L’équipe ARMEDIA organise un séminaire ouvert aux non-spécialistes ce jeudi 14 juin 2018, à 14h en salle A003 de TSP.
Le sujet abordé et présenté par Rania Bensaied, doctorante en 3è année sous la direction de Mihai Mitrea, porte sur :

Subjective quality assessment: a study on the grading scales. Illustrations for stereoscopic and 2D video content

Le résumé de l’exposé est présenté ci-dessous.

Quality evaluation is an ever-fascinating field, covering at least a century of research works emerging from psychology, psychophysics, sociology, marketing, medicine, … While for visual quality evaluation, the ITU Recommendations pave the way towards well-configured, consensual evaluation conditions granting reproducibility and comparability of the experimental results, an in-depth analysis of the state-of-the-art studies shows at least three open challenges, related to the: (1) the continuous vs. discrete evaluation scales, (2) the statistical distribution of the scores assigned by the observers and (3) the usage of semantic labels on the grading scales.

Thus, we shall present theoretical and methodological results related to:

1. bridging at the theoretical level the continuous and the discrete scale evaluation procedures and investigating whether the number of the classes on the discrete scales is a criterion meaningful in the results interpretations or just a parameter;

2. quantifying the bias induced in subjective video quality experiments by the semantic labels (e.g. Excellent, Good, Fair, Poor, and Bad) generally associated to the discrete grading scales;

3. designing and deploying and experimental test-bed able to support their precision and statistical relevance of the results.