Abstract
An emergency risk assessment by collecting disaster-affected images via unmanned aerial vehicles is the current norm. Reasonable rescue planning and resource allocation depend on a quick and precise semantic interpretation of natural disaster images. However, the poor image quality produced by various technological and environmental factors and complex scenarios associated with disaster-affected regions makes the classification operation challenging. In order to get in-depth spatial features for decoding the intricate textures associated with catastrophe images, this study proposes an implementation of the CNN-based multibranch feature extraction technique. An advanced mixed-attention mechanism is exploited to extract the highly essential features. This mixed-attention mechanism effectively overcomes the flaws generated by traditional convolution by neglecting the global information and focusing on local key features. An SRGAN-based super-resolution method is utilized to acquire high-resolution images with rich spatial details to enhance the quality of aerial images. Besides, we experiment with several existing image classification algorithms, such as the ensemble model of pre-trained networks, the capsule network model, and the stacked autoencoder. Finally, we perform a comparative analysis between all the deployed models to obtain the best-performing classifier. Our proposed multibranch feature extraction with mixed-attention mechanism-based network performs more superiorly among the four models due to its ability to extract highly relevant features from disaster images. Generated super-resolution images effectively increase the classification performance. Our research findings and approaches accommodate quality resources for disaster image quality enhancement and classification activities.
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Bhadra, P., Balabantaray, A. & Pasayat, A.K. MFEMANet: an effective disaster image classification approach for practical risk assessment. Machine Vision and Applications 34, 76 (2023). https://doi.org/10.1007/s00138-023-01430-1
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DOI: https://doi.org/10.1007/s00138-023-01430-1