start-ver=1.4
cd-journal=joma
no-vol=
cd-vols=
no-issue=
article-no=
start-page=66
end-page=71
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1995
dt-pub=19956
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Shape from shading with interreflections under proximal light source - 3D shape reconstruction of unfolded book surface from a scanner image
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=<p>We address the problem to recover the 3D shape of an unfolded book surface from the shading information in a scanner image. From a technical point of view, this shape from shading problem in real world environments is characterized by (1) proximal light source, (2) interreflections, (3) moving light source, (4) specular reflection, and (5) nonuniform albedo distribution. Taking all these factors into account, we first formulate the problem based on an iterative nonlinear optimization scheme. Then we introduce piecewise polynomial models of the 3D shape. Image restoration experiments for a real book surface demonstrated that geometric and photometric distortions are almost completely removed by the proposed method</p>

en-copyright=
kn-copyright=

en-aut-name=WadaToshikazu
en-aut-sei=Wada
en-aut-mei=Toshikazu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=UkidaHiroyuki
en-aut-sei=Ukida
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=MatsuyamaTakashi
en-aut-sei=Matsuyama
en-aut-mei=Takashi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama University

affil-num=2
en-affil=
kn-affil=Okayama University

affil-num=3
en-affil=
kn-affil=Okayama University
en-keyword=albedo
kn-keyword=albedo
en-keyword=image restoration
kn-keyword=image restoration
en-keyword=iterative methods
kn-keyword=iterative methods
en-keyword=light reflection
kn-keyword=light reflection
en-keyword=light sources
kn-keyword=light sources
en-keyword=optimisation
kn-keyword=optimisation
en-keyword=piecewise polynomial techniques
kn-keyword=piecewise polynomial techniques
END