Darrodi Maryam Mohammadzadeh, Finlayson Graham, Goodman Teresa, Mackiewicz Michal
J Opt Soc Am A Opt Image Sci Vis. 2015 Mar 1;32(3):381-91. doi: 10.1364/JOSAA.32.000381.
In this article, we describe a spectral sensitivity measurement procedure at the National Physical Laboratory, London, with the aim of obtaining ground truth spectral sensitivity functions for Nikon D5100 and Sigma SD1 Merill cameras. The novelty of our data is that the potential measurement errors are estimated at each wavelength. We determine how well the measured spectral sensitivity functions represent the actual camera sensitivity functions (as a function of wavelength). The second contribution of this paper is to test the performance of various leading sensor estimation techniques implemented from the literature using measured and synthetic data and also evaluate them based on ground truth data for the two cameras. We conclude that the estimation techniques tested are not sufficiently accurate when compared with our measured ground truth data and that there remains significant scope to improve estimation algorithms for spectral estimation. To help in this endeavor, we will make all our data available online for the community.
在本文中，我们描述了伦敦国家物理实验室的一种光谱灵敏度测量程序，目的是获取尼康D5100和适马SD1 Merrill相机的地面真值光谱灵敏度函数。我们数据的新颖之处在于，在每个波长处都估计了潜在的测量误差。我们确定测量的光谱灵敏度函数在多大程度上代表了实际相机的灵敏度函数（作为波长的函数）。本文的第二个贡献是使用测量数据和合成数据测试文献中实现的各种领先传感器估计技术的性能，并根据这两款相机的地面真值数据对它们进行评估。我们得出结论，与我们测量的地面真值数据相比，所测试的估计技术不够准确，并且在改进光谱估计的估计算法方面仍有很大空间。为了推动这项工作，我们将把所有数据在线提供给社区。
