multi-print register measurement process, multi-print register measurement and correction process and multi-print register measurement device

摘要

A process of measuring the registration between print impressions (ad) provided in the actual printed area (epa) of the printed material surface is described, wherein the multicolored print (ad) is formed on the printed material by one or more presses and includes at least first pattern (a) and second pattern (b) differentiable from first pattern (a), wherein the actual printed area (epa) has an individual print matrix arrangement (p), each equipped with multicolored (ad) printing and are repeated over the surface of the effective printed area (epa) along a row and column pattern. the actual print measurement measurement between the first and second standards (a, b) as indicated on the printed matter is derived from processing and finding correspondence between (i) at least one image sample (sia, sib) of the material a print covering at least a portion of the first and second patterns (a, b) and (ii) at least one corresponding reference image (ria, rib) generated using prepress design data of the first and second patterns (a, b ). In addition, the process is repeated for several individual prints (p) to derive a set of several measurements from the actual print register between the first and second patterns (a, b) at various print locations over the actual printed area. (epa), where this set of various measurements is mapped to a corresponding print-between registration map (mb-a, mc-a, md-a, ...) that is representative of registration deviations between impressions at various locations Printing. Also described is a metering device for conducting this process and a process for measuring and correcting registration between multicolored print impressions.