The sparkle impression is an important factor of appearance quality. The impression is generated by reflection from a material surface that contains metallic or pearl pigments. Although several methods of evaluating the impression have been proposed, there is insufficient correlation
between the results of these methods and subjective evaluation because the impression depends on the observation distance. The present study developed a method of evaluating the sparkle impression considering the observation distance. To this end, a subjective evaluation experiment was performed
for different observation distances and a measurement system comprising a spectral camera and lighting device was constructed. The evaluation model was proposed on the basis of the spatial frequency characteristics of the recorded image and human visual characteristics. The contribution ratio
between subjective evaluation scores and evaluation values was high.
Journal Title : Electronic Imaging
Publisher Name : Society for Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151 USA
Shuhei Watanabe, Takuroh Sone, "Evaluation of Sparkle Impression Considering Observation Distance" in Proc. IS&T Int’l. Symp. on Electronic Imaging: Material Appearance,2019,pp 476-1 - 476-5, https://doi.org/10.2352/ISSN.2470-1173.2019.6.MAAP-476
Evaluation of Sparkle Impression Considering Observation Distance
WatanabeShuhei
SoneTakuroh
13012019
2019
6
476-1
476-5
2019
The sparkle impression is an important factor of appearance quality. The impression is generated by reflection from a material surface that contains metallic or pearl pigments. Although several methods of evaluating the impression have been proposed, there is insufficient correlation
between the results of these methods and subjective evaluation because the impression depends on the observation distance. The present study developed a method of evaluating the sparkle impression considering the observation distance. To this end, a subjective evaluation experiment was performed
for different observation distances and a measurement system comprising a spectral camera and lighting device was constructed. The evaluation model was proposed on the basis of the spatial frequency characteristics of the recorded image and human visual characteristics. The contribution ratio
between subjective evaluation scores and evaluation values was high.
Appearancesparkle impressionobservation distancevisual transfer function