Prototype-based Inter-Intra Domain Alignment Network for Unsupervised Cross-Scene Hyperspectral Image Classification

Unsupervised cross-scene hyperspectral image classification transfers the learnable knowledge from a labeled source scene to an unlabeled target scene. Currently, many statistical distribution alignment methods are introduced to mitigate domain discrepancy. However, these methods ignore the finer class specific structure which may cause negative transfer. To solve this issue, a prototype-based inter-intra domain alignment network is proposed for unsupervised cross-scene hyperspectral image classification. Specifically, a prototype-based inter-intra alignment method is proposed to narrow the feature distribution gap. Furthermore, an uncertainty estimation is developed to obtain highly reliable pseudo-labels in the target scene. Experiment results on several datasets imply that the proposed method outperform several cutting-edge unsupervised classification methods.