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Volume: 31 | Article ID: art00005
Evaluation of Sparkle Impression Considering Observation Distance
  DOI :  10.2352/ISSN.2470-1173.2019.6.MAAP-476  Published OnlineJanuary 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.

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Shuhei Watanabe, Takuroh Sone, "Evaluation of Sparkle Impression Considering Observation Distancein Proc. IS&T Int’l. Symp. on Electronic Imaging: Material Appearance,  2019,  pp 476-1 - 476-5,

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