2 February 2011 A comparison of perceived lighting characteristics in simulations versus real-life setup
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In the design of professional luminaires, improving visibility has always been a core target. Recently, it has become clearer that especially for consumer lighting, generating an appropriate atmosphere and pleasant feeling is of almost equal importance. In recent studies it has been shown that the perception of an atmosphere can be described by four variables: cosiness, liveliness, tenseness, and detachment. In this paper we compare the perception of these lighting characteristics when viewed in reality with the perception when viewing a simulated picture. Replacing reality by a picture on a computer screen such as an LCD monitor, or a piece of paper, introduces several differences. These include a reduced dynamic range, reduced maximum brightness and quantization noise in the brightness levels, but also in a different viewing angle, and a different adaption of the human visual system. Research has been done before to compare simulations with photographs, and simulations with reality. These studies have focused on 'physical variables', such as brightness and sharpness, but also on naturalness and realism. We focus on the accuracy of a simulation for the prediction of the actual goal of a lot of luminaires: atmosphere creation. We investigate the correlation between perceptual characteristics of the atmosphere of a real-world scene and a simulated image of it. The results show that for all 4 tested atmosphere words similar main effects and similar trends (over color temperature, fixtures, intensities) can be found in both the real life experiments and the simulation experiments. This implies that it is possible to use simulations on a screen or printout for the evaluation of atmosphere characteristics.
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B. Salters, B. Salters, P. Seuntiens, P. Seuntiens, "A comparison of perceived lighting characteristics in simulations versus real-life setup", Proc. SPIE 7865, Human Vision and Electronic Imaging XVI, 786506 (2 February 2011); doi: 10.1117/12.876363; https://doi.org/10.1117/12.876363

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