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An increasing number of studies have reported that the quality of biometric samples has a significant impact on the performance of the system. However, to our best knowledge, these studies are limited to impersonation attempts from different subjects, i.e., zero-effort attack, and they do not take into account the possibility of spoof attack, also called non-zero effort attack. In order to thwart...
We address reducing the mismatch between training and testing conditions for hands-free in-car speech recognition. It is well known that the distortions caused by background noise, channel effects, etc., are highly nonlinear in the log-spectral or cepstral domain. This letter introduces a joint sparse representation (JSR) to estimate the underlying clean feature vector from a noisy feature vector...
The use of quality measures in biometrics is rapidly becoming the standard strategy for improving performance of biometric systems, especially in the presence of variable environmental conditions of signal capture. It is often necessary to integrate multiple quality measures into the classification process in order to capture the relevant aspects of signal quality. The inclusion of multiple quality...
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