21 December 1999 Color reproduction based on spectral reflectance
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Abstract
In this paper, we describe the method for color reproduction based on the spectral reflectance. The accuracy of color calibration depends on the number and the distribution of the color patches as well as color calibration method. The effect of dot overlap between the neighboring dots makes the printed color patches significantly darker. Therefore we propose a new design of the color patches where the distribution of the printed spectral reflectances is uniform in the spectral domain. We measure the spectral reflectances of the color patches with an inkjet printer. The basis functions are extracted from the measured patch data using principal component analysis by Karhunen-Loeve expansion. A neural network is used to transform the coefficients of principal component analysis to CMY colorants. This patch design increases the accuracy of the conversion of the neural network. The accuracy of color reproduction is evaluated according to the number and the distribution of the color patches in terms of the root mean square error and the color difference.
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Eul Hwan Lee, Suk Chul Ahn, Jae Ho Kim, "Color reproduction based on spectral reflectance", Proc. SPIE 3963, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts V, (21 December 1999); doi: 10.1117/12.373389; https://doi.org/10.1117/12.373389
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