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The advance of the Internet in the past decade has radically changed the way people communicate and col- laborate with each other. Physical distance is no more a barrier in online social networks, but cultural differences (at the individual, community, as well as societal levels) still govern human-human interactions and must be con- sidered and leveraged in the online world. The rapid de-ployment of high-speed Internet allows humans to interact using a rich set of multimedia data such as texts, pictures, and videos. This position paper proposes to define a new research area called ’connected multimedia’, which is the study of a collection of research issues of the super-area social media that receive little attention in the literature. By connected multimedia, we mean the study of the social and technical interactions among users, multimedia data, and devices across cultures and explicitly exploiting the cultural differences. We justify why it is necessary to bring attention to this new research area and what benefits of this new research area may bring to the broader scientific research community and the humanity. 相似文献
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Yu J Amores J Sebe N Radeva P Tian Q 《IEEE transactions on pattern analysis and machine intelligence》2008,30(3):451-462
In this paper, we present a general guideline to find a better distance measure for similarity estimation based on statistical analysis of distribution models and distance functions. A new set of distance measures are derived from the harmonic distance, the geometric distance, and their generalized variants according to the Maximum Likelihood theory. These measures can provide a more accurate feature model than the classical Euclidean and Manhattan distances. We also find that the feature elements are often from heterogeneous sources that may have different influence on similarity estimation. Therefore, the assumption of single isotropic distribution model is often inappropriate. To alleviate this problem, we use a boosted distance measure framework that finds multiple distance measures which fit the distribution of selected feature elements best for accurate similarity estimation. The new distance measures for similarity estimation are tested on two applications: stereo matching and motion tracking in video sequences. The performance of boosted distance measure is further evaluated on several benchmark data sets from the UCI repository and two image retrieval applications. In all the experiments, robust results are obtained based on the proposed methods. 相似文献
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Curve-skeleton properties, applications, and algorithms 总被引:7,自引:0,他引:7
Cornea ND Silver D Min P 《IEEE transactions on visualization and computer graphics》2007,13(3):530-548
Curve-skeletons are thinned 1D representations of 3D objects useful for many visualization tasks including virtual navigation, reduced-model formulation, visualization improvement, animation, etc. There are many algorithms in the literature describing extraction methodologies for different applications; however, it is unclear how general and robust they are. In this paper, we provide an overview of many curve-skeleton applications and compile a set of desired properties of such representations. We also give a taxonomy of methods and analyze the advantages and drawbacks of each class of algorithms 相似文献
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Aaron J. Welsh Denis Dezest Liviu Nicu Susan Trolier‐McKinstry 《Journal of the American Ceramic Society》2017,100(3):848-858
The functional properties of electroceramic thin films can be degraded by subtractive patterning techniques used for microelectromechanical (MEMS) applications. This work explores an alternative deposition technique, where lead zirconate titanate (PZT) liquid precursors are printed onto substrates in a desired geometry from stamp wells (rather than stamp protrusions). Printing from wells significantly increased sidewall angles (from ~1 to >35 degrees) relative to printing solutions from stamp protrusions. Arrays of PZT features were printed, characterized, and compared to continuous PZT thin films of similar thickness. Three‐hundred‐nanometer‐thick printed PZT features exhibit a permittivity of 730 and a loss tangent of 0.022. The features showed remanent polarizations of 26 μC/cm2, and coercive fields of 95 kV/cm. The piezoelectric response of the features produced an e31,f of ?5.2 C/m2. This technique was also used to print directly atop prepatterned substrates. Optimization of printing parameters yielded patterned films with 90° sidewalls. Lateral feature sizes ranged from hundreds of micrometers down to one micrometer. In addition, several device designs were prepatterned onto silicon on insulator (SOI) wafers (Si/SiO2/Si with thicknesses of 0.35/1/500 μm). The top patterned silicon was released from the underlying material, and PZT was directly printed and crystallized on the free‐standing structures. 相似文献
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Nicu Bizon 《Progress in Photovoltaics: Research and Applications》2016,24(5):600-622
A new perturbed‐based extremum seeking control (PESC) scheme is proposed in this paper to track the global maximum power point (GMPP). The PESC scheme has two control loops based on power of the photovoltaic (PV) array: the first loop operates as usually to track the maximum power point and the second sweeps all local MPPs to locate the GMPP. Once the GMPP is located based on its uniqueness (after the PV pattern is quickly scanned many times, depending on the PV pattern's profile), the GMPP is accurately tracked based on first control loop. The used PV patterns have the profile of the PV power characteristics obtained for PV array under partially shaded conditions (PSCs). This PESC scheme is proposed to track the GMPP in the PV applications, but also in other multimodal problems from industry, being a good motif to revive the specialists' interest for the extremum seeking control field. The results obtained here are very promising for both search speed and tracking accuracy performances of the GMPP under different PSCs simulated on the PV array. Thus, the energy efficiency of PV array controlled with the proposed PESC scheme will increase with more than 1.2% in comparison with that obtained with the other MPP algorithms because of better performance shown by this PESC scheme. A 99.6% tracking accuracy is obtained here in comparison with a maximum 98.4% tracking accuracy reported in the literature. Furthermore, 100% hit and high search speed are obtained here for the GMPP localization. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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With the explosive broadcast of multimedia (text documents, image, video etc.) in our life, how to annotate, search, index,
browse and relate various forms of information efficiently becomes more and more important. Combining these challenges by
relating them to user preference and customization only complicates the matter further. The goal of this survey is to give
an overview of the current situation in the branches of research that are involved in annotation, relation and presentation
to a user by preference. This paper will present some current models and techniques being researched to model ontology, preference,
context, and presentation and bring them together in a chain of ideas that leads from raw uninformed data to an actual usable
user interface that adapts with user preference and customization. 相似文献
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Computing hierarchical curve-skeletons of 3D objects 总被引:6,自引:0,他引:6
Nicu D. Cornea Deborah Silver Xiaosong Yuan Raman Balasubramanian 《The Visual computer》2005,21(11):945-955
A curve-skeleton of a 3D object is a stick-like figure or centerline representation of that object. It is used for diverse
applications, including virtual colonoscopy and animation. In this paper, we introduce the concept of hierarchical curve-skeletons
and describe a general and robust methodology that computes a family of increasingly detailed curve-skeletons. The algorithm
is based upon computing a repulsive force field over a discretization of the 3D object and using topological characteristics
of the resulting vector field, such as critical points and critical curves, to extract the curve-skeleton. We demonstrate
this method on many different types of 3D objects (volumetric, polygonal and scattered point sets) and discuss various extensions
of this approach. 相似文献