Elsa M. Macías

Learn More
Current mobile phones come with several sensors and powerful video cameras. These video cameras can be used to capture good quality scenes, which can be complemented with the information gathered by the sensors also embedded in the phones. For example, the surroundings of a beach recorded by the camera of the mobile phone, jointly with the temperature of(More)
We propose a new approach to compute geodesic distance transformations in arbitrary 2D and 3D domains. The distance transformation proposed here is robust and has proved to have a computational complexity linear in the domain size. Our scheme is based on a new technique which we call occlusion points propagation, and with a higher accuracy than other(More)
The interest in monitoring applications using underwater sensor networks has been growing in recent years. The severe communication restrictions imposed by underwater channels make that efficient monitoring be a challenging task. Though a lot of research has been conducted on underwater sensor networks, there are only few concrete applications to a(More)
Heterogeneous clusters provide an attractive scalability of low cost in terms of computation power. However, these systems are much complicated to program than dedicated parallel machines due to the perfomance of nodes and traffic in the network changes randomly. Execution of a parallel application in a heterogeneous cluster without keeping in mind these(More)
— In a Wireless Fidelity (WiFi) network it is well known that large periods of contention, the intermittent disruptions of the service and limited bandwidth represent a handicap for interactive realtime multimedia applications since they demand high troughput and real time constraints, e.g. Video on Demand (VoD) or Voice over Internet Protocol (VoIP).(More)