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The lip-region can be interpreted as either a genetic or behavioural biometric trait depending on whether static or dynamic information is used. In this paper, we use a texture descriptor called Local Ordinal Contrast Pattern (LOCP) in conjunction with a novel spatiotemporal sampling method called Windowed Three Orthogonal Planes (WTOP) to represent both appearance and dynamics features observed in...
The lip-region can be interpreted as either a genetic or behavioral biometric trait depending on whether static or dynamic information is used. Despite this breadth of possible application as a biometric, lip-based biometric systems are scarcely developed in scientific literature compared to other more popular traits such as face or voice. This is because of the generalized view of the research community...
The computation of any similarity score will be precluded by missing values. Missing values can be attributed to poor quality biometric data, poor data capture, or classifier error from computing the similarity scores. The presence of missing values in biometric systems can be inconvenient to the user, as the system will reject the submitted biometric data and request for another. It is therefore...
It has been shown that the authentication performance of a biometric system is dependent on the models/templates specific to a user. As a result, some users may be more easily recognized or impersonated than others. The various categories of users have been characterized by Doddington etal. (1988). We refer to this unbalanced performance across users as the Doddington's zoo effect. In the context...
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