Title :
A novel unified framework for noise-robust ECG-based biometric authentication
Author :
Choudhary, Tilendra ; Manikandan, M. Sabarimalai
Author_Institution :
Sch. of Electr. Sci., Indian Inst. of Technol. Bhubaneswar, Bhubaneswar, India
Abstract :
This paper presents a simple unified ensemble averaged heartbeat extraction framework for noise-robust ECG-based biometric authentication using heartbeat morphology. The proposed method consists of three major steps: preprocessing, ensemble averaged beat construction, and similarity matching. At the preprocessing stage, the signal blocking and mean removal operations are performed. The ensemble averaging stage includes the steps of: discrete cosine transform (DCT) based filter for simultaneous removal of BW and PLI noises, straightforward Gaussian derivative filter (GDF)-based R-peak detector, period normalization and peak-centering, and ensemble averaging computation. At the similarity matching stage, we study the performance of both time-domain and wavelet-domain distance metrics for finding the similarity between a test ensemble ECG beat template and an enrolled ECG beat template. The performance of the proposed framework is tested and validated using different types of ECG signals taken from the standard ECG databases. Results show that the ECG-biometric method using normalized cross correlation (NCC) metric provides consistent verification results as compared to the other four methods under different noisy conditions and sampling rates. For predefined threshold of 0.97, the NCC-based ECG-biometric method achieves an average false rejection rate (FRR) of 11.6% and false acceptance rate (FAR) of 5.8% for 3969 imposters and 19404 test segments from enrolled subjects, respectively.
Keywords :
biometrics (access control); discrete cosine transforms; electrocardiography; filtering theory; pattern matching; signal denoising; signal sampling; time-domain analysis; wavelet transforms; BW noise removal; DCT based filter; ECG databases; ECG signals; FAR; FRR; GDF-based R-peak detector; Gaussian derivative filter based R-peak detector; NCC metric; NCC-based ECG-biometric method; PLI noise removal; average false rejection rate; discrete cosine transform based filter; enrolled ECG beat template; ensemble averaged beat construction; ensemble averaging computation; false acceptance rate; heartbeat morphology; mean removal operations; noise-robust ECG-based biometric authentication; normalized cross correlation metric; peak-centering; period normalization; preprocessing stage; signal blocking operations; similarity matching stage; simple unified ensemble averaged heartbeat extraction framework; test ensemble ECG beat template; time-domain distance metrics; wavelet-domain distance metrics; Authentication; Databases; Electrocardiography; Feature extraction; Heart beat; Heart rate variability; Noise;
Conference_Titel :
Signal Processing and Integrated Networks (SPIN), 2015 2nd International Conference on
Conference_Location :
Noida
Print_ISBN :
978-1-4799-5990-7
DOI :
10.1109/SPIN.2015.7095379