Visualizing image registration information
AssigneeHP Indigo B.V.
InventorsMotti-Mordechay Silberberg, Yaron Hershman
Life of this patent
Estimating the term…
Abstract
In an example implementation, a method of providing image registration information in a digital printing press includes imaging a printed page on an impression drum of a digital printing press, determining image registration information from printed content on the page, and displaying a graphical visualization of the image registration information on a user interface screen of the digital printing press.
Claims15
A printing method for a digital printing press, the method comprising:
- printing a print job image on a page including transferring each of multiple individual color separations successively from an intermediate transfer member to the page while the page is held on an impression drum;
- printing target registration points on the page together with the print job image;
- capturing an image of the printed page while the printed page is still on the impression drum;
- determining image edge registration information from the captured image by measuring a distance between target registration points printed on the printed page and an edge of the printed page;
- displaying a graphical visualization of the image edge registration information on a user interface screen of the digital printing press;
- and
- making press adjustments to overcome an edge registration error shown in the displayed visualization.
A liquid electrophotographic digital printing press comprising:
- a user interface screen;
- a print engine including a photo imaging component to hold a single color separation of an ink image, an intermediate transfer drum to receive the single color separation from the photo imaging component, and an impression drum to hold a sheet of print media to receive each of multiple individual color separations successively from the intermediate transfer drum to form the ink image on the sheet as a printed page;
- an imaging device to capture an image of each of multiple printed pages while each printed page is on the impression drum;
- a controller operatively connected to the user interface screen, the print engine and the imaging device to cause the print engine to print each page and to cause the imaging device to capture an image of each of the printed pages, the controller including a measurement module to measure from the images captured by the imaging device a misregistration of the ink image on one or more of the printed pages with respect to an edge of the printed page and a visualization module to cause the user interface screen to display the edge misregistration in graphical form.
A non-transitory machine-readable storage medium storing instructions that when executed by a processor of a printing device, cause the printing device to:
- print a print job image on a page including to transfer each of multiple individual color separations successively from an intermediate transfer member to the page while the page is held on an impression drum;
- print target registration points on the page together with the print job image;
- measure distances between edges of the page and the target registration points to determine image edge registration information;
- display the image registration information in a visualized graphical form on a user interface screen of the printing device in real-time.
Dependencies are inferred from the claim text.