公开(公告)号：US20230319192A1

公开(公告)日：2023-10-05

申请号：US18296085

申请日：2023-04-05

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Eduardo AMELA CONESA ,  Diana CANTO ESTANY ,  Marta BLANCH PINOL

IPC: H04N1/00 ,  H04N1/393 ,  H04N1/60

CPC classification number: H04N1/00023 ,  H04N1/3935 ,  H04N1/6038 ,  H04N1/00068

Abstract: A method of digital printing is disclosed in which a digital image to be printed has at least one region having pixels comprising superpositioned layers of a first ink and a second ink. The method includes producing at least one sample print and calibrating misalignment of the superpositioned layers at a plurality of calibration locations on the sample print. The resultant misalignment data is provided to a morphing program to determine a pre-deformation of the digital image to compensate for misalignment during printing. An apparatus and a machine-readable storage medium comprising instructions executable by a processor are also disclosed.

公开(公告)号：US20230264481A1

公开(公告)日：2023-08-24

申请号：US18004062

申请日：2020-07-02

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Eduardo AMELA CONESA ,  Marta BLANCH PINOL ,  Diana CANTO ESTANY

IPC: B41J2/21 ,  G06K15/02 ,  G06T7/00 ,  G06T7/13

CPC classification number: B41J2/2132 ,  G06K15/027 ,  G06T7/0004 ,  G06T7/13 ,  G06K2215/101 ,  G06T2207/30144

Abstract: The disclosure relates to the analysis of digital contone image data (302) to compensate for a printing artefact, by identifying overlapping segments (202, 204) where print agent is to be printed in adjacent bands of the image, and defining a compensation for the artefact in an edge region (208) of a segment (204) based on an evaluation of an artefact criterion. Adjusted digital contone image data (316) is defined based on the compensation.

公开(公告)号：US20210146682A1

公开(公告)日：2021-05-20

申请号：US16616919

申请日：2017-07-17

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Sara MOLINS CABANI ,  Jordi HERNANDEZ CREUS ,  Diana CANTO ESTANY

IPC: B41J2/045 ,  B41J2/165

Abstract: Example systems to determine print fluid ejection nozzle health for a printer device are disclosed along with corresponding methods. In an example, the system includes an image recording device to record an image of print fluid ejected from a print fluid ejection nozzle and disposed on a printable surface. In addition, the system includes an image processor to analyse the image to provide a result based on a characteristic of the image that are representative of the print fluid disposed on the printable surface. Further, the system includes a controller to receive the result and assign a nozzle health category to the print fluid ejection nozzle in dependence on the result.