公开(公告)号：US10220631B2

公开(公告)日：2019-03-05

申请号：US15329045

申请日：2014-08-19

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

Inventor： Stephen J. Nichols ,  Jay S. Gondek ,  Jefferson P. Ward

IPC: B41J2/175

Abstract: A transform wrapper is stored on a memory device and the memory device may be included in a printer cartridge. The transform wrapper may dynamically build a transform map for a printer based on metadata stored at the memory device. The metadata may indicate at least one of a type of depositing material, transform map, print media and printer.

公开(公告)号：US20170302824A1

公开(公告)日：2017-10-19

申请号：US15641544

申请日：2017-07-05

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

Inventor： Jay S. Gondek ,  Stephen J. Nichols ,  Jefferson P. Ward

IPC: H04N1/60 ,  G03G15/08 ,  G06K15/02 ,  H04N1/00

CPC classification number: H04N1/6019 ,  G03G15/0863 ,  G06K15/02 ,  H04N1/00538

Abstract: A printer cartridge includes a memory device and at least one compressed color table stored on the memory device. A compressed color table includes a losslessly compressed neutral axis, a number of nodes that correspond to seed color table nodes and a number of delta nodes that correspond to a number of delta tables. The number of delta tables indicate differences between interpolated color table nodes and corresponding actual color table nodes.

公开(公告)号：US20210271941A1

公开(公告)日：2021-09-02

申请号：US17256405

申请日：2018-10-31

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

Inventor： Jay S. Gondek ,  Jason M. Quintana ,  Milan Crowley Justel

IPC: G06K15/02

Abstract: In some examples, luminance-biased sharpening for thermal media printing may include converting an input image to a grayscale luminance representation. For each pixel of a plurality of specified pixels of the converted input image, a sharpening lightness value may be determined. Further, a ratio of the sharpening lightness value to a corresponding original lightness value may be determined. A resulting sharpened pixel may be determined by applying a corresponding value of the determined ratio to each of the specified pixels. A dark correction factor may be applied to the resulting sharpened pixels that are darkened and a light correction factor may be applied to the resulting sharpened pixels that are lightened. Based on application of the dark correction factor and the light correction factor, a sharpened output image corresponding to the input image may be generated.

公开(公告)号：US10885612B2

公开(公告)日：2021-01-05

申请号：US16176984

申请日：2018-10-31

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

Inventor： Jay S. Gondek ,  Jason M. Quintana ,  Milan Crowley Justel

IPC: G06T5/00 ,  H04N1/409 ,  H04N1/40

Abstract: In some examples, luminance-biased sharpening for thermal media printing may include converting an input image to a grayscale luminance representation. For each pixel of a plurality of specified pixels of the converted input image, a sharpening lightness value may be determined. Further, for each pixel of the plurality of specified pixels of the converted input image, a ratio of the sharpening lightness value to a corresponding original lightness value may be determined. Based on the determined ratio, a sharpened output image corresponding to the input image may be generated.

公开(公告)号：US20200267277A1

公开(公告)日：2020-08-20

申请号：US16604142

申请日：2017-11-10

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

Inventor： Jay S. Gondek

IPC: H04N1/32 ,  G06T5/00 ,  G06T5/50 ,  G06T1/00

Abstract: A device includes memory and a processor connected to the memory to execute instructions. The instructions are to determine luminance values of pixels of an original image and to determine chrominance values of pixels of a processed image obtained from performance of an image processing operation on the original image. The instructions are further to combine the luminance values of the pixels of the original image and the chrominance values of the pixels of the processed image to obtain a resultant image.

公开(公告)号：US10659656B2

公开(公告)日：2020-05-19

申请号：US16298790

申请日：2019-03-11

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

Inventor： Peter Morovic ,  Jan Morovic ,  Jay S. Gondek

IPC: H04N1/405 ,  B33Y50/00 ,  B29C64/386 ,  B29C64/165 ,  B29C64/112

Abstract: According to examples, area coverage vectors for each pixel on each slice of a digital representation of an object may be determined and a two-dimensional halftone matrix including threshold values may be subdivided into a plurality of sub-matrices, each sub-matrix including threshold values of the halftone matrix in a respective value sub-range. In addition, for each of the slices, a sub-matrix of the plurality of sub-matrices may be selected and the area coverage vectors for the pixels in the slice may be halftoned using respective threshold values of the selected sub-matrix.

公开(公告)号：US10412269B2

公开(公告)日：2019-09-10

申请号：US16008299

申请日：2018-06-14

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

Inventor： Jay S. Gondek ,  Stephen J. Nichols ,  Jefferson P. Ward

IPC: H04N1/60 ,  B41J2/175 ,  G06K15/02 ,  G03G15/08 ,  G03G21/18

Abstract: In one example in accordance with the present disclosure a printer cartridge and memory device containing a representation of a compressed multi-dimensional color table is described. The color table includes at least one low dimensional portion of the multi-dimensional color table storing color transformation information at a first resolution and a number of remaining portions of the multi-dimensional color table storing color transformation information at a second resolution. In the color table, the first resolution is greater than the second resolution and the at least one compressed multi-dimensional color table is to generate a high resolution uncompressed multi-dimensional color table the high resolution being at least as great as the first resolution.

公开(公告)号：US10306111B2

公开(公告)日：2019-05-28

申请号：US15986915

申请日：2018-05-23

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  PURDUE RESEARCH FOUNDATION

Inventor： Chuohao Tang ,  Sean Michael Collison ,  Amy Ruth Reibman ,  Mark Q. Shaw ,  Jan P. Allebach ,  Jay S. Gondek

IPC: B41J2/175 ,  H04N1/60 ,  H04N1/64 ,  H04N1/41 ,  H04N1/00

Abstract: In some examples, a print cartridge includes a memory device comprising quantized coefficients derived from a lossy compression, at a selected step size, of a difference color table including a plurality of difference nodes in which each difference node represents a difference value that is a difference of a value of a node of a color table and a value of a corresponding node of a reference table, the quantized coefficients useable to produce a reconstructed difference color table including a first set of difference nodes each representing a difference value that is within an error threshold at the selected step size, and a second set of difference nodes each representing a difference value that is outside an error threshold at the selected step size. The memory device further comprises corrective information to correct the second set of difference nodes of the reconstructed difference color table.

公开(公告)号：US20190143703A1

公开(公告)日：2019-05-16

申请号：US16243701

申请日：2019-01-09

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

Inventor： Stephen J. Nichols ,  Jay S. Gondek ,  Jefferson P. Ward

IPC: B41J2/175 ,  H04N1/60 ,  G06K15/02 ,  G03G21/18 ,  G03G15/08

Abstract: A transform wrapper is stored on a memory device and the memory device may be included in a printer cartridge. The transform wrapper may dynamically build a transform map for a printer based on metadata stored at the memory device. The metadata may indicate at least one of a type of depositing material, transform map, print media and printer.

公开(公告)号：US20180013929A1

公开(公告)日：2018-01-11

申请号：US15611462

申请日：2017-06-01

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  PURDUE RESEARCH FOUNDATION

Inventor： Chuohao Tang ,  Sean Michael Collison ,  Amy Ruth Reibman ,  Mark Q. Shaw ,  Jan P. Allebach ,  Jay S. Gondek

IPC: H04N1/64 ,  B41J2/175 ,  H04N1/60

Abstract: In some examples, a print cartridge includes a memory device comprising quantized coefficients derived from a lossy compression, at a selected step size, of a difference color table including a plurality of difference nodes in which each difference node represents a difference value that is a difference of a value of a node of a color table and a value of a corresponding node of a reference table, the quantized coefficients useable to produce a reconstructed difference color table including a first set of difference nodes each representing a difference value that is within an error threshold at the selected step size, and a second set of difference nodes each representing a difference value that is outside an error threshold at the selected step size. The memory device further comprises corrective information to correct the second set of difference nodes of the reconstructed difference color table.