魚眼レンズ付デジタルカメラによる全天空分光放射輝度分布の測定法 MEASUREMENT OF THE ALL SKY SPECTRAL RADIANCE DISTRIBUTION USING A DIGITAL CAMERA WITH A FISHEYE LENS

この論文にアクセスする

この論文をさがす

著者

    • 八塚 秀樹 YATSUZUKA Hideki
    • 京都大学大学院工学研究科建築学専攻 修士課程 Graduate Student, Dept. of Architecture, Graduate School of Eng., Kyoto University
    • 上谷 芳昭 UETANI Yoshiaki
    • 京都大学大学院工学研究科建築学専攻 准教授・工博 Assoc. Prof., Dept. of Architecture, Graduate School of Eng., Kyoto University, Dr. Eng.

抄録

We developed a method of measuring the spectral radiance of all sky elements using a general purpose digital camera and a circular fisheye lens. The accuracy of the fisheye camera is adequate for practical daylight design. The instrument is portable for field measurements. The digital camera with the fisheye lens is colorimetrically calibrated to obtain the calibration functions which transfer the video signal values RGB on a digital color image into the absolute values of CIE 1931 tristimulus values XYZ pixel by pixel. The calibrated fisheye digital camera measures the all sky distribution of the XYZ tristimulus values. The XYZ tristimulus values are transferred into the all sky spectral radiance distribution in two ways: (1) by using the CIE daylight illuminant and (2) by using the eigenvectors obtained by principal component analysis of measured spectral radiances of the sky elements by a spectroradiometer. The accuracy of the all sky spectral radiance distribution is validated by comparison with the spectral radiance measured by the spectroradiometer.

収録刊行物

  • 日本建築学会環境系論文集

    日本建築学会環境系論文集 78(690), 623-629, 2013

    日本建築学会

各種コード

  • NII論文ID(NAID)
    130004937086
  • NII書誌ID(NCID)
    AA11830377
  • 本文言語コード
    JPN
  • ISSN
    1348-0685
  • NDL 記事登録ID
    024828295
  • NDL 請求記号
    Z74-D484
  • データ提供元
    NDL  J-STAGE 
ページトップへ