公开(公告)号：US11267264B2

公开(公告)日：2022-03-08

申请号：US16563326

申请日：2019-09-06

申请人： HEIDELBERGER DRUCKMASCHINEN AG

发明人： Jan Krieger ,  Immanuel Fergen ,  Christoph Godau ,  Timo Volk ,  Manfred Schneider

IPC分类号： B41J11/42

摘要： A method for automated alignment and register measurement in a printing press provides for test patterns having multiple color separations to be printed by the printing press on a printing substrate, recorded by using at least one image sensor of an image acquisition system as a digital overall image, evaluated by a computer with respect to an alignment/register offset and then corrected by the computer for the alignment/register offset. Circular measuring marks having known diameter for each color separation are integrated into the test patterns and the computer ascertains the center position of each circular measuring mark with subpixel accuracy and thus computes the alignment/register offset by cutting out an image region having at least one circular measuring mark from the digital overall image and determining parameters of a model of a printing point of the circular measuring mark from the digital overall image.