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公开(公告)号：WO2022086550A1
公开(公告)日：2022-04-28
申请号：PCT/US2020/057017
申请日：2020-10-23
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： ETCHEBEHERE JUAN, Sergio , MOROVIC, Peter , MOROVIC, Jan , GOMEZ MINANO, Hector
IPC: H04N1/60
Abstract: Certain examples relate to a method of a method of method of converting inkvectors to NPac. The method comprises obtaining an ink-vector for an image to be printed and responsive to determining that the ink-vector is convertible to a corresponding Neugebauer Primary area coverage (NPac) using a first set of Neugebauer Primaries (NP), converting the ink-vector to the NPac using the first set of NP. When the ink-vector is not convertible to a corresponding NPac using a first set of NP, the method adds an NP to the first set of NP from a second set of NP in order to generate an enhanced first set of NP and converts the ink-vector to the NPac using the enhanced first set of NP. The method may additionally or alternatively adjust the ink-vector to be within a convex hull of a set of ink-vectors convertible to NPac using the first set of NP and converting the adjusted ink-vector to a corresponding NPac.
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公开(公告)号：WO2022081171A1
公开(公告)日：2022-04-21
申请号：PCT/US2020/056057
申请日：2020-10-16
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： MOROVIC, Jan , MOROVIC, Peter
Abstract: Certain examples relate to a method of a method of color prediction in multiple rendering contexts. In one example the method determines a plurality of color prediction models for respective color rendering contexts, each color prediction model mapping between a device dependent color and a rendered color. Measurement data of the rendered color in one said context obtained and mapped to a corrected device color. The corrected device color may be used to predict rendered corrected color for another said context using respective color prediction models.
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公开(公告)号：WO2021150242A1
公开(公告)日：2021-07-29
申请号：PCT/US2020/014966
申请日：2020-01-24
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： ARNABAT BENEDICTO, Jordi , MOROVIC, Jan , MOROVIC, Peter
Abstract: Disclosed is a non-transitory computer readable storage medium, a computer-implemented method and an imaging color profile of an imaging apparatus. A processor retrieves the color profile of the imaging apparatus from data storage, the color profile comprising a first plurality of associations between a first plurality of color values in a first color space and a second plurality of color values in a second color space. The processor receives input data indicating a determined association, the determined association being an association between a first determined color value in the first color space and a second determined color value in the second color space. The processor performs an update process to update the first plurality of associations, the update process comprising performing an interpolation process using the determined association and an association of the first plurality of associations.
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公开(公告)号：WO2021061141A1
公开(公告)日：2021-04-01
申请号：PCT/US2019/053288
申请日：2019-09-26
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： MOROVIC, Peter , MOROVIC, Jan , GOMEZ MINANO, Hector
Abstract: In an example, a method includes determining, using processing circuitry, a first print coverage vector associated with an estimated colorimetry which corresponds to a target colorimetry, wherein the estimated colorimetry of the print coverage vector is based on a first color model, the first print coverage vector being optimised relative to a first metric. The method may further include determining, using processing circuitry, a predicted colorimetry of the first print coverage vector based on a second color model.
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公开(公告)号：WO2021054972A1
公开(公告)日：2021-03-25
申请号：PCT/US2019/052152
申请日：2019-09-20
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： MOROVIC, Peter , MOROVIC, Jan
Abstract: Examples of a method and a system measure colorimetric data of a set of color samples deposited on a reference substrate and on at least one further substrate having distinct colors from one another. Based on the measured colorimetric data, estimate functions are applied for mapping between the colorimetric data of the color samples deposited on differently colored substrates.
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Patent Agency Ranking
公开(公告)号：WO2020072051A1
公开(公告)日：2020-04-09
申请号：PCT/US2018/054229
申请日：2018-10-03
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： HUERTAS DELGADO, Juan Miguel , VILAR, Jordi , ARNABAT BENEDICTO, Jordi , MOROVIC, Jan
IPC: H04N1/60
Abstract: A method comprises obtaining at a processor a first color gamut and a second gamut represented in a first color space. The first and second gamuts are represented as first and second objects in a second color space, with each object comprising a plurality of nodes. For each node, an index is provided indicating a position in the first color space to which that node corresponds. A further index is provided indicating a position, in the first color space, of the node relative to at least one other node of the object to which the node belongs. Each node of the first object corresponds with a node of the second object providing a mapping between the objects, using the further index. The index of at least one of the first object nodes is adjusted based on the corresponding node of the second object producing a mapping between the gamuts.
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公开(公告)号：WO2019212462A1
公开(公告)日：2019-11-07
申请号：PCT/US2018/030116
申请日：2018-04-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： MOROVIC, Peter , MOROVIC, Jan , DIEGO GUTIERREZ, Victor , CAMPA COLOMA, Alex , MAESTRO GARCIA, Javier
IPC: H04N1/60
Abstract: In an example a method includes deriving a print agent coverage vector specifying an area coverage for each of a plurality of elements, wherein each element is associated with a print agent, a print agent combination or an absence of print agent. Deriving the print agent coverage vector comprises, for a first element of the print agent coverage vector, applying a first weighting function which varies based on an intended area color value.
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公开(公告)号：WO2019172919A1
公开(公告)日：2019-09-12
申请号：PCT/US2018/021621
申请日：2018-03-08
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： MOROVIC, Peter , MOROVIC, Jan , GASPARIN TALARN, Pere , DIEGO GUTIERREZ, Victor , MAESTRO GARCIA, Javier
IPC: H04N1/60
Abstract: Certain examples described herein relate to printer calibration. In some cases, adjustment data is received, indicating an adjustment to be applied to a given colorant. A Neugebauer Primary area coverage (NPac) vector defining an operating set of Neugebauer Primaries (NPs) is obtained. Configuration data is determined, dependent on the operating set of NPs. The configuration data maps colorant adjustments to relationships between NPs in the operating set, for both an increase and a decrease in the given colorant. In some cases, the configuration data and the adjustment parameters are used to identify first and second subsets of the operating set of NPs. The NPac vector is adjusted by decreasing an area coverage of an NP in the first subset and complementarily increasing an area coverage of an NP in the second subset.
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公开(公告)号：WO2018199882A1
公开(公告)日：2018-11-01
申请号：PCT/US2017/029091
申请日：2017-04-24
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： FARINA VARGAS, Xavier , MOROVIC, Peter , MOROVIC, Jan
Abstract: A method is described in which a color space vector is transformed into a Neugebauer primary area coverage, NPac, vector, to be used for printing, on the basis of criteria associated to amounts or probabilities of Neugebauer primaries, NPs.
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公开(公告)号：WO2018147861A1
公开(公告)日：2018-08-16
申请号：PCT/US2017/017343
申请日：2017-02-10
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： MOROVIC, Peter , MOROVIC, Jan , GOMEZ MINANO, Hector
IPC: B41J29/393 , G01J3/46
Abstract: A method of calibrating a printing system. Data defining a color mapping that maps a first set of n-dimensional color Input points to a corresponding second set of n-dimensional color output points, the color mapping representing a measured behavior of the printing system, is obtained. A smoothed mapping function of color input points that satisfies a predetermined optimization condition based on a mapping error between the smoothed mapping function and the color mapping is determined. The mapping error is a function of individual errors between outputs of the smoothed mapping function as applied to respective color input points in the first set of color input points and corresponding color output points from the second set of color output points as mapped from the respective color input points by the color mapping. The smoothed mapping function is used to calibrate the printing system.
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