Improvement of color reproduction in color digital holography by using spectral estimation technique.
Improvement of color reproduction in color digital holography by using spectral estimation technique.
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DOI：
10.1364/ao.50.00h177
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发表时间：
2011-12
期刊：
影响因子：
1.9
通讯作者：
P. Xia;Y. Shimozato;Yasunori Ito;T. Tahara;T. Kakue;Y. Awatsuji;K. Nishio;S. Ura;T. Kubota;O. Matoba
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文献类型：
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作者：
P. Xia;Y. Shimozato;Yasunori Ito;T. Tahara;T. Kakue;Y. Awatsuji;K. Nishio;S. Ura;T. Kubota;O. Matoba
提出了一种利用光谱估计技术来提高物体颜色再现性的彩色数字全息术。在传统的彩色数字全息术中，全息图中的光谱信息不足，并且再现图像的颜色仅取决于全息图记录中使用的三个离散波长处的反射率。因此，三个重建图像的颜色合成图像在颜色再现方面不准确。然而，在我们提出的方法中，应用光谱估计技术，这已在多光谱成像中报道。根据光谱估计技术，可以估计出物体的连续光谱，提高了色彩再现性。数值模拟和实验结果表明，该方法的有效性，平均色差分别从35.81和43.60降低到7.88和25.28。
We propose a color digital holography by using spectral estimation technique to improve the color reproduction of objects. In conventional color digital holography, there is insufficient spectral information in holograms, and the color of the reconstructed images depend on only reflectances at three discrete wavelengths used in the recording of holograms. Therefore the color-composite image of the three reconstructed images is not accurate in color reproduction. However, in our proposed method, the spectral estimation technique was applied, which has been reported in multispectral imaging. According to the spectral estimation technique, the continuous spectrum of object can be estimated and the color reproduction is improved. The effectiveness of the proposed method was confirmed by a numerical simulation and an experiment, and, in the results, the average color differences are decreased from 35.81 to 7.88 and from 43.60 to 25.28, respectively.