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  • ESTIMATION OF THE SPECTRAL RADIANCE OF A SKY ELEMENT USING PRINCIPAL COMPONENT ANALYSIS  [in Japanese]

    YATSUZUKA Hideki , UETANI Yoshiaki

    … In the previous paper<sup>7)</sup>, we have developed a method of measuring the spectral radiance of all sky elements using a general purpose digital camera and a circular fisheye lens. …

    Journal of Environmental Engineering (Transactions of AIJ) 79(697), 227-232, 2014

    J-STAGE 

  • MEASUREMENT OF THE ALL SKY SPECTRAL RADIANCE DISTRIBUTION USING A DIGITAL CAMERA WITH A FISHEYE LENS  [in Japanese]

    YATSUZUKA Hideki , UETANI Yoshiaki

    … 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 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. …

    Journal of Environmental Engineering (Transactions of AIJ) 78(690), 623-629, 2013

    J-STAGE 

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