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Spectral Image Processing for Museum Lighting Using CIE LED Illuminants

机译:博物馆照明的光谱图像处理使用CIE LED光源

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摘要

This work presents a spectral color-imaging procedure for the detailed colorimetric study of real artworks under arbitrary illuminants. The results demonstrate this approach to be a powerful tool for art and heritage professionals when deciding which illumination to use in museums, or which conservation or restoration techniques best maintain the color appearance of the original piece under any illuminant. Spectral imaging technology overcomes the limitations of common area-based point-measurement devices such as spectrophotometers, allowing a local study either pixelwise or by selected areas. To our knowledge, this is the first study available that uses the proposed CIE (Commission Internationale de l’Éclairage) light-emitting diode (LED) illuminants in the context of art and heritage science, comparing them with the three main CIE illuminants A, D50, and D65. For this, the corresponding colors under D65 have been calculated using a chromatic adaptation transform analogous to the one in CIECAM02. For the sample studied, the CIE LED illuminants with the lowest average CIEDE2000 color differences from the standard CIE illuminants are LED-V1 for A and LED-V2 for D50 and D65, with 1.23, 1.07, and 1.57 units, respectively. The work studied is a Moorish epigraphic frieze of plasterwork with a tiled skirting from the Nasrid period (12th–15th centuries) exhibited in the Museum of the Alhambra (Granada, Spain).
机译:该工作提出了一种可任意光源下真实作品的详细色谱研究的光谱颜色成像程序。结果表明,这种方法是在决定在博物馆中使用哪种照明或哪种保护或恢复技术在任何发光下最佳地保持原始件的颜色外观时,这一方法是一个强大的艺术和遗产专业人员。光谱成像技术克服了诸如分光光度计的公共面积的点测量装置的局限性,允许局部研究像素方向或由选定的区域进行。据我们所知,这是第一项可用的学习,它使用拟议的CIE(委托Internationale deL'éclAirage)发光二极管(LED)光源在艺术和遗产科学的背景下,将它们与三个主要的Cie发光体A比较, D50和D65。为此,已经使用与Ciecam02中的色度适配变换类似于晶片02中的D65下的相应颜色。对于所研究的样本,与标准CIE光源的平均CIEE2000颜色差异最低的CIE LED光源是D50和D65的LED-V1,分别为1.23,1.07和1.57个单位。学习的工作是摩尔人的普拉斯特·弗里泽的普拉斯特·弗里泽,从阿罕布拉博物馆(格拉纳达,西班牙)展出的纳斯里德时期(12-15世纪)铺面。

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