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    Predicting depleted printing device colorant from color fading
    2.
    发明授权
    Predicting depleted printing device colorant from color fading 有权

    公开(公告)号：US10999452B2

    公开(公告)日：2021-05-04

    申请号：US16604154

    申请日：2018-01-25

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

    Inventor： Richard E Maggard ,  Mark Shaw ,  Katelyn Christene Morse ,  Jan Allebach ,  Zuguang Xiao ,  Shaoyuan Xu

    IPC: H04N1/00 ,  H04N1/60

    Abstract: Pixel blocks of a user-generated print job raster page are clustered into raster color clusters, and pixel blocks of a corresponding scanned page are clustered into scanned color clusters. For each raster color cluster, if a color difference between the cluster and a corresponding scanned color cluster is greater than a threshold, color fading of the cluster is determined from simulated depletion of each colorant of a printing device, and a likely depleted colorant is determined based on the corresponding scanned color cluster and the determined color fading. A most likely depleted colorant is determined from the likely depleted colorant predicted for each raster color cluster for which the determined color difference is greater than the threshold.

    Corrective data for a reconstructed table
    3.
    发明授权
    Corrective data for a reconstructed table 有权

    公开(公告)号：US10893171B2

    公开(公告)日：2021-01-12

    申请号：US16650740

    申请日：2017-10-10

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

    Inventor： Mark Shaw

    IPC: H04N1/60

    Abstract: The present application includes devices and methods for using corrective data for a reconstructed table. In some examples, a computing device can generate a key from a reconstructed table, determine corrective data for the reconstructed table based on the generated key, and implement the corrective data to the reconstructed table to generate an updated table.

    ADAPTIVE SAMPLING
    4.
    发明申请
    ADAPTIVE SAMPLING 审中-公开

    公开(公告)号：US20200369041A1

    公开(公告)日：2020-11-26

    申请号：US16764071

    申请日：2017-12-01

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

    Inventor： Mark Shaw ,  Mark Wibbels

    IPC: B41J2/21 ,  B41J29/393 ,  B41J29/19 ,  B41J2/125

    Abstract: In one example, a printer with adaptive sampling includes a print engine, a monochrome scanner, a light source, and an analysis module. The light source has independently controlled primaries oriented to illuminate a media from the print engine. The analysis module includes a page selection module to select a chosen page of media for analysis, a heuristic analysis module to analyze the chosen page and determine a region of the page for analysis, a light control module to select a mono-color for the light source in region on the chosen page, and a quality module to accept an image of the chosen page and a scan of the chosen page with the monochrome scanner illuminated by the selected mono-color and compare the image and the scan within the region to determine a discrepancy.

    COVERT DOT PATTERNS
    7.
    发明申请
    COVERT DOT PATTERNS 有权

    公开(公告)号：US20210374492A1

    公开(公告)日：2021-12-02

    申请号：US17048031

    申请日：2018-08-01

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

    Inventor： Mark Shaw ,  Bradley R Larson

    IPC: G06K15/02

    Abstract: Examples described herein relate to a system consistent with the disclosure. For instance, the system may comprise a printing device including hardware to form markings on a print medium, a memory resource, and a controller to receive a print job to form the markings on the print medium, render a page description language of the print job to form the markings, determine an object type image of the print job, designate pixels of the determined object type image to form a covert dot pattern on the image, and adjust colors of the designated pixels to form the covert dot pattern on the markings.

    PRINT QUALITY DIAGNOSIS
    8.
    发明申请
    PRINT QUALITY DIAGNOSIS 审中-公开

    公开(公告)号：US20200084320A1

    公开(公告)日：2020-03-12

    申请号：US16462708

    申请日：2017-01-25

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

    Inventor： Zuguang Xiao ,  Richard E Maggard ,  Amy Reibman ,  Mark Shaw ,  Jan Allebach

    IPC: H04N1/00 ,  H04N1/407 ,  H04N1/047

    Abstract: In some examples, print quality diagnosis may include aligning corresponding characters between a scanned image of a printed physical medium aligned to a master image associated with generation of the printed physical medium to generate a common mask. Print quality diagnosis may further include determining, for each character of the scanned image, an average value associated with pixels within the common mask, and determining, for each corresponding character of the master image, the average value associated with pixels within the common mask. Further, print quality diagnosis may include determining, for each character of the common mask, a metric between the average values associated with the corresponding characters in the scanned and master images.

    Exposure adjustment factor
    9.
    发明授权
    Exposure adjustment factor 有权

    公开(公告)号：US10534284B2

    公开(公告)日：2020-01-14

    申请号：US15570991

    申请日：2015-07-30

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

    Inventor： Mark Hirst ,  Brad Larson ,  Mark Shaw

    IPC: G03G15/04 ,  G03G15/043 ,  G03G15/045

    Abstract: An electrophotographic imager includes a photoconductive element, a charger, and a light source to expose areas of a charged surface of the photoconductive element to form a latent image. A development element is coupled relative to the photoconductive element to develop, via charged marking agent, the latent image on the photoconductive element. An exposure adjustment factor is selectively applied, prior to the exposing, to a first printable area of the latent image.

    GENERATION OF IMAGES AT LOWER RESOLUTION
    10.
    发明申请
    GENERATION OF IMAGES AT LOWER RESOLUTION 审中-公开

    公开(公告)号：US20190045081A1

    公开(公告)日：2019-02-07

    申请号：US16155217

    申请日：2018-10-09

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

    Inventor： Mark Shaw

    IPC: H04N1/393 ,  G06T3/40

    CPC classification number: H04N1/3935 ,  G06T3/40

    Abstract: Examples include acquisition of an input image, generation of a first output pixel and a second output pixel based on a first set and a second set of input pixels, selective reassigning of a gray value of at least one of the first and second output pixels, and generation of an output image based on the output pixels at a second resolution lower than the first resolution.

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