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Method and computer program product for predicting spectral characteristics of ink applied to a base material

專(zhuān)利號(hào)
US11659131B2
公開(kāi)日期
2023-05-23
申請(qǐng)人
SCREEN HOLDINGS CO., LTD.（JP Kyoto）
發(fā)明人
Kenichi Yokouchi
IPC分類(lèi)
H04N1/60; H04N1/54
技術(shù)領(lǐng)域
gradation,spectral,prediction,value,color,relational,values,equation,target,obtained
地域： Kyoto

摘要

First relational equations which represent characteristics of respective sample colors are obtained, and for the respective sample colors, prediction values of spectral characteristics of characteristics-acquired gradation values for a prediction target color are obtained using the first relational equations. Difference values between the prediction values and actual measurement values are obtained, and a sample color for which a minimum difference value is obtained is selected as a reference color. A second relational equation that represents characteristics of the reference color is obtained, and a prediction value of spectral characteristics of a prediction target gradation value for the prediction target color is obtained using the second relational equation.

說(shuō)明書(shū)

α=?(1/(2x))·ln(R/R0)??(8)
<1.5.5 Fifth Modified Example>

In the above-described first embodiment, as the first relational equation, an equation is adopted, which represents the relationship between the spectral reflectances of the maximum gradation value and the spectral reflectances of the characteristics-acquired gradation value. However, the relationship represented by the first relational equation is not limited to this. For example, an equation that represents a relationship between the spectral absorption factors of the maximum gradation value and the spectral absorption factors of the characteristics-acquired gradation value, an equation that represents a relationship between the spectral reflectances of the maximum gradation value and the spectral absorption factors of the characteristics-acquired gradation value, or the like can be adopted as the first relational equation. Likewise, an equation which represents a relationship between the spectral absorption factors of the maximum gradation value and the spectral absorption factors of the prediction target gradation value for the reference color, an equation that represents a relationship between the spectral reflectances of the maximum gradation value and the spectral absorption factors of the prediction target gradation value for the reference color, or the like can also be adopted as the second relational equation.

<2. Second Embodiment>

<2.1 Preliminary Study>

權(quán)利要求

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