Visualitzant INIT_Articles per data de publicació
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Single-shot color digital holography based on the fractional Talbot effect
Optical Society of America (2011-02-28)We present a method for recording on-axis color digital holograms in a single shot. Our system performs parallel phase-shifting interferometry by using the fractional Talbot effect for every chromatic channel simultaneously. ... -
View-dependent pruning for real-time rendering of trees
Elsevier (2011-04)The main problem in the real-time rendering of vegetation is the massive amount of primitives to be rendered. These primitives are needed to fully describe the geometry of the plants. However, some of them are not visible ... -
A new approach to visual-based sensory system for navigation into orange groves
MDPI Publishing (2011-04-06)One of the most important parts of an autonomous robot is to establish the path by which it should navigate in order to successfully achieve its goals. In the case of agricultural robotics, a procedure that determines this ...
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A new HLA-based distributed control architecture for agricultural teams of robots in hybrid applications with real and simulated devices or environments
MDPI Publishing (2011-04-14)The control architecture is one of the most important part of agricultural robotics and other robotic systems. Furthermore its importance increases when the system involves a group of heterogeneous robots that should ...
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Perception of products by progressive multisensory integration: a study on hammers
Elsevier (2011-07)The aim of this work is to determine the influence of multisensory (visual-haptic) integration and the level of interaction (seeing photographs, seeing the actual product, touching it and using it) on the perception of ...
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Citizen-based sensing of crisis events: sensor web enablement for volunteered geographic information
Springer Verlag (2011-07-19)Thanks to recent convergence of greater access to broadband connections, the availability of Global Positioning Systems in small packages at affordable prices and more participative forms of interaction on the Web (Web ...
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On the characterization of parabolicity and hyperbolicity of submanifolds
London Mathematical Society (2011-08)We give a set of sufficient and necessary conditions for parabolicity and hyperbolicity of a submanifold with controlled mean curvature in a Riemannian manifold with a pole and with sectional curvatures bounded from above ...
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Visualization of level-of-detail meshes on the GPU
Springer Verlag (2011-09-01)Extensive research has been carried out in multiresolution models for many decades. The tendency in recent years has been to harness the potential of GPUs to perform the level-of-detail extraction on graphics hardware. The ...
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Coherence revivals in two-photon frequency combs
American Physical Society (2011-09-16)We describe and theoretically analyze the self-imaging Talbot effect of entangled photon pairs in the time domain. Rich phenomena are observed in coherence propagation along dispersive media of mode-locked two- photon ...
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Tsallis entropy for geometry simplification
MDPI Publishing (2011-09-29)This paper presents a study and a comparison of the use of different information-theoretic measures for polygonal mesh simplification. Generalized measures from Information Theory such as Havrda–Charva ́t–Tsallis entropy ...
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Development of spatial density maps based on geoprocessing web services: application to tuberculosis incidence in Barcelona, Spain
BioMed Central (2011-11-29)Background: Health professionals and authorities strive to cope with heterogeneous data, services, and statistical models to support decision making on public health. Sophisticated analysis and distributed processing ...
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On the Dynamic Time Warping of Cyclic Sequences for Shape Retrieval
Elsevier (2012)In the last years, in shape retrieval, methods based on Dynamic Time Warping and sequences where each point of the contour is represented by elements of several dimensions have had a significant presence. In this approach ...
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Speeding up the log-polar transform with inexpensive parallel hardware: graphics units and multi-core architectures
Springer-Verlag (2012)Log-polar imaging is a kind of foveal, biologically inspired visual representation with advantageous properties in practical applications in computer vision, robotics, and other fields. While the cheapest, most flexible, ...
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Filter-Type Variable Selection Based on Information Measures for Regression Tasks
MDPI AG (2012)This paper presents a supervised variable selection method applied to regression problems. This method selects the variables applying a hierarchical clustering strategy based on information measures. The proposed technique ...
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Multibeam second-harmonic generation by spatiotemporal shaping of femtosecond pulses
Optical Society of America (2012)
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Spatial threshold exceedance analysis through marked point processes
Wiley- Blackwell (2012)Indicators of recurrence, persistence and, in general, distribution patterns of extremal events defined by random field threshold exceedances provide relevant information on critical phenomena for risk assessment. Such ...
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A virtual globe tool for searching and visualizing geo-referenced media resources in social networks
Springer (2012)The current collaborative context and resource sharing that drives Web 2.0 is gaining importance within academia and industry, which is stimulating the development of new techniques for content retrieval, sharing and ...
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Single-pixel digital ghost holography
American Physical Society (2012)Since its discovery, the “ghost” diffraction phenomenon has emerged as an unconventional technique for optical imaging with very promising advantages. However, extracting the intensity and phase information of a structured ...
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Two-level classifier ensembles for credit risk assessment
Elsevier (2012)Many techniques have been proposed for credit risk assessment, from statistical models to artificial intelligence methods. During the last few years, different approaches to classifier ensembles have successfully been ...
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Free-Motion Beam Propagation Factor Measurement by Means of a Liquid Crystal Spatial Light Modulator
Institute of Electrical and Electronics Engineers (2012)In contrast to the mechanical scanning procedure described in the standard ISO/DIS 11146, the use of electronically tunable focal length lenses has proved its capability for the measurement of the laser beam propagation ...
