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Deep learning aerial scene analysis: extracting salient features for domain adaptation and semantic segmentation tasks

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posted on 2023-11-16, 12:10 authored by Georgios Voulgaris

This research focuses on domain adaptation, semantic segmentation and feature extraction in processing aerial scene data using convolutional neural networks. The impact of popular data augmentation techniques on model performance was investigated, with experiments conducted on networks of varying depths and complexity. Data compression, geometric transformations, regional dropout strategies, and pooling augmentations were assessed, with the best-performing models found to be those with deeper architectures trained on full-sized images. Additionally, the research explores transferable features between domains, proposes an architecture that combines salient feature extraction with a wider receptive field and highlights the importance of choosing appropriate feature priors for better model generalisation. The proposed architecture implements an initial Gabor convolutional layer with a mixture of maximum and average pooling layers and dilated convolution layer to reduce the impact of seasonal variations on the feature space distributions. This research provides insights into improving model performance in aerial scene classification by addressing feature bias combined with a widened receptive field and domain shifts. Finally, the impact of the proposed solutions on semantic segmentation was investigated, particularly in detecting water bodies from aerial images. The research explored the unique physical properties of water, namely colour and texture, to identify the features that make water distinguishable. This approach proved to be effective in increasing the semantic segmentation performance of water bodies, even in the presence of light variations and canopy and shadow occlusions.

History

File Version

  • Published version

Pages

215

Department affiliated with

  • Informatics Theses

Qualification level

  • doctoral

Qualification name

  • phd

Language

  • eng

Institution

University of Sussex

Full text available

  • Yes

Supervisor

Prof. Andy Philippides and Prof. Novi Quadrianto

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