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Displaying 1-50 out of 56 total
Indexing Large Online Multimedia Repositories Using Semantic Expansion and Visual Analysis
Found in: IEEE MultiMedia
By Xavier Sevillano,Tomas Piatrik,Krishna Chandramouli,Qianni Zhang,Ebroul Izquierdo
Issue Date:July 2012
pp. 53-61
The proposed framework automatically predicts user tags for online videos from their visual features and associated textual metadata, which is semantically expanded using complementary textual resources.
 
Pyramidal Model for Image Semantic Segmentation
Found in: Pattern Recognition, International Conference on
By Giuseppe Passino, Ioannis Patras, Ebroul Izquierdo
Issue Date:August 2010
pp. 1554-1557
We present a new hierarchical model applied to the problem of image semantic segmentation, that is, the association to each pixel in an image with a category label (e.g. tree, cow, building, .). This problem is usually addressed with a combination of an ap...
 
An O-FDP Framework in 3D Model Based Reconstruction
Found in: Conference, International Asia-Pacific Web
By Karthikeyan Vaiapury, Ebroul Izquierdo
Issue Date:April 2010
pp. 424-429
Three dimensional scene synthesis and analysis has drawn considerable attention in manufacturing industries due to its multifaceted applications ranging from real time recognition, verification, vehicle guidance etc. Nowadays, there is a growing surge in F...
 
A Multi-Pattern Search Algorithm for Block Motion Estimation in Video Coding
Found in: Conference, International Asia-Pacific Web
By Muhammad Akram, Ebroul Izquierdo
Issue Date:April 2010
pp. 407-410
In this paper, we propose a novel multi-pattern based search technique, TCon search, for fast block matching motion estimation. It starts with small cross shaped and small triangular shaped patterns. Afterwards, based on the previous step optimal motion ve...
 
Local Wavelet Features for Statistical Object Classification and Localization
Found in: IEEE Multimedia
By Marcin Grzegorzek, Sorin Sav, Noel E. O'Connor, Ebroul Izquierdo
Issue Date:January 2010
pp. 56-66
<p>This article presents a system for texture-based probabilistic classification and localization of 3D objects in 2D digital images and discusses selected applications.</p>
 
Semantic Object Based Retrieval from Surveillance Videos
Found in: Semantic Media Adaptation and Personalization, International Workshop on
By Virginia Fernandez, Krishna Chandramouli, Ebroul Izquierdo
Issue Date:December 2009
pp. 79-83
In recent years, due to technological developments, the use of Closed-Circuit Television monitoring has been widely used not only in public areas but also in confined and/or private spaces for improved personal safety and security. The increased data acqui...
 
Random Methods for Fast Exploration of the Raw Video Material
Found in: Database and Expert Systems Applications, International Workshop on
By Tijana Janjusevic, Sergio Benini, Ebroul Izquierdo, Riccardo Leonardi
Issue Date:September 2009
pp. 226-230
In this work we propose a visualization and access method for exploring a database of raw video material, where the span of information stored can be huge and difficult to understand at a glance. Developed visual mining tool presents the overview of the hi...
 
Visualising the Query Space of the Image Collection
Found in: Information Visualisation, International Conference on
By Tijana Janjusevic, Ebroul Izquierdo
Issue Date:July 2009
pp. 86-91
In this paper, we propose an information visualisation solution for multimedia retrieval based on semantic concepts defined in an image database. The proposed visualisation approach utilises concept map, Venn diagram and Fisheye distortion to enable effect...
 
Hierarchical Summarisation of Video Using Ant-Tree Strategy
Found in: Content-Based Multimedia Indexing, International Workshop on
By Tomas Piatrik, Ebroul Izquierdo
Issue Date:June 2009
pp. 107-112
Video summarisation approaches have various fields of application, specifically related to organising, browsing and accessing large video databases. In this paper, the appropriateness of biologically inspired models to tackle these problems is discussed an...
 
Context awareness in graph-based image semantic segmentation via visual word distributions
Found in: Image Analysis for Multimedia Interactive Services, International Workshop on
By Giuseppe Passino, Ioannis Patras, Ebroul Izquierdo
Issue Date:May 2009
pp. 33-36
This paper addresses the problem of image semantic segmentation (or semantic labelling), that is the association of one of a predefined set of semantic categories (e.g. cow, car, face) to each image pixel. We adopt a patch-based approach, in which super-pi...
 
CAE-L: An Ontology Modelling Cultural Behaviour in Adaptive Education
Found in: Semantic Media Adaptation and Personalization, International Workshop on
By Krishna Chandramouli, Craig Stewart, Tim Brailsford, Ebroul Izquierdo
Issue Date:December 2008
pp. 183-188
The presentation of learning materials in Adaptive Education Hypermedia is influenced by several factors such as learning style, background knowledge and cultural background, to name a few. In this paper, we introduce the notion of the CAE-L Ontology for m...
 
Cultural Artefacts in Education: Analysis, Ontologies and Implementation
Found in: Computer Science and Software Engineering, International Conference on
By Craig Stewart, Krishna Chandramouli, Alexandra Cristea, Tim Brailsford, Ebroul Izquierdo
Issue Date:December 2008
pp. 706-709
Adaptive web technologies are often used in distance learning scenarios with little regard for learners’ cultural background. The CAE questionnaire determines the cultural artefacts that influence a learners behaviour within an educational environment. Thi...
 
Efficient Text Color Modulation for Printed Side Communications and Data Hiding
Found in: Graphics, Patterns and Images, SIBGRAPI Conference on
By Paulo Vinicius Koerich Borges, Ebroul Izquierdo, Joceli Mayer
Issue Date:October 2008
pp. 79-86
This paper improves the use of text color modulation (TCM) as a reliable text document data hiding method. Using TCM, the characters in a document have their color components modified (possibly unperceptually) according to a side message to be embedded. Th...
 
Layout Methods for Intuitive Partitioning of Visualization Space
Found in: Information Visualisation, International Conference on
By Tijana Janjusevic, Ebroul Izquierdo
Issue Date:July 2008
pp. 88-93
In this paper we address two relevant tasks in image visualisation research: layout methods for presenting content and relations within image databases; and optimal solutions for efficient use of the entire display space. We introduce a novel approach to e...
 
Event Detection and Clustering for Surveillance Video Summarization
Found in: Image Analysis for Multimedia Interactive Services, International Workshop on
By Uros Damnjanovic, Virginia Fernandez, Ebroul Izquierdo, José María Martinez
Issue Date:May 2008
pp. 63-66
The target of surveillance summarization is to identify high-value information events in a video stream and to present it to a user. In this paper we present surveillance summarization approach using detection and clustering of important events. Assuming t...
 
Global-to-Local Oriented Rapid Scene Perception
Found in: Image Analysis for Multimedia Interactive Services, International Workshop on
By Le Dong, Ebroul Izquierdo
Issue Date:May 2008
pp. 155-158
An approach for rapid scene perception from global layout to local features is presented. The representation of a complex scene is initially built from a collection of global features from which properties related to the spatial layout of the scene and its...
 
Describing Objects with Multiple Features for Visual Information Retrieval and Annotation
Found in: Image Analysis for Multimedia Interactive Services, International Workshop on
By Qianni Zhang, Ebroul Izquierdo
Issue Date:May 2008
pp. 80-83
This paper describes how a multi-feature merging approach can be applied in semantic-based visual information retrieval and annotation. The goal is to identify the key visual patterns of specific objects from either static images or video frames. It is sho...
 
Efficient side information encoding for text hardcopy documents
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Paulo Borges, Ebroul Izquierdo, Joceli Mayer
Issue Date:September 2007
pp. 552-557
This paper proposes a new coding method that increases significantly the signal-to-watermark ratio in document watermarking algorithms. A possible approach to text document watermarking is to consider text characters as a data structure consisting of sever...
 
K-Space Content Management and Retrieval System
Found in: Image Analysis and Processing Workshops, International Conference of
By Ebroul Izquierdo, Krishna Chandramouli, Marcin Grzegorzek, Tomas Piatrik
Issue Date:September 2007
pp. 131-136
In this contribution, the so-called
 
Optimised Motion Estimation for Robust Video Coding in Packet Loss Environment
Found in: Image Analysis for Multimedia Interactive Services, International Workshop on
By Fuzheng Yang, Shuai Wan, Ebroul Izquierdo
Issue Date:June 2007
pp. 50
An improved motion estimation method for robust video coding is proposed. It is designed to enhance packet loss resilience in lossy environments. The proposed motion estimation is based on an end-to-end rate-distortion optimisation framework. Initially, th...
 
Empirical Analysis of Libs Images for Ovarian Cancer Detection
Found in: Image Analysis for Multimedia Interactive Services, International Workshop on
By Claude Tameze, Robert Vincelette, Noureddine Melikechi, Vesna Zeljkovic, Ebroul Izquierdo
Issue Date:June 2007
pp. 76
<p>To develop a way to detect early epithelial ovarian cancer we expose blood samples to a laser. Using Laser induced breakdown spectroscopy, (LIBS) plasma images of the blood samples are generated and analyzed. In this paper we compare the images fr...
 
A Topology Preserving Approach for Image Classification
Found in: Image Analysis for Multimedia Interactive Services, International Workshop on
By Le Dong, Ebroul Izquierdo
Issue Date:June 2007
pp. 7
In this paper, an approach for image analysis and classification is presented. It is based on a topology preserving approach to automatically create a relevance map from salient areas in natural images. It also derives a set of well-structured representati...
 
Climbing the Semantic Ladder: Towards Semantic Semi--Automatic Image Annotation using MPEG--7 Descriptor Schemas
Found in: Computer Architectures for Machine Perception, International Workshop on
By Ebroul Izquierdo, Andres Dorado
Issue Date:July 2005
pp. 257-262
The fast development of innovative tools to create user friendly and effective multimedia libraries, services and environments requires novel concepts to support storage, annotation and retrieval of huge amounts of digital audiovisual data. This article pr...
 
Compact Hierarchical Image Descriptors
Found in: Information Visualisation, International Conference on
By Ebroul Izquierdo
Issue Date:July 2002
pp. 627
An efficient approach for image annotation and retrieval is presented. The main objective is to overcome the speed limitations of existing video indexing and retrieval systems. A family of successively simplified image descriptors is defined using colour h...
 
Computational Experiments with Area-Based Stereo for Image-Based Rendering
Found in: 3D Data Processing Visualization and Transmission, International Symposium on
By Ebroul Izquierdo
Issue Date:June 2002
pp. 168
In this paper two disparity estimators with different complexity degrees are described and used to examine how much disparity inaccuracies influence image rendering quality. The objective of this study is to design software-based image synthesis in real-ti...
 
Efficient Key-Frame Extraction and Video Analysis
Found in: Information Technology: Coding and Computing, International Conference on
By Janko Calic, Ebroul Izquierdo
Issue Date:April 2002
pp. 0028
Content based video indexing and retrieval has its foundations in the analyses of the prime video temporal structures. Consequently, technologies for video segmentation and key-frame extraction have become crucial for the development of advanced digital vi...
 
Linear Programming Concept Visualization
Found in: Information Visualisation, International Conference on
By Jean Pierre Charalambos, Ebroul Izquierdo
Issue Date:July 2001
pp. 0529
Abstract: A visualization scheme as a tool to find the solution of any 3D-linear programming problem is introduced. The presented approach is highly suitable to draw and visualize interactively the feasible region of a given 3D-linear programming problem. ...
 
Image Based Rendering Using Rational Filters
Found in: Information Visualisation, International Conference on
By Ebroul Izquierdo
Issue Date:July 2001
pp. 0311
Abstract: Image-based rendering is a powerful technique for 3D object visualization and representation. Using this approach arbitrary object or scene views are generated automatically from a small set of real reference images. In this paper an algorithm fo...
 
Video-Based Camera Registration for Augmented Reality
Found in: Information Visualisation, International Conference on
By Ebroul Izquierdo, Valia Guerra
Issue Date:July 2000
pp. 499
In this paper, a video-based approach for camera scene registration in augmented reality systems is presented. The presented technique relies on the definition of a model, which is derived from an appropriate parametric linear optimization problem. The opt...
 
Video Composition by Spatiotemporal Object Segmentation, 3D-Structure and Tracking
Found in: Information Visualisation, International Conference on
By Ebroul Izquierdo, Mohammed Ghanbari
Issue Date:July 1999
pp. 194
In this paper a stereo vision based system for composition of natural and computer generated images is presented. The system focuses on the solution of four essential tasks in computer vision: disparity estimation, object segmentation, modeling and trackin...
 
Recognizing people by face and body in Photo Collections
Found in: 2013 10th IEEE International Conference on Automatic Face & Gesture Recognition (FG 2013)
By Markus Brenner,Ebroul Izquierdo
Issue Date:April 2013
pp. 1-7
We show how to detect and recognize people based on their faces and bodies in Consumer Photo Collections. We devise a graphical model that incorporates multiple contextual cues to discriminate faces, upper and lower bodies, and ultimately, individuals with...
   
Context Inference in Region-Based Image Retrieval
Found in: Semantic Media Adaptation and Personalization, International Workshop on
By Qianni Zhang, Ebroul Izquierdo
Issue Date:December 2007
pp. 187-192
In this paper, a method for inference of high-level semantic information for image annotation and retrieval is proposed. Bayesian theory is used as a tool to model a belief network to configure semantic labels for image regions. These semantic labels for r...
 
Bringing User Satisfaction to Media Access: The IST BUSMAN Project
Found in: Information Visualisation, International Conference on
By Ebroul Izquierdo, Ivan Damnjanovic, Paulo Villegas, Li-Qun Xu, Stephan Herrmann
Issue Date:July 2004
pp. 444-449
Interactive and seamless access to video content is facilitated by technology that is able to annotate and retrieve media data efficiently and automatically with the minimal human interventions. Media should be accessible by intended users quickly and inde...
 
People recognition using gamified ambiguous feedback
Found in: Proceedings of the First International Workshop on Gamification for Information Retrieval (GamifIR '14)
By Ebroul Izquierdo, Markus Brenner, Navid Mirza
Issue Date:April 2014
pp. 22-26
We present a semi-supervised approach to recognize faces or people while incorporating crowd-sourced and gamified feedback to iteratively improve recognition accuracy. Unlike traditional approaches which are often limited to explicit feedback, we model amb...
     
Multifeature analysis and semantic context learning for image classification
Found in: ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
By Ebroul Izquierdo
Issue Date:May 2013
pp. 1-20
This article introduces an image classification approach in which the semantic context of images and multiple low-level visual features are jointly exploited. The context consists of a set of semantic terms defining the classes to be associated to unclassi...
     
A 3D tele-immersion system based on live captured mesh geometry
Found in: Proceedings of the 4th ACM Multimedia Systems Conference (MMSys '13)
By Dick C. A. Bulterman, Ebroul Izquierdo, Michele Sanna, Pablo Cesar, Rufael Mekuria, Stefano Asioli
Issue Date:February 2013
pp. 24-35
3D Tele-immersion enables participants in remote locations to share, in real-time, an activity. It offers users natural interactivity and immersive experiences, but it challenges current networking solutions. Work in the past has mainly focused on the effi...
     
Graph-based recognition in photo collections using social semantics
Found in: Proceedings of the 2011 ACM workshop on Social and behavioural networked media access (SBNMA '11)
By Ebroul Izquierdo, Markus Brenner
Issue Date:December 2011
pp. 47-52
In this paper, we show how to recognize people in Consumer Photo Collections by employing a graphical model together with a distance-based face description method. We devise a graph design and explore ways to further improve the recognition performance by ...
     
Gaze movement inference for user adapted image annotation and retrieval
Found in: Proceedings of the 2011 ACM workshop on Social and behavioural networked media access (SBNMA '11)
By Ebroul Izquierdo, Michael Proulx, S. Navid H. Haji Mirza
Issue Date:December 2011
pp. 27-32
In media personalisation the media provider needs to receive feedbacks from its users to adapt media contents used for interaction. At the current stage this feedback is limited to mouse clicks and keyboard entries. This report explores the possible soluti...
     
Social networked media: advances and trends
Found in: Proceedings of the 2011 ACM workshop on Social and behavioural networked media access (SBNMA '11)
By Ebroul Izquierdo
Issue Date:December 2011
pp. 1-2
This paper provides an overview of major issues and challenges for social networked media, as presented during the keynote by the author at SBNMA: ACM Workshop on Social, Behavioural Networked Media Access.
     
Enhanced visualisation of dance performance from automatically synchronised multimodal recordings
Found in: Proceedings of the 19th ACM international conference on Multimedia (MM '11)
By Cyril Concolato, Ebroul Izquierdo, Jean Lefeuvre, Marc Gowing, Noel E. O'Connor, Philip Kell, Qianni Zhang, Robin Tournemenne, Slim Essid, Vlado Kitanovski, Xinyu Lin
Issue Date:November 2011
pp. 667-670
The Huawei/3DLife Grand Challenge Dataset provides multimodal recordings of Salsa dancing, consisting of audiovisual streams along with depth maps and inertial measurements. In this paper, we propose a system for augmented reality-based evaluations of Sals...
     
GrabcutD: improved grabcut using depth information
Found in: Proceedings of the 2010 ACM workshop on Surreal media and virtual cloning (SMVC '10)
By Anil Aksay, Ebroul Izquierdo, Karthikeyan Vaiapury
Issue Date:October 2010
pp. 57-62
Popular state of the art segmentation methods such as Grab cut include a matting technique to calculate the alpha values for boundaries of segmented regions. Conventional Grabcut relies only on color information to achieve segmentation. Recently, there hav...
     
Towards an expressive virtual tutor: an implementation of a virtual tutor based on an empirical study of non-verbal behaviour
Found in: Proceedings of the 2010 ACM workshop on Surreal media and virtual cloning (SMVC '10)
By Ebroul Izquierdo, Iordanis Biperis, Krishna Chandramouli, Maher Ben Moussa, Nadia Magnenat-Thalmann, Petros Daras, Qianni Zhang, Seyed Navid Haji Mirza, Zerrin Kasap
Issue Date:October 2010
pp. 39-44
In this paper we investigate the non-verbal behaviour of a tutor and propose a model for ECAs (Embodied Conversational Agents) acting as virtual tutors. We have conducted an empirical study where we focused on the distribution of gaze, head and eyebrowns b...
     
Analysing multimedia content in social networking environments
Found in: Proceedings of the 2010 ACM workshop on Social, adaptive and personalized multimedia interaction and access (SAPMIA '10)
By Charalampos Patrikakis, Ebroul Izquierdo, Naeem Ramzan, Qianni Zhang
Issue Date:October 2010
pp. 73-76
Social and Peer-to-Peer (P2P) networks have received considerable interest in recent decades due to its focus on analysis and relationships among entities and on the patterns and implications of these relationships. In the meantime, with the rapid increase...
     
Finding the user's interest level from their eyes
Found in: Proceedings of the 2010 ACM workshop on Social, adaptive and personalized multimedia interaction and access (SAPMIA '10)
By Ebroul Izquierdo, Seyed Navid Haji Mirza
Issue Date:October 2010
pp. 25-28
An innovative model is proposed that empowers the semi-automatic image annotation algorithms with the implicit feedback of the users' eyes. This frame work extracts the features from the users' gaze pattern over an image by the help of the eye-trackers and...
     
Concept based interactive retrieval for social environment
Found in: Proceedings of the 2010 ACM workshop on Social, adaptive and personalized multimedia interaction and access (SAPMIA '10)
By Ebroul Izquierdo, Krishna Chandramouli, Qianni Zhang, Tijana Janjusevic
Issue Date:October 2010
pp. 15-20
Following the recent developments in social networking, there is an emerging interest to share experiences online with social peers through multimedia data. Consequently, exponential amount of multimedia information has been generated by everyday users and...
     
Subjective evaluation of scalable video coding for content distribution
Found in: Proceedings of the international conference on Multimedia (MM '10)
By Ebroul Izquierdo, Engin Kurutepe, Francesca De Simone, Jorn Ostermann, Jong-Seok Lee, Naeem Ramzan, Thomas Sikora, Touradj Ebrahimi, Zhijie Zhao
Issue Date:October 2010
pp. 65-72
This paper investigates the influence of the combination of the scalability parameters in scalable video coding (SVC) schemes on the subjective visual quality. We aim at providing guidelines for an adaptation strategy of SVC that can select the optimal sca...
     
An interactive framework for image annotation through gaming
Found in: Proceedings of the international conference on Multimedia information retrieval (MIR '10)
By Ebroul Izquierdo, Lasantha Seneviratne
Issue Date:March 2010
pp. 517-526
Image indexing is one of the most difficult challenges facing the computer vision community. Addressing this issue, we designed an innovative approach to obtain an accurate label for images by taking into account the social aspects of human-based computati...
     
Semantic structuring and retrieval of event chapters in social photo collections
Found in: Proceedings of the international conference on Multimedia information retrieval (MIR '10)
By Ebroul Izquierdo, Krishna Chandramouli
Issue Date:March 2010
pp. 507-516
The phenomenal growth of multimedia content on the web over the last couple of decades has paved the way for content management systems integrating intelligent information retrieval and indexing techniques. Also, in order to improve the performance of retr...
     
Combining image captions and visual analysis for image concept classification
Found in: Proceedings of the 9th International Workshop on Multimedia Data Mining: held in conjunction with the ACM SIGKDD 2008 (MDM '08)
By Ebroul Izquierdo, Jan Nemrava, Krishna Chandramouli, Tomas Kliegr, Vojtech Svatek
Issue Date:August 2008
pp. 8-17
We present a framework for efficiently exploiting free-text annotations as a complementary resource to image classification. A novel approach called Semantic Concept Mapping (SCM) is used to classify entities occurring in the text to a custom-defined set o...
     
Perceptual watermarking using just noticeable difference model based on block classification
Found in: Proceedings of the 2nd international conference on Mobile multimedia communications (MobiMedia '06)
By Ebroul Izquierdo, Ivan Damnjanovic
Issue Date:September 2006
pp. 1-40
One of the main goals of watermarking is to optimize capacity while preserving high video fidelity. The perceptual adjustment of the watermark is mainly based on Watson Just Noticeable Difference (JND) model. Recently, it was proposed to improve Watson mod...
     
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