Semantic segmentation of remote sensing data such as multispectral imagery has been boosted recently using deep convolutional neural networks (CNN). However, segmentation of multispectral images using supervised machine learning algorithms such as CNN requires a significant number of pixel-level annotated data, often unavailable, making the task extremely challenging. To address this, this paper puts forward a semi-supervised framework, based on generative adversarial networks (GAN). The proposed solution consists of a generator network to provide photo-realistic images as extra training data to a multi-class classifier acting as a discriminator and trained on a small annotated dataset. Performance of the proposed semi-supervised GAN is evaluated on two benchmarks multispectral semantic segmentation datasets collected from urban scenes of Vaihingen and Potsdam. Results indicate that the proposed framework achieves competitive performance compared to state-of-the-art semantic segmentation methods and show the potential of GAN-based methods for the challenging task of multispectral image segmentation.
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