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Image fusion method based on gradient field and scale space theory

A scale space and gradient field technology, applied in the field of remote sensing image processing, can solve the problems of spatial detail loss, three-channel image fusion, etc., and achieve the best spatial resolution and spectral resolution.

Inactive Publication Date: 2012-11-21
北京市遥感信息研究所 +1
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Problems solved by technology

The implementation principle of the method based on color space conversion is simple, but there are two problems in this method based on color space conversion: (1) it is only suitable for three-channel image fusion; (2) although the brightness channel is directly replaced by a panchromatic image , but the hue channel and saturation channel are still simple upsampling of the original multispectral information, which will inevitably lead to the loss of spatial details
How to obtain high-quality high-resolution multispectral images from existing panchromatic images and multispectral images is still a challenging problem in the field of remote sensing image processing

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  • Image fusion method based on gradient field and scale space theory
  • Image fusion method based on gradient field and scale space theory
  • Image fusion method based on gradient field and scale space theory

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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be pointed out that the described examples are only intended to facilitate the understanding of the present invention, and do not have any limiting effect on it. The method used in the present invention can be installed and executed in the form of software on personal computers, industrial computers and servers, and can also be embodied in the form of embedded chips in the form of hardware.

[0027] figure 1 A flowchart of a method for fusing visible light panchromatic images and multispectral images based on gradient field and scale space theory according to an embodiment of the present invention is given. The method includes the following steps:

[0028] Step S1: using the gradient field method to make the fusi...

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Abstract

The invention discloses a method for fusing a visible light full-color image and a multispectral image based on a gradient field and a scale space theory. The method comprises the steps of keeping a fusing image and the visible light full-color image consistent in a gradient domain by a gradient field method so as to construct an energy function keeping the details of the full-color image, regarding the fusing image as a high-resolution image of the low-resolution multispectral image by an image scale space theory so as to construct an energy function keeping the spectra of the multispectral image, combining the energy keeping the details of the full-color image and the energy keeping the spectra of the multispectral image to construct a global objective function, and optimizing a target function by a conjugate gradient method to obtain the fused image. According to the method disclosed by the invention, the spatial resolution and the spectral resolution of the fused image can be optimized simultaneously.

Description

technical field [0001] The invention relates to the technical field of remote sensing image processing, in particular to a method for fusing visible light panchromatic images and multispectral images based on gradient field and scale space theory, which is used for visible light panchromatic images and multispectral images acquired by aerospace and aviation sensor platforms. Fusion of spectral images. Background technique [0002] In the field of remote sensing image processing, for optical sensors, the spatial resolution and spectral resolution of images are a pair of contradictory factors. To obtain images with high spatial resolution you can only work with a single spectrum, and to obtain more spectra you have to reduce the spatial resolution. In order to improve the spatial resolution and spectral resolution of the image at the same time, it is proposed to use the fusion of panchromatic image (high spatial resolution single spectral image) and multispectral image (low s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50
Inventor 郭建恩王颖张秀玲潘春洪李京龙
Owner 北京市遥感信息研究所
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