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Multimedia security means protecting multimedia information and information systems from unauthorized access, use, disclosure, disruption, modification, inspection, recording and destruction. The “Video Copy Detection” system is based on detecting video copies from a video sample to avoid copyright violations. Video fingerprinting is one of methods for video copy detection, including steps of video...
It is quite common and easy to modify graphics with special effects using multimedia software applications. Graphical effects might able to direct visual attention of the audience to the foci of the graphic presentation. This paper intends to demonstrate two different approaches on preparing the instructional graphics with special effects and to use eye tracking for analyzing the performances in terms...
In this paper, we propose a reversible data hiding method based on pixel difference histogram shifting and ripple strategy. Because the local area has similar pixel value distribution in the natural image, the pixel differences will be narrowed down within a small range. The ripple strategy is used to calculate the pixel difference using the pixels in the outer ripple to subtract the pixels in the...
Depth maps based action recognition has been received much research attention in recent years due to its robustness to environmental elements in capturing and its relatively well performance in protecting user's privacy. Taking the captured sequential depth maps as inputs, we propose a framework in this paper to recognize actions from such data. We first recover multi-view 2D observations in each...
In this work, we focus on the novel problem of analyzing individual user's behavioral patterns regarding images shared on social forums. In particular, we view diverse user activities on social multimedia services as an economy, where the first activity mode of sharing or posting is interpreted as supply, and another mode of activity such as commenting on images is interpreted as consumption. To characterize...
Unlike traditional multimedia content, content generated on social media platforms such as YouTube, Flickr etc are usually annotated with rich set of social tags such as keywords, textual description, category information, author's profile etc. In this paper we investigate the use of such social tag information for visual diversification of image search results in Flickr. We model search result diversity...
In recent years, several data hiding techniques have been developed. Hsiao and Chang proposed a data hiding scheme in 2011. This approach utilizes just noticeable distortion (JND) techniques to determine whether a pixel can be included in hidden information based on its value, but the calculation procedure is very complex. Therefore, our research seeks to improve Hsiao and Chang's method through the...
Scalable video summarization has emerged as an important problem in present day multimedia applications. Effective summaries need to be provided to the users for videos of any duration at low computational cost. In this paper, we propose a framework which is scalable during both the analysis and the generation stages of video summarization. The problem of scalable video summarization is modeled as...
Multimedia retrieval demands better efficience and accuracy to satisfy increasing extensive application. Since multimedia is enormous with various elements and complex features, it will waste storage to manage it with traditional RDBMS. Combined with researches on sparse database, this research explores how to use sparse database to manage multimedia and perform characteristic-based retrieval on it...
Multimedia annotation algorithms infer localized metadata in multimedia content, e.g. Speakers' voices or subjects' faces. There is a growing need of experts from this domain to perform advanced analyses, that go beyond medium-scale quality metrics. This paper describes a novel visual tool, that addresses the concerns of multimedia experts using interactive visualization principles. Multiple coordinated...
This paper describes the design and development of histoGraph, an interactive tool for explorative visualization and collaborative investigation of historical social networks from multimedia collections. Developed in an interdisciplinary collaboration of computer scientists, historians, HCI researchers and interface designers, the tool aims at supporting historians in the discovery and historical...
In the past, several automatic video summarization systems had been proposed to generate video summary. However, a generic video summary that is generated based only on audio, visual and textual saliencies will not satisfy every user. This paper proposes a novel system for generating semantically meaningful personalized video summaries, which are tailored to the individual user's preferences over...
The present paper focuses on the extraction and evaluation of salient audiovisual features for the prediction of the encoding requirements in multimedia learning content. Decisions over audiovisual encoding are related to the perceived quality of experience (QoE), but also to the physical attributes of initial material (i.e. resolution, color range, motion activity, audio dynamic range, bandwidth,...
In the era of big data, the use of formal models and techniques to represent and manage information is a necessary task to implement efficient intelligent information systems. In this paper we propose a complete framework to annotate and categorize images. Our approach is based on multimedia ontologies organized following a formal model to represent knowledge. Our ontologies use multimedia data and...
This paper presents the game mechanics-based learning management platform called GLABS (acronym created from "Gamified LABoratorieS"). Currently we can find different educational management systems, but are based on the management of qualifications, support, discussions, or work assignments. The application of game mechanics in some of them there, but is very limited, allowing the inclusion...
In this paper, an Augmented Reality system for the Connected TV is presented through a Hypervideo platform implementation. The Hypervideo platform consists of a backoffice to manage audiovisual content and hot-spots, and an interactive video player based in HbbTV technology. The player lets the user get additional information of the points of interest which are displayed over the images. This project...
This article summarizes the project Bibliographic Resources Manager using knowledge maps that involved the development of an application for the representation of bibliographic information (books, theses, and Multimedia Guide) of the centers of the Universidad Técnica Particular de Loja-UTPL, through a knowledge map using semantic technologies.
The automatic indexing of images and videos is a highly relevant and important research area in the field of multimedia information retrieval. The difficulty of this task is no longer something to prove. The majority of the efforts of the research community have been focused in the past on the detection of single concepts in images/videos, which is already a hard task. With the evolution of the information...
Video summarization has been a core problem to manage the growing amount of content in multimedia databases. An efficient video summary should display an overview of the video content and most of existing approaches fulfil this goal. However the information does not allow user to get all details of interest selectively and progressively. This paper proposes a scalable video summarization approach...
In this paper we present a serious game design for HTML5 multi cross-platform environment. Previously existing application were restricted to their specific platforms and users could not enjoy them elsewhere (Smart phones, pc, Smart TV). In this paper we take advantage of the HTML5 multi cross-platform and make use of Smart TV technology in order to bring a new type of content to the big screen where...
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