Estimation of spectral distribution of sky radiance using a commercial digital camera
Estimation of spectral distribution of sky radiance using a commercial digital camera
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DOI：
10.1364/ao.55.000415
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发表时间：
2016-01-10
期刊：
影响因子：
1.9
通讯作者：
Murata, Isao
中科院分区：
文献类型：
--
作者：
Saito, Masanori;Iwabuchi, Hironobu;Murata, Isao
提出了根据数码相机捕获的图像估计天空辐射光谱分布以及准确估计相机的光谱响应的方法。天空辐射率的光谱分布表示为波长的多项式，其系数通过线性变换从数字 RGB 计数中获得。测量的辐射亮度光谱分布与光谱仪和辐射传输模拟在430-680 nm波长范围内得到的光谱分布一致，标准偏差低于1%。初步应用表明该方法可用于检测云和研究地面辐照度与云分布之间的关系。 (C) 2016年美国光学学会
Methods for estimating spectral distribution of sky radiance from images captured by a digital camera and for accurately estimating spectral responses of the camera are proposed. Spectral distribution of sky radiance is represented as a polynomial of the wavelength, with coefficients obtained from digital RGB counts by linear transformation. The spectral distribution of radiance as measured is consistent with that obtained by spectrometer and radiative transfer simulation for wavelengths of 430-680 nm, with standard deviation below 1%. Preliminary applications suggest this method is useful for detecting clouds and studying the relation between irradiance at the ground and cloud distribution. (C) 2016 Optical Society of America