Effects of image size and interactivity in lighting visualization

Abstract

Rendered images of varied lighting conditions in a virtual environment have been shown to provide a perceptually accurate visual impression of those in a real environment, providing a valuable tool set for the development and communication of new lighting solutions. In order to further improve this tool set, an experiment was conducted to assess the impact of image size and viewing interactivity on perceptual accuracy. It was found that a high-quality TVsized display outperforms a smaller laptop screen and a larger projected image on most measures, and that the expected value of the interactive panoramic format was masked by the fatigue of using it repeatedly.

Validity of simulations for lighting and brand image evaluation

“…The results show a general similarity to a related study, which detected an overall high level of accuracy between the visualizations on a laptop, TV and a projector in relation to the real room. 29 However, the present experiment with the monitor and projector discovered a consistency for brightness in relation to the other study where brightness appeared to be less accurate in comparison to the other measurements of that study. 29 These findings offer designers and researchers a foundation to consider lighting simulations as a valid instrument in their design process or for analytical studies, when images are presented on monitors or with large-size video projections and are analysed for the above-mentioned lighting and brand factors.…”

“…29 However, the present experiment with the monitor and projector discovered a consistency for brightness in relation to the other study where brightness appeared to be less accurate in comparison to the other measurements of that study. 29 These findings offer designers and researchers a foundation to consider lighting simulations as a valid instrument in their design process or for analytical studies, when images are presented on monitors or with large-size video projections and are analysed for the above-mentioned lighting and brand factors. The image techniques enable an attractive and quick procedure for multiple lighting scenes when costly studies in terms of time and money in a real environment are too complex.…”

Towards perceptual accuracy in 3D visualizations of illuminated indoor environments

“…Some parts of this corpus have been presented previously [10][11][12][13]. The present paper brings this whole set of experiments together with new insights and includes a meta-analysis of the importance of all 3D visualization pipeline variables studied.…”

“…In a later experiment (Experiment 6 in Table 2) exploring image size, a small-screen HP 8460p laptop with 14-inch 1366×768 LCD with peak white of 217 cd/m 2 (Laptop) and a large 138-inch diagonal projection from a Sanyo PLC-ZM5000L 3-LCD projector with 1920×1200 pixels and a peak white of 180 cd/m 2 (Proj) were used. Further detail on this experiment can be found in [12].…”

“…Our Pano presentation takes advantage of the quality of offline rendering but still gives the observer some freedom to look around. Details of the experiment with FOV and interactive panorama viewing are described in [12].…”