DigitalAngewandte InformatikZeitschriftenartikel
M. Urvoy, Marcus Barkowsky, P. Le Callet
How visual fatigue and discomfort impact 3D-TV quality of experience: a comprehensive review of technological, psychophysical, and psychological factors
Annales des Télécommunications, vol. 68, no. 11-12, pp. 641-655
2013
DOI: 10.1007/s12243-013-0394-3
Abstract anzeigen
The quality of experience (QoE) of 3D contents is usually considered to be the combination of the perceived visual quality, the perceived depth quality, and lastly the visual fatigue and comfort. When either fatigue or discomfort are induced, studies tend to show that observers prefer to experience a 2D version of the contents. For this reason, providing a comfortable experience is a prerequisite for observers to actually consider the depth effect as a visualization improvement. In this paper, we propose a comprehensive review on visual fatigue and discomfort induced by the visualization of 3D stereoscopic contents, in the light of physiological and psychological processes enabling depth perception. First, we review the multitude of manifestations of visual fatigue and discomfort (near triad disorders, symptoms for discomfort), as well as means for detection and evaluation. We then discuss how, in 3D displays, ocular and cognitive conflicts with real world experience may cause fatigue and discomfort; these includes the accommodation-vergence conflict, the inadequacy between presented stimuli and observers depth of focus, and the cognitive integration of conflicting depth cues. We also discuss some limits for stereopsis that constrain our ability to perceive depth, and in particular the perception of planar and in-depth motion, the limited fusion range, and various stereopsis disorders. Finally, this paper discusses how the different aspects of fatigue and discomfort apply to 3D technologies and contents. We notably highlight the need for respecting a comfort zone and avoiding camera and rendering artifacts. We also discuss the influence of visual attention, exposure duration, and training. Conclusions provide guidance for best practices and future research.
DigitalAngewandte InformatikBeitrag (Sammelband oder Tagungsband)
K. Wang, K. Brunnström, Marcus Barkowsky, M. Urvoy, M. Sjöström, P. Le Callet, S. Tourancheau, B. Andrén
Stereoscopic 3D video coding quality evaluation with 2D objective metrics
Proceedings of SPIE Vol. 8648: Stereoscopic Displays and Applications XXIV
2013
Abstract anzeigen
The 3D video quality is of highest importance for the adoption of a new technology from a user’s point of view. In this paper we evaluated the impact of coding artefacts on stereoscopic 3D video quality by making use of several existing full reference 2D objective metrics. We analyzed the performance of objective metrics by comparing to the results of subjective experiment. The results show that pixel based Visual Information Fidelity metrics fits subjective data the best. The 2D stereoscopic video quality seems to have dominant impact on the coding artefacts impaired stereoscopic videos.
DigitalAngewandte InformatikBeitrag (Sammelband oder Tagungsband)
Marcus Barkowsky, N. Staelens, L. Janowski, Y. Koudota, M. Leszczuk, M. Urvoy, P. Hummelbrunner, I. Sedano, K. Brunnström
Subjective experiment dataset for joint development of hybrid video quality measurement algorithms
QoEMCS 2012 ‐ Third Workshop on Quality of Experience for Multimedia Content Sharing, Berlin
2012
Abstract anzeigen
The application area of an objective measurement algorithm for video quality is always limited by the scope of the video datasets that were used during its development and training. This is particularly true for measurements which rely solely on information available at the decoder side, for example hybrid models that analyze the bitstream and the decoded video. This paper proposes a framework which enables researchers to train, test and validate their algorithms on a large database of video sequences in such a way that the ‐ often limited ‐ scope of their development can be taken into consideration. A freely available video database for the development of hybrid models is described containing the network bitstreams, parsed information from these bitstreams for easy access, the decoded video sequences, and subjectively evaluated quality scores.
DigitalAngewandte InformatikBeitrag (Sammelband oder Tagungsband)
M. Urvoy, Marcus Barkowsky, J. Gutiérrez, R. Cousseau, Y. Koudota, V. Ricordel, P. Le Callet, N. García
NAMA3DS1-COSPAD1: Subjective video quality assessment database on coding conditions introducing freely available high quality 3D stereoscopic sequences
2012 Fourth International Workshop on Quality of Multimedia Experience
2012
Abstract anzeigen
Research in stereoscopic 3D coding, transmission and subjective assessment methodology depends largely on the availability of source content that can be used in cross-lab evaluations. While several studies have already been presented using proprietary content, comparisons between the studies are difficult since discrepant contents are used. Therefore in this paper, a freely available dataset of high quality Full-HD stereoscopic sequences shot with a semiprofessional 3D camera is introduced in detail. The content was designed to be suited for usage in a wide variety of applications, including high quality studies. A set of depth maps was calculated from the stereoscopic pair. As an application example, a subjective assessment has been performed using coding and spatial degradations. The Absolute Category Rating with Hidden Reference method was used. The observers were instructed to vote on video quality only. Results of this experiment are also freely available and will be presented in this paper as a first step towards objective video quality measurement for 3DTV.
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