Yoshinori Akao, Norimichi Tsumura, Toshiya Nakaguchi and Yoichi Miyake
Journal of Imaging Science and Technology, Vol.54, No.6, pp.060503-(11), Nov. 2010
Abstract
We characterize sheets of white paper using three bidirectional reflectance
distribution function (BRDF) model parameters estimated from the BRDF in
the specular reflection plane. The radiance factors of eight types of paper
sheets having a wide range of material characteristics were measured for
284 geometries in the specular reflection plane. They were approximated
within an average error of 4.5% using a linear combination of Torrance-Sparrow
and Lambertfs BRDF models. The proposed model well approximated the BRDF
of samples in the specular plane. Based on the estimated BRDF model parameters,
the eight measured paper sheets could be broadly classified into glossy
papers and rough papers. The two glossy papers were distinguishable from
each other, while the six rough papers could be classified into three groups
using the BRDF model parameters. The proposed method is considered to be
effective for characterizing a wide range of white paper ranging from glossy
to matte paper.
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