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Comparison of methods for correcting outliers in ECG-based biometric identification

Jun Su, Szmajda Miroslaw, Khoma Volodymyr, Khoma Yuriy, Sabodashko Dmytro, Kochan Orest, Wang Jinfei

Metrology and Measurement Systems

2020

Vol. 27, nr 3

387--398

The aim of this paper is to compare the efficiency of various outlier correction methods for ECG signal processing in biometric applications. The main idea is to correct anomalies in various segments of ECG waveform rather than skipping a corrupted ECG heartbeat in order to achieve better statistics. Experiments were performed using a self-collected Lviv Biometric Dataset. This database contains over 1400 records for 95 unique persons. The baseline identification accuracy without any correction is around 86%. After applying the outlier correction the results were improved up to 98% for autoencoder based algorithms and up to 97.1% for sliding Euclidean window. Adding outlier correction stage in the biometric identification process results in increased processing time (up to 20%), however, it is not critical in the most use-cases.