Image fusing method based on multidirectional gradient field

An image fusion, multi-directional technology, applied in the field of remote sensing image processing, can solve the problems of three-channel image fusion, loss of spatial details, etc., to achieve the effect of solving memory usage and reducing computational complexity
CN102609930BActive Publication Date: 2014-06-18INST OF AUTOMATION CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF AUTOMATION CHINESE ACAD OF SCI
Publication Date
2014-06-18

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Abstract

The invention discloses a high-quality method for rapidly fusing a multi-spectrum image and a full-color image. The method comprises the following steps of: keeping detailed information of the full-color image through a multidirectional gradient operator and utilizing a lower sampling operator to keep multispectral color information, so as to obtain a multispectral image with a high resolution ratio. Furthermore, a complicated space domain is calculated and converted into a frequency domain through equivalent conversion; not only can the occupation of an internal memory of a computer be reduced, but also the operation complexity is reduced, so that real-time calculation can be realized. The high-quality method for rapidly fusing the multi-spectrum image and the full-color image, disclosed by the invention, solves the difficult problem that the existing image fusing method cannot simultaneously keep both detail information of the full-color image and detail information of the multi-spectrum image; and with the adoption of the method disclosed by the invention, the space resolution ratio and the spectral resolution ratio of the fused image are simultaneously optimized.
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Description

technical field

[0001] The invention belongs to the field of remote sensing image processing, in particular to a fusion method of a panchromatic image and a multi-spectral image based on a multi-directional gradient field. 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 spatial resolution) to obtain high spatial resolution multispectral image. method. Summarizing the existing image fusion methods, they can be divided into three categories:

[0003] ...

Claims

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