Josep Isern

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In this paper a basic conceptual architecture aimed at the design of Computer Vision System is qualitatively described The pro posed architecture addresses the design of vision systems in a modular fashion using modules with three distinct units or components a process ing network or diagnostics unit a control unit and a communications unit The control of(More)
Very little attention has been devoted to the problem of modular composition of vision capabilities in perception-action systems. While new algorithms and techniques have paved the way for important developments, the majority of vision systems are still designed and integrated in a very primitive way according to modern software engineering principles. This(More)
Unmanned Underwater Vehicles (UUVs) are commonly used in Oceanography due to their relative low cost and wide range of capabilities. Gliders are a type of UUV particularly suitable for long-range missions because of their large autonomy. They change their buoyancy to dive and climb describing a vertical saw tooth pattern, which produces an effective but low(More)
This paper summarizes the proposal made by the SIANI team for the LifeCLEF 2015 Fish task. The approach makes use of standard detection techniques, applying a multiclass SVM based classifier on large enough Regions Of Interest (ROIs) automatically extracted from the provided video frames. The selection of the detection and classification modules is based on(More)
Ocean gliders constitute an important advance in the highly demanding ocean monitoring scenario. Their efficiency, endurance and increasing robustness make these vehicles an ideal observing platform for many long term oceanographic applications [1]. However, they have proved to be also useful in the opportunistic short term characterization of dynamic(More)
Tracking is a basic process for security and surveillance problems that need to follow an object of interest during a certain period of time. Visual tracking algorithms based on pattern matching techniques constitute the basis of many, and the most used, current tracking systems (Brown, 1992). However, the main drawback of template matching consists in its(More)
In this work, we present a hybrid control structure for a mobile robotic system which combines concepts from homeostatic control and adaptive behavior. The homeostatic control consists of a set of control loops operating on state variables. These variables are computed from pre-categorical sensory data and also from high-level application results. The(More)