Interaction improves judgements of surface reflectance properties M Scheller Lichtenauer1, P Schuetz2, P Zolliker1 |
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1Media Technology Lab, EMPA, Switzerland |
| Rendering materials on displays becomes ubiquitous in industrial design, architecture and visualisation. Previous studies measured the influence of disparity, motion and colour on the perception of gloss in renderings [Nishida et Shinya, 1998, Jour. Opt. Soc. Am. A, 12 2951--2965] [Wendt et al., 2010, Journal of Vision 10(9):7 1--17] . Observers passively experienced motion in those studies, while users can interactively move the rendered surfaces in most design applications. We investigate, whether observers actively exploring rendered stimuli judge their surface reflectance properties differently than observers passively watching renderings. In the present study, we compare judgements of rough surfaces differing in gloss by interacting and passive observers. Various renderings of a surface geometry digitized with a 3D laser scanner had to be attributed to the most similar of real samples. We found that inter-observer reliability was significantly higher for interacting observers. The claim is supported by several indices of inter-observer reliability. Our results also shed light on the open questions of [Wendt et al., op. cit.] with regard to motion. The perpetuity of motion in their experiments could negatively impact observer performance. |
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