The impact of label noise on the classification models for hyperspectral images

Supervised classification methods rely heavily on labeled training data. However, errors in the manually labeled data arise inevitably in practice, especially in applications where data labeling is a complex and expensive process, as is often the case in remote sensing. Erroneous labels affect the learning models, deteriorate the classification performances and hinder thereby subsequent image analysis and scene interpretation. In this paper, we analyze the effect of erroneous labels on spectral signatures of landcover classes in remotely sensed hyperspectral images (HSIs). We analyze also statistical distributions of the principal components of HSIs under label noise in order to interpret the deterioration of the classification performance. We compare the behaviour of different types of classifiers: spectral only and spectral-spatial classifiers based on different learning models including deep learning. Our analysis reveals which levels of label noise are acceptable for a given tolerance in the classification accuracy and how robust are different learning models in this respect.

Publication year:2021

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