Estimation of noise in the multispectral camera and recovery of spectral reflectance

数字博物馆是有价值的绘画作品的数字档案馆，是这些作品在显示设备上的逼真图像复制品。绘画的色彩外观和印象因照明而显着不同，即，它们取决于它们的光谱功率分布，例如日光或烛光以及它们的照度水平。考虑到人类视觉系统的色彩适应性，在各种照明下再现彩色图像已经进行了广泛的研究。在本报告中，描述了三种类型的绘画，如日本，通过使用图像数据准确地恢复油画和水彩画通过使用恢复的光谱反射率在显示设备上忠实地再现各种照明下的光。

Digital museum is the digital archive of valuable paintings and is the realistic image reproductions of them on a display device. The color appearance and the impression of a painting differ markedly with the illuminations, i.e., they depend on their spectral power distributions such as a daylight or a candlelight and their illuminance levels. Extensive studies have been carried out to reproduce color images under various illuminations by taking into account the chromatic adaptation of human visual system.In this report, it is described that spectral reflectances of three types of painting such as Japanese, oil color and water color paintings are accurately recovered by the use of image data without prior knowledge of color materials used to paint them and that the colors of a painting under various illuminations are reproduced faithfully on a display device through the use of the recovered spectral reflectances.