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公开(公告)号：US10419642B2
公开(公告)日：2019-09-17
申请号：US16073405
申请日：2016-04-21
发明人： Jan Morovic , Peter Morovic
摘要： A system includes a memory to store pre-computed boundary look-up tables (LUTs) for respective drop weight boundary classes of a printer having a plurality of colorants. Each pre-computed boundary LUT provides one Neugebauer Primary area coverage (NPac) for each node of the LUT in response to a device color input value that corresponds to each node. Measurement data stored in the memory represent measured drop weight values for the plurality of different colorants of the printer. A processor executes instructions that interpolate among the pre-computed LUTs based on the measured drop weight values to determine a proportional weighting of each of the pre-computed LUTs.
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公开(公告)号：US20190210372A1
公开(公告)日：2019-07-11
申请号：US16336153
申请日：2016-09-27
摘要： A method of detecting printing fluid mixing is provided. A test pattern for at least one printing fluid is printed with a printing device. The test pattern for the at least one printing fluid is scanned with a scanning device. Colorimetric data of the test pattern for the at least one printing fluid are obtained. Metric values are determined from the colorimetric data. A statistical analysis is performed on the determined metric values. Based on the statistical analysis, it is determined whether printing fluid mixing has occurred and where printing fluid mixing has occurred.
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公开(公告)号：US10252513B2
公开(公告)日：2019-04-09
申请号：US15545264
申请日：2015-04-28
发明人： Peter Morovic , Jan Morovic
IPC分类号： G06F15/00 , B33Y50/02 , H04N1/405 , G06F17/50 , B29C64/386
摘要： 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 convex combination of the at least two different structures is determined, based on data values of the structure volume coverage representation. A data value may be assigned to the three-dimensional matrix based on the convex combination determined. The resultant three-dimensional matrix is used in a halftoning operation to control a structure distribution in the three-dimensional object.
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公开(公告)号：US10225438B2
公开(公告)日：2019-03-05
申请号：US15746751
申请日：2015-10-30
发明人： Peter Morovic , Jan Morovic , Jay S. Gondek
IPC分类号： H04N1/00 , B33Y50/00 , B33Y50/02 , G06K15/02 , H04N1/405 , B29C64/386 , B29C64/393
摘要： Certain examples described herein relate to the processing of object data corresponding to a three-dimensional object. First data corresponding to a first portion of the three-dimensional object and second data corresponding to a second portion of the three-dimensional object, separate from the first portion, are determined. The first data is halftoned using a first halftoning technique to generate control instructions for an apparatus to produce the first portion of the three-dimensional object. The second data is halftoned using a second halftoning technique to generate control instructions for the apparatus to produce the second portion of the three-dimensional object.
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公开(公告)号：US10003719B2
公开(公告)日：2018-06-19
申请号：US15305251
申请日：2014-04-25
CPC分类号： H04N1/52 , H04N1/6008 , H04N1/6016 , H04N1/6019 , H04N1/603 , H04N1/6058
摘要： A method of color halftone processing is disclosed. A plurality of color mappings each provide a mapping from a color value in a color space to a set of Neugebauer Primary area coverage (NPac) values in an NPac space. An imaging metric is obtained for each NPac value in the set. An NPac value in the set is selected based on the imaging metric. The selected NPac value is used as an output NPac value in a combined color mapping for the color value.
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公开(公告)号：US09936104B2
公开(公告)日：2018-04-03
申请号：US15113531
申请日：2014-01-30
CPC分类号： H04N1/6055 , H04N1/0044 , H04N1/6008
摘要： Certain methods and systems are described to provide color modelling. This color modelling applies to halftone images. In one example, a correction parameter for a color model is determined by minimizing a distance metric between a set of estimated spectral reflectance values and a set of measured spectral reflectance values to generate a multi-dimensional correction parameter. This enables a color model to be used to map at least one Neugebauer Primary area coverage value to at least one spectral reflectance value.
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公开(公告)号：US20180022030A1
公开(公告)日：2018-01-25
申请号：US15546193
申请日：2015-04-24
发明人： Jan Morovic , Peter Morovic
IPC分类号： B29C64/386 , B33Y50/00
摘要： A method for setting properties of a three-dimensional object in an additive manufacturing process, e.g. 3D-Printing, in which data representing a three-dimensional object to be printed is obtained. The data comprises sub-volumes representing the three-dimensional object. The position of the sub-volumes in the three-dimensional object is identifyied by a positional pomponent, i.e. a location depth and an orientation angle. A characteristic for the three-dimensional object to be printed is identified or set by the user. The property data is set for individual sub-volumes to be used in printing the three-dimensional object based on the identified characteristic and positional component. The property data comprises material property data, structural property data and printing property data.
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公开(公告)号：US20180017957A1
公开(公告)日：2018-01-18
申请号：US15545709
申请日：2015-04-24
IPC分类号： G05B19/4099 , H04N1/405 , G06K15/02
CPC分类号： G05B19/4099 , B33Y50/00 , G05B2219/35134 , G05B2219/35497 , G05B2219/49007 , G06K15/1823 , H04N1/405 , H04N1/4052
摘要： 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.
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公开(公告)号：US20170324884A1
公开(公告)日：2017-11-09
申请号：US15520303
申请日：2014-10-30
发明人： Peter Morovic , Jan Morovic
CPC分类号： H04N1/6016 , G06F17/18 , G06K2009/487 , H04N1/6041
摘要： Examples of a method and a system for configuring an imaging system are described. These examples involve obtaining a random sample of area coverage representations and grouping these by an estimated color, such as a colorimetric value. In each group a selected area coverage representation is determined with respect to one or more imaging attributes. A color gamut based on the random sample and the selected area coverage representations are used to generate a color mapping from an input color space to an area coverage representation space for use by the imaging system.
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公开(公告)号：US20170213102A1
公开(公告)日：2017-07-27
申请号：US15328342
申请日：2014-07-29
发明人： Peter Morovic , Jan Morovic
CPC分类号： G06K9/4652 , H04N1/6008
摘要： Embodiments of the present invention provide a method of determining whether data exceeds a validity range of an operation, comprising dividing operation data indicative of a range of validity of the operation into a plurality of chunks, determining a partial convex hull for each of the plurality of chunks, determining a convex hull for the operation data based on the plurality of partial convex bulls, and determining whether the data exceeds the validity range of the operation data based on the convex hull.
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