149 research outputs found

    Video Quality Assessment

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    Child Soldier: ejemplo de cómo llevar las técnicas del teatro contemporáneo al aula de secundaria

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    Los procesos de creación contemporáneos desde la performance al happening pasando por la instalación o el vídeoarte son los idóneos en el marco de la enseñanza en secundaria y sobre todo en grupos de difícil desempeño y en circunstancias complejas, como las que aquí vamos a presentar. Nuestra propuesta es la defensa de una metodología más abierta y flexible en la enseñanza del Teatro en la actualidad, más cercana a propuestas artísticas contemporáneas. Aquí nos vamos a centrar en los inicios de un proyecto performativo, uno de los momentos más complejos y fascinantes de todo proceso escénico, artístico y didáctico

    Child Soldier: from performance to avant-garde techniques in high-school theatre

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    Los procesos de creación contemporáneos desde la performance al happening pasando por la instalación o el vídeoarte son los idóneos en el marco de la enseñanza en secundaria y sobre todo en grupos de difícil desempeño y en circunstancias complejas, como las que aquí vamos a presentar. Nuestra propuesta es la defensa de una metodología más abierta y flexible en la enseñanza del Teatro en la actualidad, más cercana a propuestas artísticas contemporáneas. Aquí nos vamos a centrar en los inicios de un proyecto performativo, uno de los momentos más complejos y fascinantes de todo proceso escénico, artístico y didáctico.Les processus de création contemporaine de la performance jusqu’au happening, en passant par l’installation o l’art vidéo, sont adaptés au contexte de l'enseignement secondaire et surtout pour des groupes qui ont des circonstances difficiles et complexes, tels que ceux que nous présentons ici. Notre proposition est de défendre une approche plus ouverte et flexible dans l’enseignement du théâtre d’aujourd'hui, pour qu’elle soit plus proche des propositions artistiques contemporaines. Nous allons nous concentrer, ici, sur les débuts d'un projet de performance ; un des moments les plus complexes et fascinants de tout processus scénique, artistique et didactique.Avant-garde theatre techniques are the most adequate on a secondary education high-school theatre project. The art of performance, happening or videoart are essential in this environment, especially with risky groups. Our proposal is the defense of an open and flexible methodology, based on contemporary experiences, which are more familiar to the student. In this paper, the whole creative process is explained from the beginning to the stage, summarizing the landmarks and emphasizing the tools used, which included audiovisual contents and internet

    Medidas de calidad subjetiva y objetiva para vídeo UHD en el entorno del proyecto PLEASE

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    •Introducción: ¿Qué es calidad de vídeo? •La calidad como línea de investigación. •Definición de pruebas subjetivas. •Algunos detalles de las pruebas. •Conclusione

    REACTION: Research and experimental assessment of control plane architectures for in-operation flexgrid network re-optimization

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    CONNECT: The magazine from the GÉANT community. Issue 18, 2015.The REACTION project proposes, designs, and validates flexi-grid elastic optical networks enabling software-controlled high-rate transmissions. In this paper, the main project objectives are reported, together with a brief summary on two main REACTION studies.Postprint (published version

    Subjective quality assessment in stereoscopic video based on analyzing parallax and disparity

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    Disparity may cause visual discomfort. Pairs of video sequences with different levels of parallax, both negative and positive, were presented together to the observers. The observers evaluated the cases in which visual discomfort occurred after visualizing the transition on each pair

    Insertion of impairments in test video sequences for quality assessment based on psychovisual characteristics

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    Assessing video quality is a complex task. While most pixel-based metrics do not present enough correlation between objective and subjective results, algorithms need to correspond to human perception when analyzing quality in a video sequence. For analyzing the perceived quality derived from concrete video artifacts in determined region of interest we present a novel methodology for generating test sequences which allow the analysis of impact of each individual distortion. Through results obtained after subjective assessment it is possible to create psychovisual models based on weighting pixels belonging to different regions of interest distributed by color, position, motion or content. Interesting results are obtained in subjective assessment which demonstrates the necessity of new metrics adapted to human visual system

    Proposal for Characterization of 3DTV Video Sequences Describing Parallax Information

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    Recommendations such as P.910 suggests parameters TI (temporal information) and SI (spatial information) for characterizing video sequences for quality assessment. In this paper, we suggest two additional parameter based on disparity called SPI (spatial parallax information) and TPI (temporal parallax information) to characterize 3DTV video sequences for this purpose

    Definition of masks related to psychovisual features for video quality assessment

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    Video Quality Assessment needs to correspond to human perception. Pixel-based metrics (PSNR or MSE) fail in many circumstances for not taking into account the spatio-temporal property of human's visual perception. In this paper we propose a new pixel-weighted method to improve video quality metrics for artifacts evaluation. The method applies a psychovisual model based on motion, level of detail, pixel location and the appearance of human faces, which approximate the quality to the human eye's response. Subjective tests were developed to adjust the psychovisual model for demonstrating the noticeable improvement of an algorithm when weighting the pixels according to the factors analyzed instead of treating them equally. The analysis developed demonstrates the necessity of models adapted to the specific visualization of contents and the model presents an advance in quality to be applied over sequences when a determined artifact is analyzed

    Finding an objective cost for sliceable flexgrid transponders

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    We analyze the objective cost of SBVTs as a function of the traffic conveyed by IP/MPLS-over-flexgrid networks. Optimal results show that cost increment with respect to BVTs is related to the aggregation level.Postprint (published version
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