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One of the main challenges of off-line signature verification is the absence of large databases. A possible alternative to overcome this problem is the generation of fully synthetic signature databases, not subject to legal or privacy concerns. In this paper we propose several approaches to the synthesis of off-line enhanced signatures from real dynamic information. These synthetic samples show a...
Due its possibilities in security systems and robotics, face recognition is one of the most researched areas within the biometric field. In a common scenario from real life face recognition problem, the dimension in the sample space is larger than the number of training samples per class. This is known as the “small sample size problem”. Discriminative Common Vectors (DCV) technique has been used...
We have developed a procedure for the complete characterization of femtosecond-laser written Er/Yb-codoped glass waveguides. The procedure is based on precise measurements of both pump and 1.5 ??m -band output powers when the waveguide is diode-laser pumped at 980 nm. The dependence of these optical powers on the input pump power is fitted to the results derived from a detailed numerical model of...
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