Listar INIT_Articles por fecha de publicación
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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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Exploring the behaviour of base classifiers in credit scoring ensembles
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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Developing a Forest Data Portal to Support Multi-Scale Decision Making
Institute of Electrical and Electronics Engineers (2012)Forests play a pivotal role in timber production, maintenance and development of biodiversity and in carbon sequestration and storage in the context of the Kyoto Protocol. Policy makers and forest experts therefore require ...
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Multispectral integral imaging acquisition and processing using a monochrome camera and a liquid crystal tunable filter
Optical Society of America (2012)This paper presents an acquisition system and a procedure to capture 3D scenes in different spectral bands. The acquisition system is formed by a monochrome camera, and a Liquid Crystal Tunable Filter (LCTF) that allows ...
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Ultrashort pulse fiber delivery with optimized dispersion control by reflection grisms at 800 nm
Optical Society of America (2012)We experimentally demonstrate a compact and efficient arrangement for fiber delivery of sub-30 fs energetic light pulses at 800 nm. Pulses coming from a broadband Ti:Sapphire oscillator are negatively pre-chirped by a ...
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Comparison results for capacity
Indiana University Mathematics Journal (2012)We obtain in this paper bounds for the capacity of a compact set $K$. If $K$ is contained in an $(n+1)$-dimensional Cartan-Hadamard manifold, has smooth boundary, and the principal curvatures of $\partial K$ are larger ...
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Surrounding neighborhood-based SMOTE for learning from imbalanced data sets
Springer (2012)Many traditional approaches to pattern classifi- cation assume that the problem classes share similar prior probabilities. However, in many real-life applications, this assumption is grossly violated. Often, the ratios ...
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Volume growth, number of ends and the topology of complete submanifolds
arXIV (2012)Given a complete isometric immersion $\phi: P^m \longrightarrow N^n$ in an ambient Riemannian manifold $N^n$ with a pole and with radial sectional curvatures bounded from above by the corresponding radial sectional curvatures ...
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On the effectiveness of preprocessing methods when dealing with different levels of class imbalance
Elsevier (2012)The present paper investigates the influence of both the imbalance ratio and the classifier on the performance of several resampling strategies to deal with imbalanced data sets. The study focuses on evaluating how learning ...
