公开(公告)号：US20170197448A1

公开(公告)日：2017-07-13

申请号：US15326004

申请日：2014-07-28

Applicant: HEWLETT-PACKARD INDIGO B.V.

Inventor： Eli VELNER ,  Gilad GREENBERG ,  Bar-Navi MIKI

IPC: B41J29/393 ,  B41J2/21

CPC classification number: B41J29/393 ,  B41F33/0036 ,  B41J2/21 ,  G01J3/0278 ,  G01J3/524 ,  G01N21/274 ,  H04N1/6036 ,  H04N1/6044

Abstract: A method and system for performing color print quality monitoring for a color printing process, the method includes determining a calibration distance (ZCAL) between a Spectrophotometer (140) and an associated calibration patch (310) that provides a maximum luminescence value (LMAX) detected by the Spectrophotometer. The Spectrophotometer (140) or patch distance (Z1) between the Spectrophotometer and a color calibration patch (320) printed on a sheet (155) is determined from a first maximum color patch luminescence value (L1). A first color reading of the color calibration patch is taken and a second color patch distance (Z2) between the Spectrophotometer and a different area of the color calibration patch (320) is determined to provide a second maximum color patch luminescence value (L2). A second color reading of the color calibration patch is taken and compared with the first color reading to determine if the printing process needs adjusting.