公开(公告)号：US20200177768A1

公开(公告)日：2020-06-04

申请号：US16616461

申请日：2017-07-24

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

Inventor： Peter MOROVIC ,  Jan MOROVIC ,  Jordi ARNABAT BENEDICTO ,  Javier MAESTRO GARCIA

IPC: H04N1/60 ,  G06T1/20 ,  H04N1/00

Abstract: Methods for printer color calibration are disclosed. A nominal Neugebauer Primary area coverage (NPac) vector from an NPac space is then determined from a color mapping, the nominal NPac vector corresponding to a given color value in a color space. One or more colorant calibration factors each associated with a color of colorant are received; the calibration factors representing operational characteristics of the printer. One or more optimization metrics for constraining desired properties of an objective calibrated NPac vector to be generated are also received. The calibrated NPac vector is generated based on the nominal NPac vector such that: the generated calibrated NPac vector is convex; and for each given color of colorant the usage of colorant associated with the generated calibrated NPac vector is equal to the product of usage of colorant associated with the nominal NPac vector; and the calibration factor for the given color of colorant.

公开(公告)号：US20220400187A1

公开(公告)日：2022-12-15

申请号：US17770227

申请日：2020-01-24

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

Inventor： Jordi ARNABAT BENEDICTO ,  Jan MOROVIC ,  Peter MOROVIC

IPC: H04N1/60

Abstract: Disclosed is a non-transitory computer readable storage medium, a computer-implemented method and an imaging color profile of an imaging apparatus. A processor retrieves the color profile of the imaging apparatus from data storage, the color profile comprising a first plurality of associations between a first plurality of color values in a first color space and a second plurality of color values in a second color space. The processor receives input data indicating a determined association, the determined association being an association between a first determined color value in the first color space and a second determined color value in the second color space. The processor performs an update process to update the first plurality of associations, the update process comprising performing an interpolation process using the determined association and an association of the first plurality of associations.

公开(公告)号：US20160105589A1

公开(公告)日：2016-04-14

申请号：US14763506

申请日：2013-01-29

Applicant: Jordi ARNABAT BENEDICTO ,  Marti MARIA ,  Laura Alicia CLEMENTE ,  HEWLETT-PACKARD DEVELOPMENT COMPANY L.P.

Inventor： Jordi ARNABAT BENEDICTO ,  Marti Maria Saguer ,  Laura Alicia Clemente Gomez

IPC: H04N1/60 ,  G06K15/02

CPC classification number: H04N1/6019 ,  G06K15/1878 ,  H04N1/6058

Abstract: A method of preparing the rendering with a color output device of at least one object, the method comprising—computing a first output color profile of a first color model, said profile mimicking, for the human eye, a second output color profile of a second color model, said first output color profile being used in a description of said at least one object in a page description language, and the second output color profile being the output device profile,—and converting colors of pixels of the representation of the at least one object obtained by application of a rendering engine to said description, from the first output color profile to the second output color profile.

Abstract translation: 一种使用至少一个对象的彩色输出装置准备渲染的方法，所述方法包括 - 计算第一颜色模型的第一输出颜色特征图，所述轮廓模拟人眼对第二颜色模型的第二输出颜色分布 所述第一输出颜色配置文件用于以页面描述语言对所述至少一个对象的描述，并且所述第二输出颜色配置文件是所述输出设备配置文件，并且将所述至少一个表示的像素的颜色转换为至少 通过将渲染引擎应用于所述描述而获得的一个对象从第一输出颜色配置文件到第二输出颜色配置文件。

公开(公告)号：US20210134017A1

公开(公告)日：2021-05-06

申请号：US16468457

申请日：2017-03-22

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

Inventor： Jordi ARNABAT BENEDICTO ,  Jordi VILAR BENITO

IPC: G06T9/00 ,  H03M7/30 ,  H03M7/46

Abstract: Methods of image compression are described. A stream of color image data is filtered with a prediction routine using a pixel neighborhood. The filtered stream of color image data is sorted with a block sorting routing. A version of the color image data is compressed based on the sorted and filtered stream of color image data.

公开(公告)号：US20190193441A1

公开(公告)日：2019-06-27

申请号：US16326818

申请日：2016-10-21

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

Inventor： Peter MOROVIC ,  Jan MOROVIC ,  Jordi ARNABAT BENEDICTO ,  Hector GOMEZ MINANO

IPC: B41J29/393 ,  B41J2/195 ,  B41J2/21 ,  G06K15/02

CPC classification number: B41J29/393 ,  B41J2/195 ,  B41J2/2146 ,  B41J2029/3935 ,  G06K15/027

Abstract: An apparatus and method for use in generating calibration parameters for a printing apparatus comprising a plurality of print modules are disclosed. The method comprises printing a first plurality of test patches for each print module of the plurality of print modules, analysing the first plurality of test patches to identify at least two clusters of print modules, wherein each cluster comprises a sub-group of print modules having substantially similar performance, printing a second plurality of test patches comprising an extended calibration test patch set for each cluster of print modules, the second plurality of test patches being distributed across the print modules of the cluster, and analysing extended calibration test patch set for each cluster to determine a calibration parameter for the printing apparatus.