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Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments

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Illusory gloss on Lambertian surfaces.

Maarten W A Wijntjes¹, Sylvia C Pont

¹Perceptual Intelligence Laboratory, Faculty of Industrial Design Engineering, Delft University of Technology, The Netherlands. m.w.a.wijntjes@tudelft.nl

Journal of Vision

|November 26, 2010

Summary

This summary is machine-generated.

Gloss perception increases with surface relief height, potentially linked to luminance histogram skewness. However, experimental results suggest a more complex relationship, possibly involving bas-relief ambiguity.

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Area of Science:

Computer Vision
Perception Psychology

Background:

Surface relief height correlates with perceived gloss.
Glossiness perception may relate to luminance histogram skewness.

Purpose of the Study:

Investigate the link between surface relief and gloss perception.
Test if luminance histogram skewness explains this relationship.
Explore the role of bas-relief ambiguity in illusory gloss.

Main Methods:

Derived a general relation between surface depth, illumination, and image intensity.
Numerically simulated relief stretch and skewness.
Experimentally tested changes in depth range and illumination direction.

Main Results:

Confirmed a strong illusory gloss effect on stretched Lambertian surfaces.
Found that skewness alone did not fully explain the results.
Identified that bas-relief ambiguity qualitatively predicts illusory highlights.

Conclusions:

The relationship between surface relief and gloss is complex.
Skewness is a factor, but not the sole explanation for perceived gloss.
Bas-relief ambiguity offers a better qualitative model for illusory highlights.