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公开(公告)号：US11102376B2
公开(公告)日：2021-08-24
申请号：US16458479
申请日：2019-07-01
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Robert Ulichney , Matthew D. Gaubatz , Stephen Pollard
Abstract: An example system in accordance with an aspect of the present disclosure includes a halftone engine and a gray value engine. The halftone engine is to apply halftoning to an image recursively across a plurality of levels of image scales and spatial resolutions, to generate a pattern that is at least quasi-periodic across the plurality of levels. The gray value engine is to substitute gray values recursively for at least a portion of the halftoning.
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公开(公告)号：US11085761B2
公开(公告)日：2021-08-10
申请号：US16613819
申请日：2017-10-30
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Alper Oktar , Stephen Pollard , Guy Adams
IPC: G01B11/25
Abstract: A system for determining the surface structure of an object, the system comprising a first assembly including an illumination source, and a binary mask to generate a binary pattern, the binary mask disposed between the illumination source and a defocusing element to modify the binary pattern to provide a continuously modulated fringe pattern to illuminate the surface of the object.
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公开(公告)号：US20200263979A1
公开(公告)日：2020-08-20
申请号：US16613819
申请日：2017-10-30
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Alper Oktar , Stephen Pollard , Guy Adams
IPC: G01B11/25
Abstract: A system for determining the surface structure of an object, the system comprising a first assembly including an illumination source, and a binary mask to generate a binary pattern, the binary mask disposed between the illumination source and a defocusing element to modify the binary pattern to provide a continuously modulated fringe pattern to illuminate the surface of the object.
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公开(公告)号：US20200051277A1
公开(公告)日：2020-02-13
申请号：US16471081
申请日：2017-04-26
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Faisal Azhar , Stephen Pollard , Guy Adams , Steven J. Simske
IPC: G06T7/73 , B29C64/205 , B29C64/393 , G06K9/32
Abstract: A method is disclosed. The method comprises defining a region of interest on a three-dimensional model of an object. The method may comprise capturing an image of an object manufactured according to the three-dimensional model. The method may comprise determining, using a processor, a position and orientation of the three-dimensional model with respect to the object in the captured image. The method may comprise locating the region of interest on the manufactured object. A portion of the manufactured object within the region of interest may comprise an identifiable feature. An apparatus and a machine-readable medium are also disclosed.
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公开(公告)号：US10395389B2
公开(公告)日：2019-08-27
申请号：US15096121
申请日：2016-04-11
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Stephen Pollard
Abstract: A computing system includes a projector, a camera, a calibration target, and a processor. The calibration target has known dimensions and four corners in a fixed position relative to both the projector and the camera. The processor causes the projector to project a calibration image having four corners and a repetitive pattern. The processor further causes the camera to capture a captured image of the calibration image and determine a rotation and translation that brings the four corners of the captured image into correspondence with the four corners of the calibration target and identify internal corner points of the repetitive pattern. The processor further selects an intrinsic parameter value and calibrates a 3D coordinate system of at least one of the camera and the projector to the calibration target using the selected intrinsic parameter value, the rotation and translation, and the internal corner points.
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Patent Agency Ranking
公开(公告)号：US10223800B2
公开(公告)日：2019-03-05
申请号：US15300074
申请日：2014-03-28
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Robert Ulichney , Matthew D Gaubatz , Stephen Pollard
Abstract: Examples disclosed herein relate to determining the presence of quasi-periodic two-dimensional object. In one implementation, a processor determines peak points of a DFT of an image where the peak points are points with a value above a threshold relative to surrounding points. The processor may then output information indicating the existence of a quasi-periodic two-dimensional object within the image based on the peak points.
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公开(公告)号：US10002438B2
公开(公告)日：2018-06-19
申请号：US15327959
申请日：2014-07-22
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Stephen Pollard , Robert Ulichney , Matthew D Gaubatz
CPC classification number: G06T7/37 , G06T2201/0051 , G06T2207/10004 , G06T2207/20024 , G06T2207/20056 , H04N1/4055
Abstract: An example method of rapid image registration includes recovering an affine transform of a quasi-periodic object based on peak locations of Discrete Fourier Transform (DFT) in a captured image. The example method also includes filtering a region of the captured image to match a filtered version of a reference image including the quasi periodic object. The example method also includes recovering translation parameters to reduce image differences between the reference image and the captured image for a subset of the image locations of the filtered image and outputting an approximate transform including translation.
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公开(公告)号：US09977999B2
公开(公告)日：2018-05-22
申请号：US15110027
申请日：2014-01-06
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Hossein Malekmohamadi , Guy Adams , Stephen Pollard , Steven J. Simske , Khemraj Emrith , Melvyn Smith , Lyndon Smith
CPC classification number: G06K9/6277 , G06T7/0004 , G06T7/41 , G06T7/593 , G06T2207/10012 , G06T2207/10021 , G06T2207/10152 , G06T2207/20076 , G06T2207/20081 , G06T2207/20084 , G06T2207/30124 , H04N1/2323
Abstract: Examples disclosed herein relate to classifying paper based on three-dimensional characteristics of the paper. For example, a representation of the three-dimensional characteristics of the paper may be created, and statistical summary information related to the three-dimensional characteristics of the paper may be determined based on the representation. The paper may be classified based on the statistical summary information.
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公开(公告)号：US20180013921A1
公开(公告)日：2018-01-11
申请号：US15545712
申请日：2015-02-27
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Robert Ulichney , Matthew D Gaubatz , Stephen Pollard
CPC classification number: H04N1/4055 , H04N1/52 , H04N1/6022 , H04N2201/0082
Abstract: An example system in accordance with an aspect of the present disclosure includes a halftone engine and a gray value engine. The halftone engine is to apply halftoning to an image recursively across a plurality of levels of image scales and spatial resolutions, to generate a pattern that is at least quasi-periodic across the plurality of levels. The gray value engine is to substitute gray values recursively for at least a portion of the halftoning.
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公开(公告)号：US20170132800A1
公开(公告)日：2017-05-11
申请号：US15300074
申请日：2014-03-28
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Robert Ulichney , Matthew D. Gaubatz , Stephen Pollard
CPC classification number: G06T7/42 , G06K9/522 , G06K9/6202 , G06T7/11 , G06T2207/20056
Abstract: Examples disclosed herein relate to determining the presence of quasi-periodic two-dimensional object. In one implementation, a processor determines peak points of a DFT of an image where the peak points are points with a value above a threshold relative to surrounding points. The processor may then output information indicating the existence of a quasi-periodic two-dimensional object within the image based on the peak points.
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