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Robust spatio-temporal descriptors for real-time SVM-based fall detection
Imen Charfi;Johel Miteran;Julien Dubois;Barthélémy Heyrman;Mohamed Atri
2014 World Symposium on Computer Applications & Research (WSCAR)
Year: 2014 | Conference Paper |
Cited by: Papers (3)
We propose a SVM-based approach to detect falls in several home environments using an optimised descriptor adapted to real-time tasks.We build an optimised spatio-temporal descriptor named STHFa_SBFS using several combinations of transformations of geometrical features, thanks to feature selection. We study the combinations of usual transformations of the features (Fourier Transform, Wavelet trans...Show More
Definition and Performance Evaluation of a Robust SVM Based Fall Detection Solution
Imen Charfi;Johel Miteran;Julien Dubois;Mohamed Atri;Rached Tourki
2012 Eighth International Conference on Signal Image Technology and Internet Based Systems
Year: 2012 | Conference Paper |
Cited by: Papers (101)
We propose an automatic approach to detect falls in home environment. A Support Vector Machine based classifier is fed by a set of selected features extracted from human body silhouette tracking. The classifier is followed by filtering operations taking into account the temporal nature of a video. The features are based on height and width of human body bounding box, the user's trajectory with her...Show More
An efficient hardware implementation of Diamond Search motion estimation using CAL dataflow language
Wajdi Elhamzi;Richard Thavot;Julien Dubois;Jérôme Gorin;Mohamed Atri;Johel Miteran;Rached Tourki
Motion estimation represents a key module in video compression. The Reconfigurable Video Coding context (RVC) requires proposing a flexible solution for motion estimation. The motion estimation performance should be modified to fit with the user or the environment's constraints. Depending on the required performances fixed by the application, a full search is sometimes not suitable, hence, alterna...Show More
«Motion Estimation Accelerator with User Search Strategy in an RVC Context»
Julien Dubois;Richard Thavot;Romuald Mosqueron;Johel Miteran;Christophe Lucarz
2009 16th IEEE International Conference on Image Processing (ICIP)
Year: 2009 | Conference Paper |
Cited by: Papers (2)
Motion estimation represents a key module in video compression. The RVC context requires proposing a flexible solution for motion estimation. According to the nature of the application, a full search is sometimes not suitable, hence, alternative fast/reduced solutions should be considered. This paper proposes a model and implementation of a flexible motion estimation engine, which can be configure...Show More
Lossless Image Compression Using Burrows Wheeler Transform (Methods and Techniques)
Elfitrin Syahrul;Julien Dubois;Vincent Vajnovszki;Taoufik Saidani;Mohamed Atri
2008 IEEE International Conference on Signal Image Technology and Internet Based Systems
Year: 2008 | Conference Paper |
The burrows-wheeler transform (BWT) is a combinatorial algorithm originally created for text compression such as bzip2, and that has been recently applied to image compression field. This paper focuses on the impact of compression scheme based on the combinatorial transform on high-level resolution medical images. It overviews the original scheme and some improvements that have been develop in pos...Show More
Hardware implementation of boosting based object detection using a high level description
2008 IEEE International Symposium on Industrial Electronics
Year: 2008 | Conference Paper |
The face detection is a fundamental prerequisite step in the process of face recognition. The focus of this paper is the implementation of a real time embedded face detection system while relying on high level description language such as SystemC. Recently, the boosting based object detection algorithms proposed by have gained a lot of attention and are considered as the fastest accurate object de...Show More
A co-design platform for algorithm/architecture design exploration
2008 IEEE International Conference on Multimedia and Expo
Year: 2008 | Conference Paper |
Cited by: Papers (2)
The efficient implementation of multimedia algorithms, for the ever increasing complexity of the specifications and the emergence of the new generation of processing platforms characterized by multicore and multicomponent parallel architectures, requires appropriate design space exploration procedures as preliminary step for any implementation. This paper describes a new platform aiming at support...Show More
Embedded System Study for Real Time Boosting Based Face Detection
IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics
Year: 2006 | Conference Paper |
Cited by: Papers (8)
This paper describes a study for a real time embedded face detection system. Recently, the boosting based face detection algorithms proposed by [(Viola, P and Jone, M, 2001); (Lienhart, R, et al., 2003)] have gained a lot of attention and are considered as the fastest accurate face detection algorithms today. However, the embedded implementation of such algorithms into hardware is still a challeng...Show More
Configurable motion-estimation hardware accelerator module for the MPEG-4 reference hardware description platform
IEEE International Conference on Image Processing 2005
Year: 2005 | Conference Paper |
Cited by: Papers (8)
This paper describes a motion estimation co-processor architecture that explicitly separates the implementation stages consisting of data access to the search window and the evaluation of the matching criterion from the implementation of the search strategy. The architecture is modular and can be re-configured according to the different MPEG video coding profiles and level parameters. Although the...Show More
Boosting: From data to hardware using automatic implementation tool
2004 12th European Signal Processing Conference
Year: 2004 | Conference Paper |
We propose a method of automatic hardware implementation of a decision rule based on the Adaboost algorithm. We review the principles of the classification method and we evaluate its hardware implementation cost in term of FPGA's slice, using different weak classifiers based on the general concept of hyperrectangle. We show how to combine the weak classifiers in order to find an efficient trade-of...Show More
Embedded co-processor architecture for CMOS based image acquisition
Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429)
Year: 2003 | Conference Paper |
This paper describes a new co-processor architecture designed for CMOS sensor imaging. The co-processor unit is integrated into the image acquisition loop so as to exploit the full potential of CMOS selective access imaging technology. The processing features of the co-processor are functional to the specific acquisition process of CMOS sensors (random region acquisition, variable image size, vari...Show More
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