Evaluation of a multispectral image acquisition system aimed at reconstruction of spectral reflectances
Evaluation of a multispectral image acquisition system aimed at reconstruction of spectral reflectances
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DOI：
10.1117/1.2087567
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发表时间：
2005-10
影响因子：
1.3
通讯作者：
N. Shimano
中科院分区：
文献类型：
--
作者：
N. Shimano
被成像物体的光谱反射率的重建对于在各种观察光源下再现颜色是重要的。在这项工作中，推导出一个简单的公式来评估一组彩色图像传感器的质量，旨在重建光谱反射率，它被应用到多光谱图像采集系统。由于质量不仅取决于光谱的灵敏度，但也存在于系统中的噪声，这是不可能的，以评估一组传感器没有先验知识的噪声存在于它。因此，噪声方差的多光谱相机估计的一个新的建议，它是第一次应用到评估。结果表明，实验结果与评估模型的预测吻合良好，估计噪声方差的方法是有用的评估。
The reconstruction of spectral reflectances of objects being imaged is important in reproducing a color under a variety of viewing illuminants. In this work, a simple formula is derived to evaluate the quality of a set of color image sensors aimed at reconstruction of spectral reflectances, and it is applied to multispectral image acquisition systems. Since the quality depends not only on the spectral sensitivities but also on the noise present in the systems, it is impossible to evaluate a set of sensors without prior knowledge of the noise present in it. Therefore, the noise variance of the multispectral cameras is estimated by a new proposal, and it is applied to the evaluation for the first time. It is shown that the experimental results agree well with the predictions by the evaluation model, and that the method to estimate the noise variance is useful for the evaluation.