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首页> 外文期刊>Journal of Imaging Science and Technology >A unified model of optical and physical dot gain in print color reproduction
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A unified model of optical and physical dot gain in print color reproduction

机译：印刷色彩复制中光学和物理点增益的统一模型

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摘要

A unified model coping with both physical and optical dot gains on print color tone reproduction is proposed. The physical dot gain, is approximated by a quadratic function of nominal dot percentages. The function, for each color, is characterized by a single parameter depending on printing technologies as well as ink-paper interactions, and has a symmetric form around where the nominal dot percentage is 50%. The parameter can be derived from the best fit for the model to measured data, such as spectral reflectance values or CIEXYZ tristimulus values. Applications to a color laser printer (on office copy paper) reproduces the experimental dot gain curves fairly well. Dependence on physical dot percentage, a summation of the nominal dot percentage and the corresponding physical dot gain, results in the optical dot gain and in turn the overall dot gain asymmetric forms, plotted against the nominal dot percentages. Furthermore, theoretical analysis reveals fundamental differences between physical and optical dot gains. Therefore, effects of optical dot gain can not be accurately represented by any physical extension in printing practices.
机译：提出了一种统一的模型，可以应对打印色调再现上的物理和光学点增益。物理点增益通过标称点百分比的二次函数来近似。对于每种颜色，该功能的特点是取决于打印技术和墨水-纸张相互作用的单个参数，并且在名义点百分比为50％的位置具有对称形式。该参数可以从模型对测量数据的最佳拟合中得出，例如光谱反射率值或CIEXYZ三刺激值。应用于彩色激光打印机（在办公室复印纸上）可以很好地再现实验点增益曲线。依赖于物理点百分比，标称点百分比与相应物理点增益之和，会导致光学点增益，进而导致相对于标称点百分比绘制的整体点增益不对称形式。此外，理论分析揭示了物理和光学点增益之间的根本差异。因此，在打印实践中，任何物理扩展都无法准确表示光学点增益的影响。

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