Method and computer program product for predicting spectral characteristics of ink applied to a base material
摘要
說明書
Here, Xb, Yb, and Zb are tristimulus values of a background color, Xf, Yf, and Zf are tristimulus values of a foreground color, jx, jy, and jz are scaling coefficients, and kx, ky, and kz are constants. Hereinafter, jx, jy, jz, kx, ky, and kz are collectively referred to as “overprint coefficient”.
Meanwhile, color reproduction methods include additive color mixing and subtractive color mixing. In the case of printing, the subtractive color mixing is applied for color reproduction. In this regard, if ideal subtractive color mixing is performed, the stimulus value X of the color obtained by overprinting is represented by “Xb×Xf” (the same applies to the stimulus values Y and Z), for example. However, in order to obtain a more accurate value, it is necessary to make a correction in consideration of an error caused by the use of an opaque ink and reflection of light on the surface. Therefore, in the Deshpande et al. method, a correction using a linear equation is performed as shown in the above Equations (1) to (3).
