Alessandro Zimmer

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This paper proposes a new hybrid handwritten signature verification system where the on-line reference data acquired through a digitizing tablet serves as the basis for the segmentation process of the corresponding scanned off-line data. Local foci of attention over the image are determined through a self-adjustable learning process in order to pinpoint the(More)
This work presents a complete control access system based on the hand geometry, a hardware key and a vital sign detector. The circuitry reads the hardware key and the heartbeat in order to confirm the identity of the author given by the analysis of the hand image. The presented system distinguish itself from other similar biometric systems mainly because of(More)
Most of the signature verification work done in the past years focused either on offline or online approaches. In this paper, a different methodology is proposed, where the online reference data acquired through a digitizing tablet serves as the basis for the segmentation process of the corresponding scanned offline data. Local windows are built over the(More)
Biometrics-based authentication is a method of personal identification that has some advantages over the password and object-based ones, mainly for the user, who doesn't need to carry or memorize anything. However, this kind of identification is also subject to problems. Besides the technology-related possibilities of fraud, such as system invasion,(More)
Dynamic pupillometry, a method that consists of measuring changes in pupil size in response to a light stimulus, can provide information about the autonomous nervous system. Therefore, it is used in the assessment of some diseases, such as diabetes. In biometric systems, it has also been used as aliveness test and, more recently to extract features to(More)
The paper discusses a new approach in contactless crash detection combining measurements of vehicle dynamics, exteroceptive sensors and vehicle-to-vehicle (V2V) communication data. The proposed architecture aims to activate vehicle safety functions prior an imminent collision to minimize the risk of suffering a major injury. An activation needs a precise(More)