September 2021
Volume 21, Issue 9
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2021
Effects of inter-reflections in box spaces on perceived object color harmony and shape
Author Affiliations & Notes
  • Cehao Yu
    Perceptual Intelligence Lab (π–Lab), Delft University of Technology
  • Elmar Eisemann
    Computer Graphics and Visualization Group, Delft University of Technology
  • Maarten W.A. Wijntjes
    Perceptual Intelligence Lab (π–Lab), Delft University of Technology
  • Jan Jaap R. van Assen
    Perceptual Intelligence Lab (π–Lab), Delft University of Technology
  • Sylvia C. Pont
    Perceptual Intelligence Lab (π–Lab), Delft University of Technology
  • Footnotes
    Acknowledgements  This work was supported by the Marie Skłodowska-Curie Action – Innovative Training Network (MSCA-ITN-ETN) DyViTo: “Dynamics in Vision and Touch – the look and feel of stuff” under the European Union’s Horizon 2020 research and innovation program [grant number 765121, 2017]
Journal of Vision September 2021, Vol.21, 1992. doi:
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      Cehao Yu, Elmar Eisemann, Maarten W.A. Wijntjes, Jan Jaap R. van Assen, Sylvia C. Pont; Effects of inter-reflections in box spaces on perceived object color harmony and shape. Journal of Vision 2021;21(9):1992.

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      © ARVO (1962-2015); The Authors (2016-present)

  • Supplements

The effective illumination incident on an object in a three-dimensional scene is a geometrically-weighted sum of direct and indirect light. The luminous and chromatic properties of the light field vary spatially and directionally, inducing luminance and chromatic gradients - smooth color variations over objects. When a color combination of a step or gradient produces a pleasing effect, it is said to be harmonious. Previous studies have shown that perception of color harmony is dependent on a complex interplay between hue, chroma and lightness (Ou and Luo, 2006). Further, the visual cues from luminance and chromatic gradients might assist three-dimensional shape recovery (Ruppertsberg et al., 2008). The aim of this research is to investigate the influence of chromatic furnishing materials on the perception of object color harmony and shape, through inter-reflections. Box spaces were rendered with uni-chromatic surfaces and a colored sphere, acting as a probe, in its center, illuminated by a planar white illuminant. 24 room surface colors were sampled systematically in RGB space. The sphere’s color was sampled from the 15 CIE CRI color checker samples. Participants had to rate perceived three-dimensionality (flat disk vs. sphere) and color harmony (disharmonious vs. harmonious) of the rendered sphere under carefully calibrated conditions. Before each session and between trials, participants adapted to an animated noisy mask. A short training session introduced randomly selected stimuli after which the main experiment took place. Of the tested furnishing hues, the bluish rooms resulted in the highest mean color harmony and three-dimensionality scores. Decreasing the furnishing brightness resulted in a major three-dimensionality enhancement, as expected. Reducing the saturation and even more so the brightness of the chromatic furnishing colors enhanced the perceived color harmony of the probe. These effects show the importance of 3D versions of color checkers, here we used spheres, for color testing.


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