Ink print-through color value estimation method and apparatus, color value estimation method and apparatus taking ink print-though into consideration, target color setting method and apparatus taking ink print-through into consideration as well as controlling method and apparatus for printing press

摘要

The present invention relates to a color value estimation method and apparatus for a printing press which make it possible to estimate a color value with high accuracy taking ink print-through of a sheet-formed printed matter which is printed on the opposite faces. A one-face side picture data and the other face side picture data to be printed on a printing sheet are acquired, and a basic print-through color value from the other face side to the one-face side is calculated from the other face side picture data using a correlation relationship with a basic color value where one-face side with respect to the other face side picture data is blank. Then, the basic print-through color value is corrected based on the degree of the basic color value to the other face side picture data and the one-face side picture data corresponding to the other face side picture data to calculate a print-through color value. Further, a one-face side basic color value where the other face side of the printing sheet is blank is calculated from the one-face side picture data using the correlation relationship with the basic color value where the one-face side with respect to the other face side picture data is blank. Then, a one-face side color value, which includes a value by ink print-through, to be detected by a colorimeter is estimated from the calculated print-through color value and one-face side basic color value.