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

專利號
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
技術領域
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

Accordingly, the applicant of the present application filed for an invention of a color prediction method for predicting the color of the patch to be included in the C×F chart (refer to Japanese Laid-Open Patent Publication No. 2020-159821). A schematic procedure of a color prediction process described in Japanese Laid-Open Patent Publication No. 2020-159821 is as follows. First, from among a plurality of sample colors for which spectral reflectances of a plurality of patches are obtained, a color close to a prediction target color is selected as a similar color. Next, for the similar color, a relational equation is obtained, which represents a relationship between spectral reflectances of a solid patch (a patch with a maximum ink density) and spectral reflectances of a color prediction target patch. Finally, the spectral reflectances of the solid patch for the prediction target color are applied to the relational equation, whereby prediction values of the spectral reflectances of the color prediction target patch for the prediction target color are obtained.

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