Linear Estimation of 4-D Illumination Light Field from Diffuse Reflections

This paper proposes a linear estimation method for 4-D illumination light field using an inverse lighting framework. Although lighting environments have conventionally been modeled by the combination of point light sources or a spherical light field map, complex light sources such as an ordinary fla...

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Veröffentlicht in:Proceedings - IEEE Computer Society Conference on Pattern Recognition and Image Processing S. 496 - 500
Hauptverfasser: Aoto, Takahito, Sato, Tomokazu, Mukaigawa, Yasuhiro, Yokoya, Naokazu
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: IEEE 01.01.2013
Schlagworte:
Cameras
Estimation
Harmonic analysis
Lenses
Light sources
Lighting
Linear systems
ISSN:0730-6512
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Abstract This paper proposes a linear estimation method for 4-D illumination light field using an inverse lighting framework. Although lighting environments have conventionally been modeled by the combination of point light sources or a spherical light field map, complex light sources such as an ordinary flashlight with lenses and reflectors, can not be correctly modeled by these approaches. In order to correctly model these complex light sources, we employ 4-D illumination light field. Unlike conventional work, we decompose observed intensities on a diffuse-reflection board into intensities of 4-D light rays by solving a linear system. We validate the effectiveness of the proposed method through the experiments on real and virtual environments.
AbstractList This paper proposes a linear estimation method for 4-D illumination light field using an inverse lighting framework. Although lighting environments have conventionally been modeled by the combination of point light sources or a spherical light field map, complex light sources such as an ordinary flashlight with lenses and reflectors, can not be correctly modeled by these approaches. In order to correctly model these complex light sources, we employ 4-D illumination light field. Unlike conventional work, we decompose observed intensities on a diffuse-reflection board into intensities of 4-D light rays by solving a linear system. We validate the effectiveness of the proposed method through the experiments on real and virtual environments.
Author Sato, Tomokazu
Yokoya, Naokazu
Mukaigawa, Yasuhiro
Aoto, Takahito
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  givenname: Takahito
  surname: Aoto
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  givenname: Tomokazu
  surname: Sato
  fullname: Sato, Tomokazu
  email: tomoka-s@is.naist.jp
  organization: Nara Inst. of Sci. & Technol., Nara, Japan
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  givenname: Yasuhiro
  surname: Mukaigawa
  fullname: Mukaigawa, Yasuhiro
  email: mukaigaw@am.sanken.osaka-u.ac.jp
  organization: ISIR, Osaka Univ., Ibaraki, Japan
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  givenname: Naokazu
  surname: Yokoya
  fullname: Yokoya, Naokazu
  email: yokoya@is.naist.jp
  organization: Nara Inst. of Sci. & Technol., Nara, Japan
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Snippet This paper proposes a linear estimation method for 4-D illumination light field using an inverse lighting framework. Although lighting environments have...
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StartPage 496
SubjectTerms Cameras
Estimation
Harmonic analysis
Lenses
Light sources
Lighting
Linear systems
Title Linear Estimation of 4-D Illumination Light Field from Diffuse Reflections
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