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Boosting the Accuracy of Multispectral Image Pansharpening by Learning a Deep Residual Network

Yancong Wei,Qiangqiang Yuan,Huanfeng Shen,Liangpei Zhang

Published 2017 in IEEE Geoscience and Remote Sensing Letters

ABSTRACT

In the field of multispectral (MS) and panchromatic image fusion (pansharpening), the impressive effectiveness of deep neural networks has recently been employed to overcome the drawbacks of the traditional linear models and boost the fusion accuracy. However, the existing methods are mainly based on simple and flat networks with relatively shallow architectures, which severely limits their performance. In this letter, the concept of residual learning is introduced to form a very deep convolutional neural network to make the full use of the high nonlinearity of the deep learning models. Through both quantitative and visual assessments on a large number of high-quality MS images from various sources, it is confirmed that the proposed model is superior to all the mainstream algorithms included in the comparison, and achieves the highest spatial–spectral unified accuracy.

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