Papadakis N.,Barcelona Media |
Caselles V.,University Pompeu Fabra
Journal of Mathematical Imaging and Vision | Year: 2010
We describe here a method to compute the depth of a scene from a set of at least two images taken at known view-points. Our approach is based on an energy formulation of the 3D reconstruction problem which we minimize using a graph-cut approach that computes a local minimum whose energy is comparable (modulo a multiple constant) with the energy of the absolute minimum. As usually done, we treat the input images symmetrically, match pixels using photoconsistency, treat occlusion and visibility problems and consider a spatial regularization term which preserves discontinuities. The details of the graph construction as well as the proof of the correctness of the method are given. Moreover we introduce a multi-label refinement algorithm in order to increase the number of depth labels without significantly increasing the computational complexity. Finally we compared our algorithm with the results available in the Middlebury database. © 2010 Springer Science+Business Media, LLC. Source
Usher J.,Barcelona Media
Journal of the Acoustical Society of America | Year: 2010
Determining the absolute onset time of reflections in an acoustic impulse response (IR) has applications for both subjective and physical acoustics problems. Although computationally simple, a first-order energetic analysis of the IR can lead to false-positive identification of reflections. This letter reports on a method to determine reflection onset timings using a modified running local kurtosis analysis to identify regions in the IR where the distribution is non-normal. IRs from both real and virtual rooms are used to validate the method and to find optimum analysis window sizes. © 2010 Acoustical Society of America. Source
Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: SEC-2013.6.1-1 | Award Amount: 4.25M | Year: 2014
Social media (SM) statistics during recent disasters (e.g., the 20 million tweets relating to Sandy storm and the sharing of related photos in Instagram at a rate of 10/sec) provide tangible evidence that security forces and civil protection agencies could greatly benefit from the effective blending of SM information into their processes. However, despite the widespread use of SM in various domains (e.g., marketing/branding/finance, there is still no easy, structured and effective way to leverage several SM in security/emergency management applications. SUPER is a joint effort of social media experts (incl. social network providers) and security experts (incl. security and civil protection agencies), towards introducing a holistic, integrated and privacy-friendly approach to the use of social media in emergencies and security incidents. The approach will operate at multiple time-scales (before/during/after events), while serving both strategic and tactical level operations. It will be characterized by: a. Intelligent information gathering from SM based on novel algorithms (sentiment analysis, topic tracking, real-time event detection), b. Quantitative assessment of the credibility of SM information towards alleviating manipulation, c. Integrated search over multiple SM towards deriving non-obvious information, d. Gathering/analysis of the citizens and the forces opinions as part of policy modelling processes, e. Use of SM as an effective way for conveying information to stakeholders, f. Modular integration of the above functionalities within existing processes for strategic planning, management of operations, generation of operational picture and management of policies for emergencies, g. Compliance with privacy laws/regulations. SUPER will be validated in two complementary scenarios spanning civil protection activities (earthquakes) and police activities (unrest).
Agency: Cordis | Branch: FP7 | Program: CSA-CA | Phase: REGIONS-2012-2013-1 | Award Amount: 2.31M | Year: 2013
Transmedia, the future of Media industry Media industry, a strongly technology driven sector suffers, in Europe, of fragmented R&D efforts (a fact highlighted by the Digital Agenda). In consequence there are still some missing essential technical components to be developed in Europe. Given the changing context in the media sector and the economic significance of this highly competitive and supportive of growth domain, it is crucial to mobilise European actors in order to prepare the transition from mono-media to Transmedia and strengthen Europe in front of US and Asia competition. The EuroTransmedia project gathers some of the most influent triple helix media clusters in Europe. Together they represent a critical mass of complementary skills all along the value chain generating a turnover of about 19Bn a year and their R&D budget is about 8% of this turnover, whether 1,5Bn of public and private money. The EuroTransmedia project intends to: 1/ Integrate key EU problematic areas by joining the research efforts to get rid of the remaining technological barriers that still hamper user creativity, user content editing interoperability, portability and new editorial policy (which can be seen as the future of media industry). It will tackle technological, scientific, organisational and economic challenges for research and innovation for Media industry in the EU. The project will identify key needs of the industry to drive research topics The project will map competencies and skills to cover these needs at European level Gathering innovative SMEs and research labs, the project will speed up the uptake of ICT innovation. 2/ Adapt a new value chain to the new economy where the user is both a consumer and a producer, and where practices are nomadic and ubiquitous. By gathering stakeholders covering the whole value chain of the media sector the project will contribute at reshaping the value chain taking account of the transmedia constraints. Therefore the project addresses the industrial challenges, taking into account EU challenges of boosting smart growth indicating project priorities at the EU level, and finally via creating integrated value chain addressing research priorities at project level. The project intends to be an enabler of new business models that will allow the stakeholders to take the leadership of worldwide markets 3/ Defragmenting research: The development of a common inter-regional research agenda and associated Join Action Plan integrating regional specialisation and bringing together experiences of 6 key European research-driven clusters. This action will link industry and research over different territories at a European level. The project defines the basis of an efficient and internationally competitive European industry of transmedia, empowering the expertise of several countries involved in technological taking into account international competition, new and innovative technologies.
Agency: Cordis | Branch: FP7 | Program: BSG-SME | Phase: SME-2013-1 | Award Amount: 1.39M | Year: 2013
The 3FLEX project aims to define and develop a new advanced workflow for flexible 2D, stereo and multiview video production capable to deal with and take advantage of the image\depth content approach and to develop the building blocks to implement it. This workflow enhances current 2D and 3D production workflows, and regarding the 2D to 3D conversion processes promises cost savings and improvements in terms of production efficiency and workflow automation. The implementation of the new 3FLEX workflow requires the development of tools and pieces that cover most of the process: adaptation to the supplementary data in the image ingest and the pre-processing architectures, development of new image\depth channel retouch and processing tools and adaptation of existing post-production tools in order to take advantage of the existing depth channel. These 3FLEX tools necessary to complete the new workflow will be delivered as plugins and upgrades, adding value and functionalities to established post-production platforms. The 3FLEX outcomes will be tested in an experimental production and showcased by academic and industrial partners in research and commercial forums. To this end, 3FLEX will not only offer new post-production tools, it will also take care that they are embedded seamlessly as plug-ins into the existing infrastructure of professional 2D and 3D production workflows. The three companies in the 3FLEX consortium address different phases and processes in the postproduction industry, yet they envision a shared workflow and could take advantage of related image processing technologies in their tools. For this reason they felt impelled to work together as a consortium to propel the postproduction technologies beyond the state of the art and integrating the resulting products into their own workflows and catalogues. This way, the SME participants in the 3FLEX project will improve their competitiveness in global markets in the near future.