公开(公告)号：US11025798B2

公开(公告)日：2021-06-01

申请号：US16473752

申请日：2017-04-19

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

Inventor： Peter Morovic ,  Jan Morovic ,  Javier Maestro Garcia ,  Montserrat Solano Pallarol

IPC: H04N1/60

Abstract: A computing device receives first data indicating a first metric of a first printed test area and second data indicating a second metric of a second printed test area. The first printed test area is associated with a first plurality of Neugebauer Primaries and each Neugebauer Primary in the first plurality of Neugebauer Primaries is associated with a respective area coverage in the first printed test area. The second printed test area is associated with a second plurality of Neugebauer Primaries, wherein each Neugebauer Primary in the second plurality of Neugebauer Primaries is associated with a respective area coverage in the second printed test area and the second plurality of Neugebauer Primaries is different from the first plurality of Neugebauer Primaries. The computing device generates third data associating a color in a color space with the first plurality of Neugebauer Primaries or the second plurality of Neugebauer Primaries in dependence on the first metric and the second metric.

公开(公告)号：US20190297225A1

公开(公告)日：2019-09-26

申请号：US16302616

申请日：2016-09-30

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

Inventor： Javier Maestro Garcia ,  Peter Morovic ,  Jan Morovic

IPC: H04N1/52 ,  H04N1/60 ,  H04N1/64

Abstract: A method of generating a set of halftone parameters. The method comprises assigning a first set of halftone parameters to a first location in a color space, the first location in the color space corresponding to a first color, and assigning a second set of halftone parameters to a second location in the color space, the second location in the color space corresponding to a second color. An interpolating between the first set of halftone parameters and the second set of halftone parameters is performed, based on the first location and the second location, to determine a third set of halftone parameters corresponding to a third location in the color space. The result of the interpolation is output data associating the third set of halftone parameters with a third color corresponding to the third location in the color space. The first set of halftone parameters may represent a relative area coverage of a first colorant combination and the second set of halftone parameters may represent a relative area coverage of a second colorant combination.

公开(公告)号：US20190116291A1

公开(公告)日：2019-04-18

申请号：US16088897

申请日：2016-04-22

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

Inventor： Javier Maestro Garcia ,  Jan Morovic ,  Peter Morovic

IPC: H04N1/52 ,  G09G3/20 ,  G06K9/62 ,  G06K9/46

Abstract: From a statistical distribution of different color states in an image subdivided in pixels, pixel color states are selected by performing comparisons between predetermined values and values associated to per-pixel state probabilities. Errors (based on drifts between selected color states and per-pixel state probabilities) are diffused to per-pixel state probabilities of subsequent pixels.