Remote sensing image reconstruction method and device cooperating with space channel attention and dynamic frequency domain multi-scale fusion

Through the remote sensing image reconstruction method that integrates the attention of the space channel and the dynamic frequency domain multi-scale fusion, the data loss problem caused by cloud occlusion in Sentinel-2 images is solved, and high-precision image reconstruction and resolution improvement are achieved, meeting the needs of agricultural and ecological monitoring.

CN120339436AActive Publication Date: 2025-07-18ZHEJIANG UNIV
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Patent Information

Application Number
CN202510463260.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-14
Publication Date
2025-07-18
Estimated Expiration
2045-04-14

AI Technical Summary

Technical Problem

The prior art is difficult to effectively fill the lack of Sentinel-2 image data caused by cloud occlusion and other factors, especially in the key growth stage in the agricultural field, which affects continuous time series monitoring, and heterologous image fusion has problems with acquisition geometry, spectral characteristics and spatial resolution differences.

Method used

The remote sensing image reconstruction method that integrates the attention and dynamic frequency domain multi-scale fusion of collaborative spatial channel attention and multi-scale fusion of dynamic frequency domains is adopted. By constructing a training model, the time embedding layer, multi-scale convolution module, enhanced attention module and upsampling module of Landsat-8 images and Sentinel-2 images are used to reconstruct Sentinel-2 images, especially the red edge band, taking into account dynamic changes in the surface and spatial heterogeneity.

Benefits of technology

High-precision reconstruction of Sentinel-2 images is realized, which fills in data loss, improves the complete timing and resolution of the images, and provides more accurate data support, especially in the fields of agricultural and ecological monitoring.

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Abstract

The invention discloses a remote sensing image reconstruction method and device cooperating with spatial channel attention and dynamic frequency domain multi-scale fusion, and the method comprises the steps: carrying out the decomposition, fusion and reconstruction of a frequency spectrum of a down-sampling feature in an attention enhancement module, thereby enhancing the expression of high-frequency information through the extraction of a frequency domain feature; according to the method, the Landsat-8 image slice sample set with month information is taken as the training sample set, the month information in the training sample is embedded into the Landsat-8 image data through the time embedding layer to obtain a comprehensive feature map including time and space for training, and thus the influence of dynamic change of the earth surface is considered. Through the two points, image data missing caused by factors such as cloud layer shielding can be filled, meanwhile, the red edge wave band of Sentinel-2 is reconstructed, and more accurate and comprehensive data support is provided for the fields of agriculture, ecological monitoring and the like.
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