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A CROSS-MODAL ADAPTATION APPROACH FOR BRAIN DECODING


Abstract


Brain decoding has become a hot topic in many recent brain studies. In a typical neuroimaging experiment, participants are presented with different categories of stimuli while their concurrent brain activity is recorded. Then a classifier is trained on the features extracted from the recorded brain data to discriminate different target stimuli classes. It is a common practice to hypothesize that the stimulus-related information exists in the brain data if the decoder can accurately predict the target stimulus category. However, most of the neuroimaging studies suffer from few and noisy samples. These constraints affects the performance of such decoding systems. In order to cope with this limitation, a dictionary learning approach is used in this paper to transfer knowledge from the multimedia domain to the brain domain. We show that such cross-modal domain adaptation yields better performance of the learning algorithm in the brain domain. This is the first study in the direction of cross-modal adaptation by joint dictionary learning on multimedia and brain modality.

KeyWords
brain decoding, signal processing, multimedia information retrieval, domain adaptation, genre classification



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