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            <title xml:lang="en">Perceptual quality assessment : subjective and objective studies</title>
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            <idno type="halRefHtml">Traitement du signal et de l'image [eess.SP]. Université de Grenoble, 2014. Français. &lt;a target="_blank" href="https://www.theses.fr/2014GRENT051"&gt;&amp;#x27E8;NNT : 2014GRENT051&amp;#x27E9;&lt;/a&gt;</idno>
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                <term xml:lang="en">Subjective experiments</term>
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                <term xml:lang="en">Perceptual quality</term>
                <term xml:lang="fr">Qualité perceptuelle</term>
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              <p>3D mesh animations have been increasingly used in various applications, e.g., in digital entertainment, computer-aided design and medical imaging. It is possible that a mesh model undergoes some lossy operations, e.g., compression, watermarking or simplification, which can impair the original mesh surface and introduce geometric distortions. An important task is to quantify such distortions and assess the perceptual quality of impaired meshes. In this manuscript, we focus on the perceptual quality assessment of 3D static and dynamic meshes. We present psychometric experiments that we conducted to measure the subjective perceptual quality of dynamic meshes. We also present new full-reference and reduced-reference objective metrics capable of faithfully evaluating the perceptual quality of 3D static and dynamic meshes.</p>
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              <p>Les maillages 3D polygonaux sont largement utilisés dans diverses applications telles que le divertissement numérique, la conception assistée par ordinateur et l'imagerie médicale. Un maillage peut être soumis à différents types d'opérations comme la compression, le tatouage ou la simplification qui introduisent des distorsions géométriques (modifications) à la version originale. Il est important de quantifier ces modification introduites au maillage d'origine et d'évaluer la qualité perceptuelle des maillages dégradés. Dans ce cadre, on s'intéresse dans cette thèse à l'évaluation de la qualité perceptuelle des maillages 3D statiques et dynamiques. On présente des études expérimentales pour l'évaluation subjective de la qualité des maillages 3D dynamiques.On présente également de nouvelles métriques objectives, de type avec-référence complète ou de type avec référence-réduite, qui sont efficaces pour l'estimation de la qualité perçue des maillages statiques et dynamiques.</p>
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