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

專利號(hào)
US11659131B2
公開日期
2023-05-23
申請人
SCREEN HOLDINGS CO., LTD.（JP Kyoto）
發(fā)明人
Kenichi Yokouchi
IPC分類
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.

說明書

After the second relational equation is obtained, the prediction values of the spectral reflectances of the gradation value included in the union among the plurality of gradation values serving as the prediction target gradation values are obtained by applying the spectral reflectances of the reference gradation value (the maximum gradation value or the characteristics-acquired gradation value) for the prediction target color to the corresponding second relational equation (Step S280). If eleven gradation values in increments of 0.1 from the gradation value of 0 to the gradation value of 1 are the prediction target gradation values, then in the example illustrated in FIG. 16, the prediction values of the spectral reflectances of the gradation values of 0, 0.2, 0.3, 0.5, 0.8, and 1 for the prediction target color are obtained by this Step S280. In this regard, for example, the prediction values of the spectral reflectances of the gradation value of 0.2 are obtained by applying the spectral reflectances of the gradation value of 0.3 for the prediction target color to the corresponding second relational equation. Further, for example, the prediction values of the spectral reflectances of the gradation value of 0.8 are obtained by applying the spectral reflectances of the gradation value of 1 for the prediction target color to the corresponding second relational equation. Note that, for the spectral reflectances of the gradation values of 0, 0.3, 0.5, and 1, actual measurement values may be directly used without using the second relational equations.

權(quán)利要求

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