Kaori Baba
Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan
Shinichi Inoue
Process Development Laboratories, Mitsubishi Paper Mills Limited, 3 Maeyamanishi, Nishigomura, Nishishirakawa-gun,
Fukushima 961-8054, Japan
Rui Takano and Norimichi Tsumura
Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan
Journal of Imaging Science and Technology 58(3): 030501-1030501-6(2014).
Abstract
In this article, the authors reproduce gloss unevenness on a paper surface
by expanding the Torrance–Sparrow model, which is based on the measurement
and analysis of mesoscopic facets on paper. As the conventional Torrance–Sparrow
model only considers macroscopic and microscopic facets, the authors expand
the model to be able to consider mesoscopic facets. The normal vectors
of mesoscopic facets on a paper surface were measured by using a collimator
lens system with a small pinhole aperture, and the authors obtained the
normal vector map by moving the stage for the paper. Gloss unevenness was
reproduced by generating the same probability distribution as the measured
distribution of the normal vectors. As a result, the authors succeeded
in reproducing gloss unevenness using an expanded Torrance–Sparrow model..
[Reprint]