公开(公告)号：US10897556B2

公开(公告)日：2021-01-19

申请号：US16630356

申请日：2017-09-26

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

Inventor： Peter Morovic ,  Jan Morovic

IPC: H04N1/60

Abstract: Certain examples described herein relate to generating a Neugebauer Primary area coverage (NPac) vector. In certain cases, a first plurality of Neugebauer Primaries (NPs) defined by a first NPac vector is determined, the first plurality of NPs defining a set of characteristics of a printing process. A second NPac vector, defining a second plurality of NPs, is generated based on the set of characteristics and a criterion relating to the printing process.

公开(公告)号：US20210003451A1

公开(公告)日：2021-01-07

申请号：US16978505

申请日：2018-03-26

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

Inventor： Peter Morovic ,  Jan Morovic

IPC: G01J3/46 ,  G01J3/50

Abstract: Certain examples relate to emulating a spectral measurement device in a color measurement apparatus. In these examples, a primary spectral measurement device measures a first spectral characteristic of a rendered color output. A predictive model, parametrized by parameter values, is applied to the measurement from the primary spectral measurement device to determine a predicted measurement of a second spectral characteristic of the rendered color output which would be measured by an ancillary spectral measurement device. Parameter values are generated by training the predictive model with data from the primary spectral measurement device and the ancillary spectral measurement device.

公开(公告)号：US10809699B2

公开(公告)日：2020-10-20

申请号：US15544936

申请日：2015-04-24

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

Inventor： Jan Morovic ,  Peter Morovic ,  Scott White ,  Juan Manuel Garcia Reyero Vinas

IPC: G05B19/4099 ,  B33Y50/00 ,  B29C64/386

Abstract: The application refers to a method for generating three-dimensional object models for an additive manufacturing process in a layer-by-layer manner, e.g. 3D-printing, and to generating control data for use by the print apparatus. The object models are generated from a geometric description and from object generation data, which comprise the print apparatus and attributes such as a halftone scheme, a print apparatus setting, an object structure and a print material coverage representation. The method is implemented in the form of a computer software product and generates data specific for each identifies printing device.

公开(公告)号：US10694076B2

公开(公告)日：2020-06-23

申请号：US16337631

申请日：2017-01-30

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

Inventor： Jan Morovic ,  Peter Morovic

IPC: H04N1/60

Abstract: A method of calibrating an area coverage representation of a color. A first area coverage of a Neugebauer primary in an area coverage representation of a color is determined based on a plurality of reference area coverage parameters for the Neugebauer primary, wherein each reference area coverage parameter in the plurality of reference area coverage parameters corresponds to a respective colorant deposition subsystem in a plurality of colorant deposition subsystems. A second area coverage of the Neugebauer primary is determined based on the plurality of reference area coverage parameters and a plurality of calibration parameters for the Neugebauer primary, wherein each calibration parameter in the plurality of calibration parameters corresponds to a respective colorant deposition subsystem in the plurality of colorant deposition subsystems. A plurality of calibrated area coverage parameters are determined for the Neugebauer primary in the area coverage representation of the color based on the plurality of reference area coverage parameters, the plurality of calibration parameters and a difference in area coverage between the first area coverage and the second area coverage.

公开(公告)号：US10694075B2

公开(公告)日：2020-06-23

申请号：US16476494

申请日：2017-04-21

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

Inventor： Jan Morovic ,  Peter Morovic

IPC: H04N1/60

Abstract: In an example, a method includes determining a plurality of print coverage vectors, each of the print coverage vectors specifying a common amount of a selected print agent. The method may further comprise determining a colorimetry provided by each of the print coverage vectors and dividing a range of colorimetries into partitions in a colorimetric space. For each of a plurality of the partitions, the method may include determining a characteristic of each print coverage vector resulting in a colorimetry within that partition and selecting a print coverage vector for that partition based on the determination. A color mapping resource may be determined based on the selected print coverage vectors.

公开(公告)号：US20200125904A1

公开(公告)日：2020-04-23

申请号：US16477867

申请日：2017-04-20

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

Inventor： Jan Morovic ,  Peter Morovic

IPC: G06K15/02

Abstract: A method is disclosed in which a lookup table (LUT) that maps chromatic and achromatic device color space vectors into Neugebauer primary area coverages (NPacs) is obtained. According to the method, a LUT that maps chromatic device color space vectors into NPacs is combined with a LUT that maps achromatic device color space vectors into NPacs.

公开(公告)号：US10516806B2

公开(公告)日：2019-12-24

申请号：US14899665

申请日：2013-06-28

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

Inventor： Juan Manuel Garcia Reyero Viñas ,  Paolo Faraboschi ,  Jan Morovic ,  Peter Morovic

IPC: H04N1/60 ,  H04N1/52 ,  H04N1/54

Abstract: A color image is processed into a renderable image. The color image comprises a plurality of pixels. Each pixel has colorimetry defined in a first color space. The renderable image comprises a plurality of renderable pixels defined by a device-vector in a second color space. For each pixel: a device-vector defined in the second color space is selected (301) based on the colorimetry defined in a first color space of the pixel. The device-vector comprises a plurality of elements. Each element includes an identifier and an accumulated weighting. An element of the selected device-vector is reselected (303) until the accumulated weighting (a) is greater than a threshold value (t) associated with the pixel (305). The levels for each color of the second color space (or mappings) for the currently selected (307) element of the selected device-vector is determined (309) to convert the pixel into a renderable pixel.

公开(公告)号：US20190381735A1

公开(公告)日：2019-12-19

申请号：US16557066

申请日：2019-08-30

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

Inventor： Peter Morovic ,  Jan Morovic

IPC: B29C64/386 ,  B33Y50/00 ,  G06F17/50

Abstract: Certain examples described herein relate to apparatus arranged to produce a three-dimensional object. These examples enable color and material properties of such an apparatus to be characterized. This is achieved through the generation of configuration data for the apparatus that maps at least one color property to one or more material volume coverage vector values. This allows for appropriate quantities of materials available to the apparatus to be used to produce colors defined in received object data for the three-dimensional object.

公开(公告)号：US20190297225A1

公开(公告)日：2019-09-26

申请号：US16302616

申请日：2016-09-30

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

Inventor： Javier Maestro Garcia ,  Peter Morovic ,  Jan Morovic

IPC: H04N1/52 ,  H04N1/60 ,  H04N1/64

Abstract: A method of generating a set of halftone parameters. The method comprises assigning a first set of halftone parameters to a first location in a color space, the first location in the color space corresponding to a first color, and assigning a second set of halftone parameters to a second location in the color space, the second location in the color space corresponding to a second color. An interpolating between the first set of halftone parameters and the second set of halftone parameters is performed, based on the first location and the second location, to determine a third set of halftone parameters corresponding to a third location in the color space. The result of the interpolation is output data associating the third set of halftone parameters with a third color corresponding to the third location in the color space. The first set of halftone parameters may represent a relative area coverage of a first colorant combination and the second set of halftone parameters may represent a relative area coverage of a second colorant combination.

公开(公告)号：US10416656B2

公开(公告)日：2019-09-17

申请号：US15514767

申请日：2014-10-01

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

Inventor： Peter Morovic ,  Jan Morovic

IPC: G05B19/4099 ,  H04N1/60 ,  B33Y50/02 ,  B33Y50/00 ,  B29C64/386

Abstract: Certain examples for generating control data for production of a three-dimensional object are described. In one example, the three-dimensional object to be generated is represented using object model data and object property data. This data is processed to generate a rasterized representation of a plane of the three-dimensional object. The rasterized representation of the plane is then mapped to an area coverage representation defines object property data at a given location in the plane as one or more proportions of a set of available object properties at the location, for example material combinations. The area coverage representation is then halftoned to generate the control data for three-dimensional printing.