Suchergebnisse

El incremento en el uso de las plataformas digitales y las redes sociales por parte de diferentes actores de la esfera pública se ha convertido en una de las líneas de estudio con más aportes en las últimas décadas en los estudios de la Comunicación. Su uso en momentos de crisis política revela la importancia de la comunicación estratégica de los actores políticos, puesto que la convierte en comunicación de crisis. En este trabajo analizamos la comunicación estratégica digital del expresidente de Ecuador, Guillermo Lasso, en la crisis política provocada por el juicio político en su contra (mayo 2023) y la convocatoria a elecciones anticipadas. Para ello, presentamos un análisis crítico del discurso de los tuits emitidos por el expresidente entre mayo y julio de 2023. Los resultados dan cuenta de un giro en su estrategia comunicacional digital y en su relación con el resto de actores políticos tras el anticipo electoral.

Citizen insecurity is an ever-present issue in the Public and Private Agenda of the Spanish population. The concept of the "Private Agenda" is being used for the first time and we have decided to include it in this piece of work alongside the Public Agenda, even though we have used it before in several research studies. In this introductory article, we set out its behaviour in both agenda, where it has reached very high levels, often being cited together with the two main issues in Public and Private Agenda, namely Unemployment and Terrorism, and, currently, Immigration and Housing. This means citizen insecurity has become an important impact issue in public and political communication. The cycle, which ended in 2004, is, primarily, a unique political and social cycle which should be treated separately from the rest. Interest in agenda analysis has risen, amongst other reasons, due to its remarkable relevance when seeking to understand the politico-cognitive dynamic in the citizens, and its importance for political communication. ; La inseguridad ciudadana es un tema crónico en las Agendas Pública y Personal de los españoles. El concepto de "Agenda Personal" es nuevo en su uso, y lo presentamos aquí en conexión con la Agenda Pública, aunque lo hemos usado antes en diversas investigaciones. En este artículo introductoria presentamos su comportamiento en ambas agendas, en las que alcanza rangos muy altos, acompañando con frecuencia a los dos temas principales de las Agendas Pública y Personal (Paro y Terrorismo, y actualmente Inmigración y Vivienda), lo que coloca a la inseguridad ciudadana como un tema importante de impacto en la comunicación pública y política. El ciclo que se cierra en 2004 es, sobre todo, un ciclo político y social peculiar que merece un tratamiento autónomo. El interés del análisis de agendas deriva, entre otras cosas, de su peculiar relevancia para entender la dinámica político-cognitiva de la ciudadanía, y su trascendencia para la comunicación política.

Resumen en español

Comunicació presentada al IS&T International Symposium on Electronic Imaging, celebrat del 14 al 18 de febrer de 2016 a San Francisco (CA, USA) i organitzat per la Society for Imaging Science and Technology. ; In this paper we present a simple and affordable method to generate high quality video from a high dynamic range scene. It is performed without utilizing extra lighting, neither alternating exposures, nor operating with dual-camera set-ups. Our input is an interlaced video alternating row pairs with different ISO values, as some DSLR camera models can provide. The proposed algorithm involves two main steps: first the computation of two single-ISO full-frame images (one for each ISO value) using an inpainting-based deinterlacing method, followed by their combination into a single frame by a weighted average. This results in a high dynamic range frame, containing all the details in bright and dark areas at the same time, that is finally tone-mapped into a low dynamic range frame for display purposes. Current results show this is a practical and cost-effective method that produces outputs free of ghosting artifacts and with very little noise. ; This work was supported by the European Research Council, Starting Grant ref. 306337, by the Spanish government, grant ref. TIN2012-38112, and by the Icrea Academia Award.

En las últimas dos décadas del siglo XXI, el marco político del desarrollo y la cooperación sufrió importantes variaciones que obligaron a las organizaciones socias de la Cooperación Internacional para el Desarrollo (CID) a redefinir sus objetivos, roles y estrategias. Este artículo se desprende de un proyecto de investigación, de corte cualitativo y carácter inductivo, que a través de la recolección y análisis de datos empíricos analizó y abordó dichos cambios. Derivado de este proceso, se identificó, por un lado, el surgimiento de nuevas tendencias en la forma de gestionar la CID como lo son la flexibilización y el trabajo en red; por otro lado, la continuidad en el seguimiento del modelo de desarrollo basado en la teoría de la modernización y el prevalecimiento de las asimetrías entre las distintas partes involucradas. Desde el enfoque teórico de la gobernanza, el presente artículo explica la forma en la que estas tendencias están incidiendo en las relaciones entre los distintos actores del desarrollo y la cooperación internacional.

El análisis del devenir histórico de la cooperación internacional para el desarrollo (CID) permite entrever una suerte de tendencias que parecen delimitar etapas de crisis, transición y auge. Desde esta perspectiva y según lo propuesto por Schulz (2010), Mawdsley, Savage y Kim (2014) y Appe (2017)el contexto mundial de la post-ayuda, al ser un periodo precedido por momentos de crisis y dar indicios de conllevar un replanteamiento de la CID podría ser interpretado como su fase de transición. Por ello este artículo, a través de la modalidad de investigación documental y el método deductivo, propone un análisis de la transición observada por la CID desde el arranque del debate de la eficacia de la ayuda hasta el surgimiento del contexto mundial de la post-ayuda en aras de caracterizar el giro en su esencia y narrativa.

Este trabajo realiza una descripción crítica de la Acción Educativa Española en el Exterior tanto desde un aspecto formal como desde un punto de vista evolutivo, analizando los datos existentes desde los cursos 2004-05 a 2014-15. Los resultados del mismo indican que más allá de un interés por dar a conocer la cultura española, el sentido real del mantenimiento de la inversión en este tipo de acciones educativas parece proceder de los intereses económicos que la expansión de la lengua española pueda reportar al estado español.

Comunicació presentada a: SMPTE 2017 Annual Technical Conference and Exhibition, celebrat del 23 al 26 d'octubre de 2017 a Los Angeles, Estats Units d'Amèrica. ; In cinema and TV it is quite usual to have to work with footage coming from several cameras, which show noticeable color differences among them even if they are all the same model. In TV broadcasts, technicians work in camera control units so as to ensure color consistency when cutting from one camera to another. In cinema post-production, colorists need to manually colormatch images coming from different sources. Aiming to help perform this task automatically, the Academy Color Encoding System (ACES) introduced a color management framework to work within the same color space and be able to use different cameras and displays; however, the ACES pipeline requires to have the cameras characterized previously, and therefore does not allow to work 'in the wild', a situation which is very common. We present a color stabilization method that, given two images of the same scene taken by two cameras with unknown settings and unknown internal parameter values, and encoded with unknown non-linear curves (logarithmic or gamma), is able to correct the colors of one of the images making it look as if it was captured with the other camera. Our method is based on treating the in-camera color processing pipeline as a combination of a 3x3 matrix followed by a non-linearity, which allows us to model a color stabilization transformation among two shots as a linear-nonlinear function with several parameters. We find corresponding points between the two images, compute the error (color difference) over them, and determine the transformation parameters that minimize this error, all automatically without any user input. The method is fast and the results have no spurious colors or spatio-temporal artifacts of any kind. It outperforms the state of the art both visually and according to several metrics, and can handle very challenging real-life examples. ; This work was supported by the European Research Council, Starting Grant ref. 306337, by the Spanish government and FEDER Fund, grant ref. TIN2015-71537-P(MINECO/FEDER,UE), and by the Icrea Academia Award. The work of J. Vazquez-Corral was supported by the Spanish government under Grant IJCI-2014-19516.

We present a color matching method that, given two different views of the same scene taken by two cameras with unknown settings and unknown internal parameter values, and encoded with unknown non-linear curves, is able to correct the colors of one of the images making it look as if it was captured under the other camera's settings. Our method is based on treating the in-camera color processing pipeline as a matrix multiplication followed by a non-linearity. This allows us to model a color stabilization transformation among the two shots by estimating several parameters. The method is fast and the results have no spurious colors. It outperforms the state-of-the-art both visually and according to several metrics, and can handle very challenging real-life examples. ; This work has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement number 761544 (project HDR4EU) and under grant agreement number 780470 (project SAUCE), and by the Spanish government and FEDER Fund, grant ref. TIN2015-71537-P (MINECO/FEDER,UE).

In this paper we present a novel approach to the problem of exposure fusion of a stack of pictures for the generation of high dynamic range (HDR) radiance maps. All exposure fusion approaches, when applied on 8-bit non-RAW pictures, perform photometric/ncalibration by estimating and inverting the camera response function, which is assumed to be a channelwise-independent function which does not change with the exposure. Our experiments show that these assumptions do not always hold and that the camera may automatically introduce changes (in gain, white balance, gamma correction value) from one exposure to the next when performing the non-linear operations involved in recording pictures in non-RAW formats such as JPEG. The net result is that HDR radiance maps obtained from exposure fusion of non-linear data may have substantially more error than if computed directly from the linear, RAW data. Our proposed method overcomes this problem and compensates for the changes introduced by the camera by matching the color correction and gamma correction transforms of all pictures to those of a reference picture in the stack, providing a clear improvement in terms of PSNR with respect to the classical method of Debevec and Malik. ; This work was supported by the European Research Council, Starting Grant ref. 306337, by the Spanish government, grant ref. TIN2012-38112, and by the Icrea Academia Award

Multiple-exposure approaches for high dynamic range (HDR) image generation share a set of building assumptions: that color channels are independent and that the camera response function (CRF) remains constant while changing the exposure. The first contribution of this paper is to highlight how these assumptions, which were correct for film photography, do not hold in general for digital cameras. As a consequence, results of multiexposure HDR methods are less accurate, and when tone-mapped they often present problems like hue shifts and color artifacts. The second contribution is to propose a method to stabilize the CRF while coupling all color channels, which can be applied to both static and dynamic scenes, and yield artifact-free results that are more accurate than those obtained with state-of-the-art methods according to several image metrics. ; This work has received funding from the European Unions Horizon 2020 research and innovation programme under grant agreement number 761544 (project HDR4EU) and under grant agreement number 780470 (project SAUCE), and by the Spanish government and FEDER Fund, grant ref. TIN2015-71537-P (MINECO/FEDER,UE). The work of J. Vazquez-Corral was supported by the Spanish government under Grant IJCI-2014-19516.

Multiple-exposure approaches for high dynamic range (HDR) image generation share a set of building assumptions: that color channels are independent and that the camera response function (CRF) remains constant while changing the exposure. The first contribution of this paper is to highlight how these assumptions, which were correct for film photography, do not hold in general for digital cameras. As a consequence, results of multiexposure HDR methods are less accurate, and when tonemapped they often present problems like hue shifts and color artifacts. The second contribution is to propose a method to stabilize the CRF while coupling all color channels, which can be applied to both static and dynamic scenes, and yield artifact-free results that are more accurate than those obtained with state-of-the-art methods according to several image metrics. ; The work of the authors was supported by the European Unions Horizon 2020 research and innovation programme grant 761544 (project HDR4EU) and grant 780470 (project SAUCE) and by the Spanish government and FEDER fund grant TIN2015-71537-P (MINECO/FEDER,UE). The work of the second author was supported by the Spanish government under grant IJCI-2014-19516.