Bivariate empirical mode decomposition for ECG-based biometric identification with emotional data
Ferdinando, Hany; Seppänen, Tapio; Alasaarela, Esko (2017-09-14)
H. Ferdinando, T. Seppänen and E. Alasaarela, "Bivariate empirical mode decomposition for ECG-based biometric identification with emotional data," 2017 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Seogwipo, 2017, pp. 450-453. doi: 10.1109/EMBC.2017.8036859
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https://urn.fi/URN:NBN:fi-fe202003248942
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Abstract
Emotions modulate ECG signals such that they might affect ECG-based biometric identification in real life application. It motivated in finding good feature extraction methods where the emotional state of the subjects has minimum impacts. This paper evaluates feature extraction based on bivariate empirical mode decomposition (BEMD) for biometric identification when emotion is considered. Using the ECG signal from the Mahnob-HCI database for affect recognition, the features were statistical distributions of dominant frequency after applying BEMD analysis to ECG signals. The achieved accuracy was 99.5% with high consistency using kNN classifier in 10-fold cross validation to identify 26 subjects when the emotional states of the subjects were ignored. When the emotional states of the subject were considered, the proposed method also delivered high accuracy, around 99.4%. We concluded that the proposed method offers emotion-independent features for ECG-based biometric identification. The proposed method needs more evaluation related to testing with other classifier and variation in ECG signals, e.g. normal ECG vs. ECG with arrhythmias, ECG from various ages, and ECG from other affective databases.
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