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AViTExt: Automatic Video Text Extraction: A new Approach for video content indexing Application

AViTExt: Automatic Video Text Extraction: A new Approach for...

引用

3rd International Conference on information and Communication Technologies, vol.2

作者： Baseem Bouaziz Tarek Zlitni Walid Mahdi Multimedia Information systems and Advanced Computing Laboratory Sfax Tunisia

In this paper, we propose a spatial temporal video-text detection technique which proceed in two principal steps: potential text region detection and a filtering process. In the first step we divide dynamically each pair of consecutive video frames into sub block in order to detect change. A significant difference between homologous blocks implies the appearance of an important object which may be a text region. The temporal redundancy is then used to filter these regions and forms an effective text region. The experimentation driven on a variety of video sequences shows the effectiveness of our approach by obtaining a 89,39% as precision rate and 90,19 as recall.

关键词： Component Video indexing and browsing Spatiotemporal approach Text extractin Non compressed video Multiple-frame

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Automatic hybrid approach for lip POI localization: Application for Lip-reading System

Automatic hybrid approach for lip POI localization: Applicat...

引用

1st International Conference on information and Communication Technology and Accessibility, ICTA 2007

作者： Werda, Salah Mahdi, Walid Hamadou, Abdelmajid Ben MIRACL: Multimedia Information Systems and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia Sfax Tunisia

ISBN: (纸本)9789973879141

Automatic Lip-reading system is one of the different assistive technologies for hearing impaired or elderly people. We can imagine, for example, a dependent person ordering a machine with an easy lip movement or by a simple visemes (visual phoneme) pronunciation. The need for an automatic lip-reading system is ever increasing. The lip-reading system is decomposed in three subsystems, first we have the lip localization system, which localizes the lips in the digital input, then there is the feature extracting system, and finally we have the classification system, which maps feature vectors to visemes. The major difficulty of the lip-reading system is the extraction of the visual speech descriptors. In fact, to ensure this task it is necessary to carry out an automatic localization and tracking of the labial gestures. We present in this paper a new automatic approach for lip POI localization on a speaker's face based on the color information of mouth and a geometrical model of lips. This hybrid solution makes our method more tolerant to noise and artefacts in the image. The algorithm works in natural condition and experiments revealed that our lip POI localization approach for lip-reading purpose is possible using the proposed approach.

关键词： Audition

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Automatic lip localization and feature extraction for lip-reading

Automatic lip localization and feature extraction for lip-re...

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2nd International Conference on Computer Vision Theory and Applications, VISAPP 2007

作者： Werda, Salah Mahdi, Walid Hamadou, Abdelmajid Ben MIRACL : Multimedia Information systems and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia Sfax Tunisia

In recent year, lip-reading systems have received a great attention, since it plays an important role in human communication with computer especially for hearing impaired or elderly people. The need for an automatic lip-reading system is ever increasing. Today, extraction and reliable analysis of facial movements make up an important part in many multimedia systems such as videoconference, low communication systems, lip- reading systems. We can imagine, for example, a dependent person ordering a machine with an easy lip movement or by a simple syllable pronunciation. We present in this paper a new approach for lip localization and feature extraction in a speaker's face. The extracted visual information is then classified in order to recognize the uttered viseme (visual phoneme). To check our system performance we have developed our Automatic Lip Feature Extraction prototype (ALiFE). Experiments revealed that our system recognizes 70.95 % of French digits uttered under natural conditions.

关键词： Feature extraction

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Colour and Geometric based Model for Lip Localisation: Application for Lip-reading System

Colour and Geometric based Model for Lip Localisation: Appli...

引用

International Conference on Image Analysis and Processing

作者： Salah Werda Walid Mahdi Abdelmajid Ben Hamadou MIRACL: Multimedia Information systems and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia Sfax Tunisia Multimedia Information systems and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia Sfax Tunisia

Motivated by humans' ability to lipread, the visual component is considered to yield information in the speech recognition system. The lip-reading is the perception of the speech purely based on observing the talker lip movements. The major difficulty of the lip- reading system is the extraction of the visual speech descriptors. In fact, to ensure this task it is necessary to carry out an automatic localization and tracking of the labial gestures. We present in this paper a new automatic approach for lip and point of interest localization on a speaker's face based both on the color information of mouth and a geometric model of lips. This hybrid solution makes our method more tolerant to noise and artifacts in the image. Experiments revealed that our lip POI localization approach for lip-reading purpose is promising. The presented results show that our system recognizes 94.64 % of French visemes.

关键词： Solid modeling Speech recognition Mouth Lips Data mining Humans Image segmentation Image edge detection multimedia systems multimedia computing

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ALiFE: Automatic lip feature extraction: A new approach for speech recognition application 2

ALiFE: Automatic lip feature extraction: A new approach for ...

引用

2nd International Conference on information and Communication Technologies: From Theory to Applications, ICTTA 2006

作者： Werda, Salah Mahdi, Walid Tmar, Mohamed Hamadou, Abdelmajid Ben MIRACL Multimedia Information Systems and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia Sfax Tunisia

ISBN: (纸本)0780395212

Actually several domains 'general public' are concerned by the utility of visual speech information such as e-learning, Tele-assistance, Human-Machine interaction, etc. The visual information helpfulness is more imperative among people with special needs. We can imagine for example, a dependant people ordered his machine with an easy lip movement or by a simple syllable pronunciation. More than, hard of hearing people normally compensate for their hearing problems by lip-reading as well as listening to the person they are talking to. Therefore, it's very important to create an automatic lip-reading system that resolve partially people hearing problem. We presents in this paper a new hybrid approach named ALiFE to automatically localize lipfeature points in the speaker's face and to carry out a spatial-temporal tracking of these points. ALiFE prototype is evaluated with a multiple speakers under natural conditions. In order to approve our lipfeature extraction approach, we have created a specific audio-visual corpus. The final results show the diferent configuration of the mouth through visemes. Later on these visemes will be associated to relatively precise physical measures. © 2006 IEEE.

关键词： Audition

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A new video images text localization approach based on a fast hough transform

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3rd International Conference on Image Analysis and Recognition, ICIAR 2006

作者： Bouaziz, Bassem Mahdi, Walid Hamadou, Abdelmajid Ben MIRACL Multimedia InfoRmation System and Advanced Computing Laboratory Higher Institute of Computer Science and Multimedia BP 1030 Sfax 69042 Tunisia

ISBN: (纸本)3540448918

The amount of digital video data is increasing over the world. It highlights the need for efficient algorithms that can retrieve this data by content. The full use of this media is currently limited by the opaque nature of the video which prevents content-based access. To facilitate video indexing and browsing, it is essential to allow non-linear access, especially for long programs. This can be achieved by identifying semantic description captured automatically from video story structure. Among these descriptions, text within video frames is considered as rich features that enable a good way for browsing video. In this paper we propose a fast Hough transformation based approach for automatic video frames text localization. Experimental results, that we drove on a large sample of video images issued from portions of news broadcasts, sports program, advertisements and movies, shows that our method is very efficient, capable to locate text regions with different character sizes, directions and styles even in case of complex image background. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Image analysis

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ALiFE: Automatic Lip Feature Extraction: A New Approach for Speech Recognition Application

ALiFE: Automatic Lip Feature Extraction: A New Approach for ...

引用

International Conference on information and Communication Technologies: From Theory to Applications, ICTTA

作者： S. Werda W. Mahdi M. Tmar A. Ben Hamadou MIRACL: Multimedia Information systems and Advanced Advanced Computing Laboratory Higher Institute of Computer Computer Science and Multimedia Sfax Tunisia

Actually several domains `general public' are concerned by the utility of visual speech information such as e-learning, tele-assistance, human-machine interaction, etc. The visual information helpfulness is more imperative among people with special needs. We can imagine for example, a dependant people ordered his machine with an easy lip movement or by a simple syllable pronunciation. More than, hard of hearing people normally compensate for their hearing problems by lip-reading as well as listening to the person they are talking to. Therefore, it's very important to create an automatic lip-reading system that resolve partially people hearing problem. We presents in this paper a new hybrid approach named ALiFE to automatically localize lip feature points in the speaker's face and to carry out a spatial-temporal tracking of these points. ALiFE prototype is evaluated with a multiple speakers under natural conditions. In order to approve our lip feature extraction approach, we have created a specific audio-visual corpus. The final results show the different configuration of the mouth through visemes. Later on these visemes is associated to relatively precise physical measures

关键词： Feature extraction Speech recognition Data mining Lips multimedia systems multimedia computing Auditory system Mouth Irrigation Face detection

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Hybrid evolutionary algorithm with insertion heuristics - For the flexible Job Shop Problem

Hybrid evolutionary algorithm with insertion heuristics - Fo...

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3rd International Conference on Service systems and Service Management

作者： Neifar, Fredj Gzara, Mariem Moukrim, Aziz Loukil, Taicir Multimedia InfoRmation Systems and Advanced Computing Laboratory (MIRACL) Sfax 3018 route M'harza Km 1.5 Tunisia UTC Laboratoire Heudiasyc Centre de Recherches de Royallieu 60205 Compiègne BP 20529 France Laboratoire de Gestion Industrielle et Aide À la Décision (GIAD) Sfax 3018 route de l'aérodrome Km 4.5 Tunisia

ISBN: (纸本)1424404509

This paper presents a hybrid evolutionary algorithm for the flexible job shop problem. We developed and tested new genetic operators. Insertion heuristics have been incorporated into crossover and mutation operators in order to enhance the performance of the genetic search. The approach is tested on a set of standard instances taken from the literature. The empirical experiments are promising and validate the effectiveness of the proposed algorithm.

关键词： scheduling flexible job shop problem evolutionary algorithm insertion heuristics

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Parallel Multi-Objective Evolutionary Algorithm with Multi-Front Equitable Distribution

Parallel Multi-Objective Evolutionary Algorithm with Multi-F...

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International Conference on Grid and Cooperative computing (GCC)

作者： Abdelbasset Essabri Mariem Gzara Taicir Loukil Laboratoire de Gestion Industrielle et d’Aide à la Décision (GIAD) Sfax Tunisia Multimedia Information Systems and Advanced Computing Laboratory Sfax Tunisia

In multi-objective context, the evolutionary approach offers specific mechanisms such as Pareto selection, elitism and diversification. These techniques are proved to be efficient to characterize the Pareto front. However, their high computing time constitutes a major handicap for their expansion. The parallelization of multi-objective evolutionary algorithms (MOEAs) may be an efficient way to overcome this problem. This parallelization aims not only to achieve time saving by distributing the computational effort but also to get benefit from the algorithmic aspect by the cooperation between different populations and evolutionary schemes. In this paper we propose a new parallel multi-objective evolutionary algorithm with multi-front equitable distribution which is based on an elitist technique. Every population evolves differently on a processor and cooperates with the others to preserve genetic diversity and to obtain a set of diversified non dominated solutions

关键词： Evolutionary computation Genetic algorithms Concurrent computing Master-slave Distributed computing Parallel processing Computer industry multimedia systems multimedia computing information systems

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Hybrid Evolutionary Algorithm With Insertion Heuristics For The Flexible Job Shop Problem

Hybrid Evolutionary Algorithm With Insertion Heuristics For ...

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International Conference on Services systems and Services Management, ICSSSM

作者： Fredj Neifar Mariem Gzara Aziz Moukrim Taicir Loukil Multimedia Information Systems and Advanced Computing Laboratory Sfax Tunisia Centre de Recherches de Royallieu UTC Laboratoire Heudiasyc Compiegne France Laboratoire de Gestion industrielle et Aide à la Décision (GIAD) Sfax Tunisia

关键词： Evolutionary computation Job shop scheduling Testing information systems Laboratories Computer industry Genetic mutations NP-hard problem Constitution

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