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Updated: Apr 27, 2026

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Light-induced Patterning and Grafting for Slippery Surfaces based on Silane-coated Nanoporous Structures
Published on: November 14, 2025
600
Why do rough surfaces appear glossy?
Summary
Gloss perception on rough surfaces is complex. Increasing roughness initially boosts perceived gloss, but beyond a point, it decreases it, contrary to previous findings. Highlight area is a key predictor.
Area of Science:
- Visual perception
- Computer graphics
- Material science
Background:
- Most gloss perception research uses smooth surfaces like spheres.
- Prior studies suggested increased mesoscale roughness enhances gloss on complex surfaces.
Purpose of the Study:
- Investigate gloss perception on complex surfaces under realistic rendering conditions.
- Determine the relationship between mesoscale roughness and perceived gloss.
- Identify image statistics predicting glossiness.
Main Methods:
- Utilized realistic rendering conditions for stimuli.
- Examined five image statistics of estimated highlights.
- Developed a model for the roughness-highlight area relationship.
Main Results:
- Perceived gloss initially increases with roughness but then decreases.
- "Percentage of highlight area" strongly correlates with perceived gloss.
- A model explains the non-monotonic relationship between roughness and highlight area.
Conclusions:
- Realistic rendering is crucial for accurate gloss perception studies.
- The effect of roughness on gloss is non-monotonic.
- Highlight area is a significant factor in predicting perceived gloss.
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