References of "Verly, Jacques"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailSubjective Evaluation of the Audiovisual Spatial Congruence in the Case of Stereoscopic-3D Video and Wave Field Synthesis
André, Cédric ULg; Corteel, Etienne; Embrechts, Jean-Jacques ULg et al

in International Journal of Human-Computer Studies (2014), 72(1), 23-32

While 3D cinema is becoming increasingly established, little effort has focused on the general problem of producing a 3D sound scene spatially coherent with the visual content of a stereoscopic-3D (s-3D ... [more ▼]

While 3D cinema is becoming increasingly established, little effort has focused on the general problem of producing a 3D sound scene spatially coherent with the visual content of a stereoscopic-3D (s-3D) movie. The perceptual relevance of such spatial audiovisual coherence is of significant interest. In this paper, a subjective experiment is carried out where an angular error between an s-3D video and a spatially accurate sound reproduced through Wave Field Synthesis (WFS) is simulated. The psychometric curve is measured with the method of constant stimuli, and the threshold for bimodal integration is estimated. The impact of the presence of background noise is also investigated. A comparison is made between the case without any background noise and the case with an SNR of 4 dB(A). Estimates of the thresholds and the slopes, as well as their confidence intervals, are obtained for each level of background noise. When background noise was present, the point of subjective equality (PSE) was higher (19.4° instead of 18.3°) and the slope was steeper (-0.077 instead of -0.062 per degree). Because of the overlap between the confidence intervals, however, it was not possible to statistically differentiate between the two levels of noise. The implications for the sound reproduction in a cinema theater are discussed. [less ▲]

Detailed reference viewed: 131 (22 ULg)
Peer Reviewed
See detailStereo matching method using multiple angular signatures matched by multidimensional dynamic time warping (MD-DTW)
Grogna, David ULg; Guerri, Géraldine; Verly, Jacques ULg

in IEEE Xplore Digital Library (2014)

We consider the problem of matching interest points (IPs) extracted from the two images of a stereoscopic pair. We describe each IP via a descriptor consisting in one angular signature for a grayscale ... [more ▼]

We consider the problem of matching interest points (IPs) extracted from the two images of a stereoscopic pair. We describe each IP via a descriptor consisting in one angular signature for a grayscale image, three signatures for a color image, and, more generally, N signatures for N coregistered images of different modalities. Each angular signature is generated by spinning a “steerable x-tapered, y-derivative, half-Gaussian filter” 360° around each IP. The novel contribution of the paper is the use of multidimensional dynamic time warping (MD-DTW) for (1) producing a single, common warping for all pairs of corresponding signatures in the two descriptors of two IPs that are candidate for matching, and (2) for computing a single related distance between the two sets of signatures. Preliminary experimental results and a comparison with the results obtained with SIFT descriptors and matching via the smallest Euclidean distance in parameter space demonstrates the value of this novel approach. [less ▲]

Detailed reference viewed: 49 (12 ULg)
Full Text
Peer Reviewed
See detailComparative evaluation of existing and new methods for correcting ocular artifacts in electroencephalographic recordings
Kirkove, Murielle ULg; François, Clémentine ULg; Verly, Jacques ULg

in Signal Processing (2014), 98(C), 102-120

EEG signals are often contaminated by ocular artifacts (OAs), in particular when they are recorded for a subject that is, in principle, awake, such as in a study of drowsiness. It is generally desirable ... [more ▼]

EEG signals are often contaminated by ocular artifacts (OAs), in particular when they are recorded for a subject that is, in principle, awake, such as in a study of drowsiness. It is generally desirable to detect and/or correct these OAs before interpreting the EEG signals. We have identified 11 existing methods for dealing with OAs. Their study allowed us to create 16 new methods. We performed a comparative performance evaluation of the resulting 27 distinct methods using a common set of data and a common set of metrics. The data was recorded during a driving task of about two hours in a driving simulator. This led to a ranking of all methods, with five emerging clear winners, comprising two existing methods and three new ones. [less ▲]

Detailed reference viewed: 47 (17 ULg)
Full Text
See detailDrowsiness monitoring for road safety
Wertz, Jérôme ULg; François, Clémentine ULg; Verly, Jacques ULg

Conference (2013, December 13)

Detailed reference viewed: 19 (3 ULg)
See detailGeneral Chair and Co-Organizer of (2013) "3D Stereo MEDIA: The International 3D Summit for Science, Technology, Art, and Business". Held in Liège, Belgium, on 3-6 Dec 2013, at Royal Opera House and "Hôtel de Bochholz". 5th edition. J. G. Verly initiated event in 2008.
Verly, Jacques ULg

Book published by Image&3D Europe ASBL (2013)

3D Stereo MEDIA 2013 was held in Liège, Belgium, on 3-6 Dec 2013, and comprised the following sub-events: 3D Workshop in Cannes (Festival de Cannes, American Pavilion, Cannes, France, 21 May 2013 ... [more ▼]

3D Stereo MEDIA 2013 was held in Liège, Belgium, on 3-6 Dec 2013, and comprised the following sub-events: 3D Workshop in Cannes (Festival de Cannes, American Pavilion, Cannes, France, 21 May 2013), Scientific Conference: 2013 International Conference on 3D Imaging (IC3D 2013), 3D Content Financing Market, International 3D Festival, Professional Conference, I3DS-Europe Event, B2B Meetings, Awards Evening. [less ▲]

Detailed reference viewed: 11 (0 ULg)
See detailOrganizer, General Chair, and Editor of 2013 International Conference on 3D Imaging
Verly, Jacques ULg

Book published by Institute of Electrical and Electronics Engineers (IEEE) (2013)

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailA New Validated Method for Improving the Audiovisual Spatial Congruence in the Case of Stereoscopic-3D Video and Wave Field Synthesis
André, Cédric ULg; Corteel, Etienne; Embrechts, Jean-Jacques ULg et al

in 3D Imaging (IC3D), 2013 International Conference on (2013, December)

While 3D cinema is becoming increasingly established, little effort has focused on the general problem of producing a 3D sound scene spatially coherent with the visual content of a stereoscopic-3D (s-3D ... [more ▼]

While 3D cinema is becoming increasingly established, little effort has focused on the general problem of producing a 3D sound scene spatially coherent with the visual content of a stereoscopic-3D (s-3D) movie. The perceptual relevance of such spatial audiovisual coherence is of significant interest. In this paper, we explain why the combination of accurate sound positioning and stereoscopic-3D images can lead to an incongruence between the sound and the image for multiple spectators. Then, we adapt to s-3D viewing a method originally proposed for 2D images in the literature to reduce this error. Finally, a subjective experiment is carried out to prove the efficiency of the method. [less ▲]

Detailed reference viewed: 49 (3 ULg)
Full Text
See detail3D analysis of gait using accelerometer measurements
Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg; Stamatakis, Julien et al

Scientific conference (2013, November 07)

Detailed reference viewed: 95 (22 ULg)
See detailExperiments in Live Capture and Transmission of Stereoscopic 3D Video Images
Grogna, David ULg; Verly, Jacques ULg

in Lucas, Laurent; Loscos, Celine; Remion, Yannick (Eds.) 3D Video: From Capture to Diffusion (2013)

Detailed reference viewed: 15 (2 ULg)
See detailExpériences de direct en 3D stéréoscopique
Grogna, David ULg; Verly, Jacques ULg

in Lucas, Laurent; Loscos, Céline; Remion, Yannick (Eds.) Vidéo 3D : Capture, traitement et diffusion (2013)

Detailed reference viewed: 20 (2 ULg)
Full Text
Peer Reviewed
See detailValidation of an accelerometer-based approach to quantify gait events
Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg; Stamatakis, Julien et al

Poster (2013, June)

Researchers rarely provide solid performance and validation information about their acceleometer-based approaches to human gait analysis. We present here a novel signal processing and analysis algorithm ... [more ▼]

Researchers rarely provide solid performance and validation information about their acceleometer-based approaches to human gait analysis. We present here a novel signal processing and analysis algorithm that automatically extracts four consecutive fundamental events of walking: heel strike (HS), toe strike (TS), heel off (HO), and toe off (TO). In addition, we validate this accelerometer-based technique by comparing these extracted gait events with those obtained by a kinematic 3D analysis system and a force plate, used as gold standards. [less ▲]

Detailed reference viewed: 109 (43 ULg)
See detailD-STAR digital amateur communications in space with OUFTI-1 CubeSat
Pisane, Jonathan ULg; Denis, Amandine ULg; Verly, Jacques ULg

Article for general public (2013)

OUFTI-1 is a nano-satellite currently being constructed by the students of the University of Liège, Belgium. Its main payload is the D-STAR amateur-radio telecommunication protocol. In this paper, we ... [more ▼]

OUFTI-1 is a nano-satellite currently being constructed by the students of the University of Liège, Belgium. Its main payload is the D-STAR amateur-radio telecommunication protocol. In this paper, we explain how hams will be able to operate OUFTI-1 for D-STAR space communications. The large footprint of OUFTI-1 results in a larger number of users being able to communicate via D-STAR. [less ▲]

Detailed reference viewed: 79 (12 ULg)
Full Text
Peer Reviewed
See detailAutomatic target recognition with passive bistatic radars, with applications to the detection of anomalies in the civilian air traffic
Pisane, Jonathan ULg; Azarian, Sylvain; Lesturgie, Marc et al

Conference (2013, April 19)

Detailed reference viewed: 47 (2 ULg)
Full Text
Peer Reviewed
See detailPerformance evaluation of methods for correcting ocular artifacts in electroencephalographic (EEG) recordings
Kirkove, Murielle ULg; François, Clémentine ULg; Libotte, Aurélie et al

Conference (2013, February)

The presence of ocular artifacts (OA) due to eye movements and eye blinks is a major problem for the analysis of electroencephalographic (EEG) recordings in most applications. A large variety of methods ... [more ▼]

The presence of ocular artifacts (OA) due to eye movements and eye blinks is a major problem for the analysis of electroencephalographic (EEG) recordings in most applications. A large variety of methods (algorithms) exist for detecting or/and correcting OA’s. We identified the most promising methods, implemented them, and compared their performance for correctly detecting the presence of OA’s. These methods are based on signal processing “tools” that can be classified into three categories: wavelet transform, adaptive filtering, and blind source separation. We evaluated the methods using EEG signals recorded from three healthy persons subjected to a driving task in a driving simulator. We performed a thorough comparison of the methods in terms of the usual performances measures (sensitivity, specificity, and ROC curves), using our own manual scoring of the recordings as ground truth. Our results show that methods based on adaptive filtering such as LMS and RLS appear to be the best to successfully identify OA’s in EEG recordings. [less ▲]

Detailed reference viewed: 114 (43 ULg)
See detailGeneral Chair and Co-Organizer of (2012) "3D Stereo MEDIA: The European 3D-Stereo Summit for Science, Technology, and Digital Art". Held in Liège, Belgium, on 3-6 Dec 2012, at Crowne Plaza Hotel, Royal Opera House, and "Cinéma Sauvenière". 4th edition. J. G. Verly initiated event in 2008.
Verly, Jacques ULg

Book published by Image&3D Europe ASBL (2012)

3D Stereo MEDIA 2012 was held in Liège, Belgium, on 3-6 Dec 2012, and comprised the following sub-events: Scientific Conference: 2012 International Conference on 3D Imaging (IC3D 2012), 3D Film Mart, 3D ... [more ▼]

3D Stereo MEDIA 2012 was held in Liège, Belgium, on 3-6 Dec 2012, and comprised the following sub-events: Scientific Conference: 2012 International Conference on 3D Imaging (IC3D 2012), 3D Film Mart, 3D Film Festival, Professional Conference, Workshop "Optics&3D" Workshop "3D Industrial Vision" 3D Academy, B2B Meetings, Awards Evening. [less ▲]

Detailed reference viewed: 8 (0 ULg)
See detailOrganizer, General Chair, and Editor of 2012 International Conference on 3D Imaging
Verly, Jacques ULg

Book published by Institute of Electrical and Electronics Engineers (IEEE) (2012)

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailValidated Extraction of Gait Events from 3D Accelerometer Recordings
Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg; Stamatakis, Julien et al

in IEEE International Conference on 3D Imaging (IC3D) (2012, December)

This work is part of a project that deals with the three-dimensional (3D) analysis of normal and pathological gaits based on a newly developed system for clinical applications, using low-cost wireless ... [more ▼]

This work is part of a project that deals with the three-dimensional (3D) analysis of normal and pathological gaits based on a newly developed system for clinical applications, using low-cost wireless accelerometers and a signal processing algorithm. This system automatically extracts relevant gait events such as the heel strikes (HS) and the toe-offs (TO), which characterize the stance and the swing phases of walking. The performances of the low-cost accelerometer hardware and related algorithm have been compared to those obtained by a kinematic 3D analysis system and a force plate, used as gold standard methods. The HS and TO times obtained from the gait data of 7 healthy volunteers (147 trials) have been found to be (mean ± standard deviation) 0.42±7.92 ms and 3.11±10.08 ms later than those determined by the force plate, respectively. The experimental results demonstrate that the new hardware and associated algorithm constitute an effective low-cost gait analysis system, which could thus be used for the assessment of mobility in routine clinical practice. [less ▲]

Detailed reference viewed: 150 (55 ULg)