Pan-sharing method based on shear wave transformation

A shear wave and image technology, applied in the field of pan-sharpening based on shear wave transform, to achieve the effect of good spectral resolution and good visual effect

Active Publication Date: 2021-03-16
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, the wavelet method is not perfect. A lot of practice shows that wavelet is mainly suitable for expressing isotropic singularity objects. For anisotropic singularity objects, such as boundaries and linear features in digital images Wait, wavelet is not a very good representation tool

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  • Pan-sharing method based on shear wave transformation
  • Pan-sharing method based on shear wave transformation
  • Pan-sharing method based on shear wave transformation

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Embodiment Construction

[0029]The invention mainly introduces the application of shearlet transform in the fusion of high spatial resolution panchromatic image (PAN) and low spatial resolution multispectral image (MS). It is a pan-sharpening method based on shearlet transform, which combines the spatial spectral information of high spatial resolution panchromatic image (PAN) and low spatial resolution multispectral image (MS) to obtain a high spatial resolution multispectral images (HRMS).

[0030] First, assuming that the PAN image is obtained by spectral mapping to obtain a SPAN image, the MS image is up-sampled to obtain a UMS image with the same size as the PAN image, and the obtained SPAN image and the UMS image obtained by up-sampling the MS image are subjected to shearlet decomposition to obtain the original The high and low frequency subband coefficients of the image are then fused according to the corresponding high and low frequency fusion rules, and the fusion coefficient image obtained af...

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Abstract

The invention discloses a panshearing method based on shear wave transformation. The panshearing method comprises the following steps of: obtaining a panshearing matrix; according to the method, obtaining a multispectral image (HRMS) with high spatial resolution by combining spatial spectrum information of a panchromatic image (PAN) with high spatial resolution and a multispectral image (MS) withlow spatial resolution. The core of the method is two-step shear wave domain image fusion. The fusion process is carried out in two steps, and each step is carried out in a shear wave domain. According to the method, on the basis of a traditional pansharing method, the spatial structure information of the PAN image and the spectral information of the MS image are utilized, the spectral and spatialrelationship between the high-resolution PAN image, the low-resolution PAN image and the MS image is fully mined, and a fused image with spectral fidelity and rich spatial details is obtained throughorganic fusion of the information.

Description

technical field [0001] The invention belongs to the technical field of image fusion, in particular to a pan-sharpening method based on shearlet transform. Background technique [0002] In the design of optical remote sensing systems, there is a critical trade-off between spatial resolution, spectral resolution, and signal-to-noise ratio due to the limited incident energy. For this reason, multispectral image sensors can usually only obtain multispectral images with lower spatial resolution or panchromatic images with high spatial resolution. But in many applications, such as image classification, object detection, scene interpretation, and spectral unmixing, multispectral images with high spatial resolution are required. Therefore, the goal of pan-sharpening methods is to fuse spatial and spectral information to produce multispectral images with the required high spatial resolution. [0003] At present, there are many pan-sharpening methods for remote sensing images, inclu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50G06F17/14G06T3/00
CPCG06T5/50G06F17/148G06T2207/20221G06T3/02
Inventor 刘红毅蒋文赵肖飞张军吴泽彬韦志辉
Owner NANJING UNIV OF SCI & TECH
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