Patent ID: 8089667
Filing Date: 2012-01-03
Classification: B41F

Abstract:
1. A method for determining parameters relevant to the print quality of a printed product comprising the steps of: recording a macroscopic photogram of a measuring field of the printed product using a camera having a macro lens; determining an actual value of a parameter relevant to the print quality from the macroscopic photogram; comparing the actual value to a nominal value of the parameter relevant to the print quality; determining whether the measuring field is printed with adequate quality based on the comparison of the actual valve with the nominal value of the parameter relevant to the print quality; said camera inspecting the measuring field in RGB-channels and recording one macroscopic photogram and a gray scale value diagram of the measuring field for each RGB-channel, said measuring field consisting of a halftone measuring field for a printing ink, the actual value for the halftone measuring field being determined in the form of a geometric parameter for the halftone measuring filed; and said geometric parameter being for a round halftone dot of the halftone measuring field, and said geometric parameter being determined in the form of a first halftone dot deformation value that is based on a minimum halftone dot diameter and a maximum halftone dot diameter of the halftone dot.