2023 年 7 巻 2 号 p. 2_67-2_74
In this study, to clarify factors related to impression evaluation of decorative films, we focused on spectral radiance ratio characteristics and attempted to clarify the relationship between these characteristics and impression evaluation. As a result, two characteristics: the "wavelength-dependent type", in which the spectral radiance ratio characteristic varies significantly with the magnitude of the wavelength, and the "angle-dependent type", in which it varies significantly with the angle of measurement, are each related to impression evaluation, such as depth perception. The former feature can be expressed as the difference between the maximum and minimum values of the spectral radiance ratio at highlights and was found to be related to saturation. On the other hand, the latter feature can be expressed by the difference between the maximum values of the spectral radiance ratios for semi-shades and shades, and was shown to be related to the difference in their luminance. Thus, the impression of the decorative film can be expressed by the spectral radiance ratio.
