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首页> 外文期刊>Journal of Imaging Science and Technology >Spectral Prediction of Juxtaposed Halftones Relying on the Two-by-Two Dot Centering Model
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Spectral Prediction of Juxtaposed Halftones Relying on the Two-by-Two Dot Centering Model

机译：基于二乘二点对中模型的并置半色调的谱预测

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摘要

In a color reproduction workflow, spectral prediction models are useful for establishing the correspondence between colorant surface coverages and resulting printed halftone color. Spectral prediction models enable calculation of the color gamut and establishment of the color separation tables. Discrete line juxtaposed halftoning, a recently proposed algorithm, is characterized by the fact that colorants formed by inks and ink superpositions are placed side by side. Juxtaposed halftoning is necessary when printing with special inks such as opaque or metallic inks. In order to predict the color of classical halftones, the Yule-Nielsen modified spectral Neugebauer model is generally used. However, this model may not predict the color of juxtaposed halftones, since the effective surface coverages of colorants and of possible colorant overlaps are unknown. In contrast, the two-by-two dot centering spectral prediction model developed by S. G. Wang enables the reflectance of slightly overlapping colorants to be captured and is therefore appropriate for predicting the color of juxtaposed halftones. Since this model requires a large calibration set, the authors use an estimation technique which predicts more than 90% of the two-by-two calibration pattern reflectances by measuring less than 10% of them. For juxtaposed halftoning, the two-by-two dot centering model offers high prediction accuracies and outperforms the different variants of the Yule-Nielsen spectral Neugebauer model for comparable setups.
机译：在色彩再现工作流程中，光谱预测模型可用于建立着色剂表面覆盖率与所得印刷半色调之间的对应关系。光谱预测模型可以计算色域和建立分色表。离散线并置的半色调是最近提出的算法，其特征在于由墨水和墨水叠加形成的色料并排放置。当使用特殊油墨（例如不透明或金属油墨）进行打印时，并列的半色调是必要的。为了预测经典半色调的颜色，通常使用Yule-Nielsen修改的光谱Neugebauer模型。但是，该模型可能无法预测并置的半色调的颜色，因为尚不清楚着色剂的有效表面覆盖范围以及可能的着色剂重叠。相比之下，S。G. Wang开发的两乘两点居中光谱预测模型可以捕获稍有重叠的色料的反射率，因此适合预测并列半色调的颜色。由于此模型需要较大的校准集，因此作者使用一种估算技术，通过测量不到10％的比例，可以预测90％的二乘二校准图案反射率。对于并列的半色调，二乘二点对中模型提供了较高的预测精度，并且在可比较的设置方面优于Yule-Nielsen光谱Neugebauer模型的不同变体。

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  • 来源
    《Journal of Imaging Science and Technology》 |2013年第4期|040501.1-040501.9|共9页
  • 作者

    Vahid Babaei; Roger D. Hersch;

  • 作者单位

    Ecole Polytechnique Vederale de Lausanne (EPFL), Station 14,1015 Lausanne, Switzerland;

    Ecole Polytechnique Vederale de Lausanne (EPFL), Station 14,1015 Lausanne, Switzerland;

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