公开(公告)号：US20210110221A1

公开(公告)日：2021-04-15

申请号：US16978469

申请日：2018-04-09

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

Inventor： Marta Blanch Pinol ,  Cristina Crespi Argemi ,  Sara Echevarria Benito

IPC: G06K15/02 ,  G06K15/00 ,  B41M5/00 ,  B41J2/21

Abstract: There is provided a method for rendering an image according to selected image quality attributes. Two or more image quality attributes are selected from a plurality of attributes of the image. A set of pigments for an area of the image and a density for each pixel of the area are determined. A quantity of pretreatment for deposition onto a print target is determined, where the pretreatment quantity is dependent on the pigments, the density, and the selected image quality attributes.

公开(公告)号：US11123991B2

公开(公告)日：2021-09-21

申请号：US16305110

申请日：2016-07-28

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

Inventor： Antonio Gracia Verdugo ,  Diana Pilar Pascual Soldevilla ,  Sara Echevarria Benito ,  David Toussaint ,  Mauricio Seras Franzoso

IPC: B41J2/165 ,  B41J2/125

Abstract: In an example, a method includes ejecting a print agent drop from a printhead, and determining an indication of velocity of the print agent drop. A weight parameter of the print agent drop may be determined from the indication of velocity.

公开(公告)号：US11755862B2

公开(公告)日：2023-09-12

申请号：US16978469

申请日：2018-04-09

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

Inventor： Marta Blanch Pinol ,  Cristina Crespi Argemi ,  Sara Echevarria Benito

IPC: G06K15/02 ,  B41J2/21 ,  B41M5/00 ,  G06K15/00 ,  B41J2/205

CPC classification number: G06K15/1823 ,  B41J2/2114 ,  B41J2/2121 ,  B41J2/2132 ,  B41M5/0017 ,  G06K15/407 ,  B41J2/2054 ,  B41J2002/2058

Abstract: There is provided a method for rendering an image according to selected image quality attributes. Two or more image quality attributes are selected from a plurality of attributes of the image. A set of pigments for an area of the image and a density for each pixel of the area are determined. A quantity of pretreatment for deposition onto a print target is determined, where the pretreatment quantity is dependent on the pigments, the density, and the selected image quality attributes.

公开(公告)号：US11945225B2

公开(公告)日：2024-04-02

申请号：US17778359

申请日：2019-11-22

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

Inventor： Sara Echevarria Benito ,  Ruben Recasens Oros ,  Alexandre Rodriguez Llofriu

IPC: B41J2/21 ,  B41J2/17 ,  H04N1/405

CPC classification number: B41J2/17 ,  B41J2/2114 ,  H04N1/405

Abstract: A method is disclosed. The method comprises receiving a matrix representation of a source image to be printed, the matrix representation defining a colorant value for each of a plurality of print addressable locations, wherein the colorant values are representative of amounts of print colorant to be delivered to the print addressable locations during a printing operation. The method may comprise identifying, by processing circuitry, a region in the matrix representation having a first print addressable location and an adjacent second print addressable location, wherein a difference between colorant values of the first print addressable location and the second print addressable location meets or exceeds a defined colorant value threshold. The method may comprise determining, by processing circuitry, an amount of treatment fluid to be delivered to each of the plurality of print addressable locations during the printing operation, wherein an amount of treatment fluid to be delivered in the identified region is determined to be greater than an amount of treatment fluid to be delivered to adjacent print addressable locations having colorant values which differ by less than the defined colorant value threshold. An apparatus and a machine-readable medium are also disclosed.

公开(公告)号：US20200324550A1

公开(公告)日：2020-10-15

申请号：US16305110

申请日：2016-07-28

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

Inventor： Antonio Gracia Verdugo ,  Diana Pilar Pascual Soldevilla ,  Sara Echevarria Benito ,  David Toussaint ,  Mauricio Seras Franzoso

IPC: B41J2/165 ,  B41J2/125

Abstract: In an example, a method includes ejecting a print agent drop from a printhead, and determining an indication of velocity of the print agent drop. A weight parameter of the print agent drop may be determined from the indication of velocity.