公开(公告)号：US12166945B1

公开(公告)日：2024-12-10

申请号：US18473497

申请日：2023-09-25

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

Inventor： Peter Morovic ,  Jan Morovic ,  Hector Gomez Minano ,  Sergio Etchebehere Juan

IPC: H04N1/40 ,  G06K15/02 ,  H04N1/00 ,  H04N1/23 ,  H04N1/405 ,  H04N1/52

Abstract: Systems, apparatuses, and methods may provide for technology to control the printing of halftoning screen signatures for various levels of prints. For example, such prints may include regular edition prints or limited edition prints. During printing, a first halftoning screen is associated with one or more of the regular edition prints and a second halftoning screen is associated with the limited edition print, in some implementations. The second halftoning screen has a spatial frequency that is substantially the same as the first halftoning screen while having a spatial signature different from the first halftoning screen. Additionally, the second halftoning screen further may have spectral properties that are substantially the same as the first halftoning screen. During printing, two different printed copies of an image are formed using the first halftoning screen and the second halftoning screen.

公开(公告)号：US11665304B1

公开(公告)日：2023-05-30

申请号：US17806101

申请日：2022-06-09

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

Inventor： Sergio Etchebehere Juan ,  Peter Morovic ,  Javier Maestro Garcia ,  Pere Gasparin Talarn ,  Jan Morovic

IPC: H04N1/60 ,  H04N1/52

CPC classification number: H04N1/6019 ,  H04N1/52

Abstract: A system encodes a plurality of colorant vectors of a printer in a Neugebauer Primary area coverage (NPac) vector for use in selecting colorants to output an image by the printer. The encoding includes using a function that relates the plurality of colorant vectors to an NP matrix including a plurality of sets of NPs that correspond to different colorant vectors of the plurality of colorant vectors, and determining the NPac vector based on achieving an objective for the function.

公开(公告)号：US20220131998A1

公开(公告)日：2022-04-28

申请号：US17419390

申请日：2019-07-15

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

Inventor： Peter Morovic ,  Jan Morovic ,  Sergio Etchebehere Juan ,  Tanausu Ramirez Garcia ,  Hector Gomez Minano

IPC: H04N1/60 ,  G06K9/62 ,  G06N20/20

Abstract: Certain examples relate to a method of color prediction. Data indicative of color characteristics measured from a number of color test patches is obtained. Data indicative of combinations of color resources used to render the color test patches on a color rendering device is obtained. A first predictive model is trained using the data indicative of the combinations of color resources as an input and corresponding data indicative of color characteristics as ground truth outputs. A second predictive model is trained using the output data from the first predictive model as an input and the corresponding data indicative of color characteristics as ground truth outputs. A progressive mapping is implemented by the first and second predictive models to predict color characteristics rendered by the color rendering device given a combination of color resources.

公开(公告)号：US11283965B2

公开(公告)日：2022-03-22

申请号：US17311041

申请日：2018-12-14

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

Inventor： Hector Gomez Minano ,  Peter Morovic ,  Jan Morovic ,  Sergio Etchebehere Juan

IPC: H04N1/60

Abstract: A print calibration system comprising a printing device to apply print material to a print target in a printing process, a memory for storing a lookup table; and a processor. The processor causes the printing device to print calibration points for reproducing a color ramp, by receiving a plurality of Neugebauer Primary area coverage (‘NPac’) points representing the plurality of calibration points and determining a hue angle and color space based on the NPac points. A plurality of nodes distributed between a first node and a second node of a sectional representation of the NPac points is determined. A lookup table is generated based on a relationship between the plurality of nodes and the NPac points for use during the printing process, wherein the lookup table comprises values to map between a first color space and a second color space, the lookup table is then provided to the printing device.