the panchromatic image is 0.5m, and the size is 4600 rows×4604 columns. Such as figure 2 Shown, implementing the present invention comprises the following steps:

[0049] The first step of multispectral image enlargement

[0050] The original eight-band multispectral image (Band1, Band2, ..., Band8) is four times enlarged by the bicubic interpolation method, so that the enlarged multispectral image (B1, B2, ... B8) and The panchromatic image PAN has the same size, that is, 4600×4604.

[0051] The second step projection transformation

[0052] 1) The multispectral image matrix of each band is transformed into a column vector of 211...

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Abstract

The invention discloses an image fusion method for WorldView-2 remote sensing images, which comprises the following steps of: firstly, amplifying a multi-spectral image and projecting the amplified eight-waveband multi-spectral image to a component space; secondly, matching a component image with a full-color image in the statistic significance; and finally, carrying out projection inverse transformation to obtain a fusion result. According to the image fusion method, the problem on balancing the spectral information fidelity of the fusion result at each waveband and the spatial resolution is effectively solved.

Description

technical field [0001] The invention relates to an imaging processing method for remote sensing images, in particular to a fusion method for space-borne multispectral and panchromatic images. Background technique [0002] Due to the physical limitations of spaceborne sensors and the barriers to data transmission technology, current satellite image sensors can only provide multi-band multispectral images with high spectral resolution but low spatial resolution and multi-band multispectral images with high spatial resolution but low spectral resolution. Single-band panchromatic images. By fusing the multispectral image with the panchromatic image, a multispectral image with rich spectral information and improved spatial resolution can be obtained. [0003] The current multispectral image and panchromatic image fusion technology is mainly for the single-band panchromatic image and four-band multispectral image carried by IKONOS or QuickBird spaceborne sensors. However, the ne...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50
Inventor 李旭卫保国何明一
Owner NORTHWESTERN POLYTECHNICAL UNIV
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