公开(公告)号：US20180270396A1

公开(公告)日：2018-09-20

申请号：US15459611

申请日：2017-03-15

Applicant: Xerox Corporation

Inventor： ARINDAM DAS ,  RANITA BEJ ,  GUO-YAU LIN

IPC: H04N1/60 ,  G06K15/02 ,  G06F3/12

CPC classification number: H04N1/6008 ,  G06F3/1298 ,  G06K15/02 ,  H04N1/6038 ,  H04N2201/0094

Abstract: According to exemplary methods, a processor of a printing device determines color values out of a first colorant combination using marking materials for standard colorants and marking materials for one or more extended gamut colors. The extended gamut color has colorants other than the standard colorants. Responsive to the first colorant combination including color values for each of a pair of two complementary colors, the processor calculates a second colorant combination that produces the same human-perceivable color as the first colorant combination. The second colorant combination includes only one color of the pair of two complementary colors. The printing device produces output using the second colorant combination for the standard colorants and the extended gamut color.

公开(公告)号：US20180332195A1

公开(公告)日：2018-11-15

申请号：US15593548

申请日：2017-05-12

Applicant: Xerox Corporation

Inventor： ARINDAM DAS ,  DAVID C. ROBINSON

IPC: H04N1/60

CPC classification number: H04N1/6097 ,  H04N1/54 ,  H04N1/6008 ,  H04N1/603 ,  H04N2201/0082

Abstract: According to exemplary methods, a print job is received into a computerized device. The computerized device includes a marking device having a programmed color space. The print job includes an electronic document and print job attributes with a spot color for use in rendering the print job. Raster processing of the electronic document is performed. An object in the electronic document involving the spot color is identified. Definition of the spot color is verified for the marking device. Responsive to the spot color not being defined for the marking device, color values for each pixel in the object are modified to zero. Overprint is enabled for the object so that underlying objects will show through.