Abstract
Single Image Super Resolution (SISR) elevates spectral and spatial image resolution beyond the sensor capabilities. Convolutional Neural Networks (CNNs) have dominated current mainstream approaches. However, the utilization of pixel-based loss function hinders achieving realistic perceptual results at large upscale factors. Recently, Generative Adversarial Network (GAN) attained more realistic, crisp results in natural image, but the complex nature of satellite images limits the performance. In this work, we address these challenges equipped with the promising results of Squeeze-and-Excitation (SE) in classification tasks. A Spatial and Channel Squeeze-and-Excitation GAN (SCSE-GAN) is introduced. The proposed generator stacked SCSE block after each residual block to recalibrate and ensure features flow and amplify high-frequency details. In addition, skip/residual connection was utilized in the GAN generator network to further boost the performance. Wasserstein distance with gradient penalty (WGAN-GP) was adopted to stabilize training and avoid gradient vanishing phenomena. Finally, we conducted various experiments on two open-source benchmarks namely: RSSCN7 and Kaggle datasets, to systematically evaluate the proposed framework performance. According to the obtained results, the proposed approach excels other approaches quantitatively and visually. Quantitatively, the results show a boost by a considerable margin of 2%, and 3% in terms of Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity Index Measure (SSIM), respectively. Visually, the proposed method shows a sharper, less smooth image compared with benchmark SISR approaches.
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Moustafa, M.S., Sayed, S.A. Satellite Imagery Super-Resolution Using Squeeze-and-Excitation-Based GAN. Int. J. Aeronaut. Space Sci. 22, 1481–1492 (2021). https://doi.org/10.1007/s42405-021-00396-6
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DOI: https://doi.org/10.1007/s42405-021-00396-6