公开(公告)号：US10440231B2

公开(公告)日：2019-10-08

申请号：US16073393

申请日：2016-04-21

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

Inventor： Peter Morovic ,  Jan Morovic

IPC: H04N1/60 ,  H04N1/00 ,  H04N1/50 ,  H04N1/54

Abstract: A system includes a memory to store at least one Halftone Area Neugebauer Separation (HANS) look-up table (LUT) that represents a predetermined drop weight for N colorant channels of a printer. The HANS LUT provides a given Neugebauer Primary area coverage in response to a device color input value. Measurement data stored in the memory represents measured drop weight values for the N colorant channels of the printer. A processor executes instructions stored in the memory. The instructions are to compute a calibration element for the HANS LUT that describes a drop-weight deviation with respect to the HANS LUT based on the measured drop weight values. The instructions are to apply the calibration element to at least a portion of the HANS LUT to generate a calibrated LUT.

公开(公告)号：US10434716B2

公开(公告)日：2019-10-08

申请号：US15547443

申请日：2015-04-24

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

Inventor： Peter Morovic ,  Jan Morovic ,  Alejandro Manuel De Pena ,  Juan Manuel Garcia Reyero Vinas

IPC: B29C64/386 ,  H04N1/405 ,  B33Y50/02 ,  B29C64/393 ,  G05B19/4099 ,  H04N1/52 ,  B33Y50/00

Abstract: Methods and apparatus relating to substructures for three-dimensional objects are described. In an example, a method comprises receiving a lattice model having a consistent dimensionality and determining a substructure model representing a three-dimensional material structure, the substructure model being based on the lattice model and specifying a variable material distribution. The substructure model may be populated with halftone threshold data to provide a three-dimensional halftone threshold matrix.

公开(公告)号：US10424109B2

公开(公告)日：2019-09-24

申请号：US15544775

申请日：2015-04-24

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

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

IPC: G06T15/00 ,  G06T17/00 ,  B33Y50/00 ,  G06F17/50

Abstract: Methods and apparatus relating to three-dimensional object models are described. In one example, (i) data representing a geometrical description of a three-dimensional object defining object geometry in a geometric space and (ii) at least one object property description describing an object property in an object property space are received. The object property space and the geometric space are intersected to define an object model, wherein an object property is defined at an intersection between a described object property and defined object geometry.

公开(公告)号：US20190281191A1

公开(公告)日：2019-09-12

申请号：US16335655

申请日：2016-10-26

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

Inventor： Peter Morovic ,  Jan Morovic

IPC: H04N1/60 ,  B41J2/21

Abstract: An example method of setting ink limits for a printing system is described. The method involves printing a first set of color ramps. Each color ramp has test areas which are printed based different Neugebauer Primary Area Coverage (NPac) vectors. A test area for each color ramp is indicated that meets an image quality metric and Neugebauer Primary ink use limits are set based on these test areas. A second set of color ramps, for combinations of the set of available Neugebauer Primaries, is then printed, The test areas for each ramp are defined by monotonically-varying vector element values for one Neugebauer Primary in a combination and the second set of ramps are defined by monotonically-varying vector element values across said ramps for another Neugebauer Primary in a the combination. Test areas are then indicated again for the second set of color ramps to set ink use limits for the printing system.

公开(公告)号：US20190279054A1

公开(公告)日：2019-09-12

申请号：US16345898

申请日：2017-02-10

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

Inventor： Peter Morovic ,  Jan Morovic ,  Hector Gomez Minano

IPC: G06K15/02 ,  H04N1/60

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.

公开(公告)号：US10401834B2

公开(公告)日：2019-09-03

申请号：US15539832

申请日：2015-01-30

Applicant: Peter Morovic ,  Jan Morovic ,  Juan Manuel Garcia Reyero Vinas ,  HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

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

IPC: G05B19/4099 ,  B29C64/10

Abstract: In an example, a method for generating control data for production of a three-dimensional object is described. A model of the three-dimensional object is obtained as a array of voxels, and it is determined for each voxel whether that voxel comprises part of a first or a second sub-object of the three-dimensional object. Each first sub-object voxel is mapped to a volume coverage representation defining print material data for that voxel. The second sub-object voxels are mapped to a volume coverage representation defining common print material data for the voxels of second sub-object. Control data for printing the first sub-object is generated from the print material data for that voxel common print material data for the Control data for printing the second sub-object is generated according to the volume coverage representation for the second sub-object.

公开(公告)号：US10391709B2

公开(公告)日：2019-08-27

申请号：US15545775

申请日：2015-01-30

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

Inventor： Jan Morovic ,  Peter Morovic

IPC: G05B19/40 ,  B29C64/386 ,  G06T19/00 ,  B33Y50/00 ,  G05B19/4099 ,  H04N1/405

Abstract: Methods and apparatus relating to representation of a three-dimensional object are described. In an example, a converter for converting input object data representing a model of a three-dimensional object into a compressed form is provided. The converter comprises a data receiving module to receive data representing object properties of a three-dimensional object to be generated by additive manufacturing apparatus and a data identifying module to identify data representing a continuous region of the object with a common property specification. The converter further comprises a sub-region defining module to determine, within the data representing the continuous region, a set of contiguous sub-regions and an object data module to represent the continuous region as the set of sub-regions.

公开(公告)号：US20190238723A1

公开(公告)日：2019-08-01

申请号：US16327398

申请日：2016-10-24

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

Inventor： Peter Morovic ,  Jan Morovic ,  Hector Gomez Minano ,  Javier Maestro Garcia

IPC: H04N1/60 ,  B41J2/525

CPC classification number: H04N1/605 ,  B41J2/525 ,  H04N1/60

Abstract: A method of obtaining a calibration factor for color calibration of a printing system. The method includes printing, using the printing system, a plurality of Neugebauer primaries (NPs) each defined by a respective Neugebauer primary area coverage (NPac) vector. For each of the NPs, an area coverage change of the NP is determined from a measurement of a visual property for the NP and a measurement of the visual property for a corresponding reference NP corresponding to the respective NPac vector. The calibration N factor for the printing system is obtained based on the area coverage change for respective NPs of the plurality of NPs.

公开(公告)号：US10338568B2

公开(公告)日：2019-07-02

申请号：US15545709

申请日：2015-04-24

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

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

IPC: G05B19/40 ,  G05B19/4099 ,  H04N1/405 ,  B33Y50/00 ,  G06K15/02

Abstract: Methods and apparatus of determining a halftone scheme are described. In an example, data representing a three-dimensional object is obtained, the data comprising object model data representing the geometry of the three-dimensional object and object property data representing at least one object property of at least a portion of the object. It is determined if a halftone scheme dependent object property is specified by the object property data and a halftone scheme is determined. Data representing a portion of the object having a halftone scheme dependent object property is associated with a determined halftone scheme.

公开(公告)号：US10326910B2

公开(公告)日：2019-06-18

申请号：US15544796

申请日：2015-04-28

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

Inventor： Peter Morovic ,  Jan Morovic

IPC: B33Y50/00 ,  H04N1/405 ,  B33Y50/02 ,  B29C64/386

Abstract: Certain examples described herein relate to the use of three-dimensional threshold matrices in the production of three-dimensional objects. In one case, data values for a three-dimensional matrix for use in halftoning are assigned based on a structural volume coverage representation. In certain described cases, the structural volume coverage representation defines a probabilistic distribution of at least two different structures available for the production of the three-dimensional object. A comparison is performed based on data values for the structural volume coverage representation. The output of the comparison is a data value to be assigned to the three-dimensional matrix. The resultant three-dimensional matrix is used in a halftoning operation to control a structure distribution in the three-dimensional object.