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Article Dans Une Revue IEEE Transactions on Visualization and Computer Graphics Année : 2016

Just Noticeable Distortion Profile for Flat-Shaded 3D Mesh Surfaces

Résumé

It is common that a 3D mesh undergoes some lossy operations (e.g., compression, watermarking and transmission through noisy channels), which can introduce geometric distortions as a change in vertex position. In most cases the end users of 3D meshes are human beings; therefore, it is important to evaluate the visibility of introduced vertex displacement. In this paper we present a model for computing a Just Noticeable Distortion (JND) profile for flat-shaded 3D meshes. The proposed model is based on an experimental study of the properties of the human visual system while observing a flat-shaded 3D mesh surface, in particular the contrast sensitivity function and contrast masking. We first define appropriate local perceptual properties on 3D meshes. We then detail the results of a series of psychophysical experiments where we have measured the threshold needed for a human observer to detect the change in vertex position. These results allow us to compute the JND profile for flat-shaded 3D meshes. The proposed JND model has been evaluated via a subjective experiment, and applied to guide 3D mesh simplification as well as to determine the optimal vertex coordinates quantization level for a 3D model.
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Dates et versions

hal-01242271 , version 1 (19-05-2016)

Identifiants

Citer

Georges Nader, Kai Wang, Franck Hétroy-Wheeler, Florent Dupont. Just Noticeable Distortion Profile for Flat-Shaded 3D Mesh Surfaces. IEEE Transactions on Visualization and Computer Graphics, 2016, 22 (11), pp.2423-2436. ⟨10.1109/TVCG.2015.2507578⟩. ⟨hal-01242271⟩
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