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公开(公告)号：BR9504155A
公开(公告)日：1997-09-09
申请号：BR9504155
申请日：1995-09-25
Applicant: XEROX CORP
Inventor： KLASSEN R VICTOR , HARRINGTON STEVEN J
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公开(公告)号：DE69126647D1
公开(公告)日：1997-07-31
申请号：DE69126647
申请日：1991-08-29
Applicant: XEROX CORP
Inventor： HARRINGTON STEVEN J , KLASSEN R VICTOR
Abstract: Mapping of full-color images to highlight color images which provides excellent results for both pictorial image and presentation graphics applications is described. Shades and tints for each hue in the original full-color image are mapped to a corresponding triangle of colors in the plane of the highlight hue. The apex of the triangle result colors is varied within the triangle of possible result colors, according to hue. Differentiations in the result color for the fully-saturated cases is provided while preserving the relative saturation and lightness behavior. The triangle of result colors matches the triangle of possible colors when the original hue matches the highlight hue. Mappings are provided for printers using red as the highlight color, and also for printers using arbitrary highlight colors. The mappings preserve information important to the viewer while reducing dimensions of the color space. Different information can be preserved depending upon the particular application.
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公开(公告)号：DE68927152T2
公开(公告)日：1997-02-13
申请号：DE68927152
申请日：1989-11-28
Applicant: XEROX CORP
Inventor： HARRINGTON STEVEN J
Abstract: Simulated color imaging using gray level patterns produced from two differently colored materials by employing fine patterns of dots. The dots blend with the background and yield a gray or colored appearance when seen from a distance. The imaging process utilizes ink pattern designs in conjunction with registered two-color imaging to thereby form simulated color images. Digital information representing two sets of gray-level producing patterns, set A for color A and set B for color B, is electronically stored in computer memory. The patterns in set B are complementary to those of set A. An apparent or simulated color image is produced by overlaying, combining or juxtapositioning a pattern from set A with a complementary pattern from set B, the combined image being subsequently rendered visible using two different colorants. A gray level pattern is produced for each elemental area of an original image.
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公开(公告)号：GB2496248A
公开(公告)日：2013-05-08
申请号：GB201216425
申请日：2012-09-14
Applicant: XEROX CORP
Inventor： ROLLESTON ROBERT J , COTE ALAN T , SEMBOWER NEIL R , HARRINGTON STEVEN J , VALOBRA PASCAL , NATARAJAN AANAND , NEGINHAL MAHESH
Abstract: A system and method for a pre-print, three-dimensional virtual rendering of a print job is disclosed. A plurality of modular/pipelined architectural layers 220-250 are managed, operated, and organized by a controller. A print product definition 210 is provided to a job ticket adaptation layer 220 where it is transformed into a physical model 270. The physical model 270 is then transformed into a display model 280 via the product model layer. The display model 280 is transformed into a scene 290 that can be displayed on a graphical user interface (GUI) as a 3D virtual rendering by a rendering layer, where the rendering includes one or more binding elements to satisfy the print product definition. The binding elements may further include 3D binding models as well as 2D textures on 3D surfaces to simulate 3D models. The modularity further enables different product description formats to be supported by only altering the job ticket adaption layer, and that different graphics rendering engines can be supported by altering only the rendering layer. The binding elements and associated metadata define the type of print product binding, which the user may select via the GUI from a group consisting of: spiral binder, comb binder, plastic comb binder, wire comb binder, tape binder, glue binding, stitch, ring binder, paper clips and spring clips.
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公开(公告)号：DE69836171T2
公开(公告)日：2007-08-30
申请号：DE69836171
申请日：1998-06-23
Applicant: XEROX CORP
Inventor： HARRINGTON STEVEN J
Abstract: A vector error diffusion system (16,18) for quantizing pixel value in color images, which initially determines whether any pixel should be white or colored, and subsequently determines for a CMYK printer (20) whether the pixel should be a primary color, a secondary color or black.
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Patent Agency Ranking
公开(公告)号：DE69819608T2
公开(公告)日：2004-05-13
申请号：DE69819608
申请日：1998-05-07
Applicant: XEROX CORP
Inventor： HARRINGTON STEVEN J , KLASSEN VICTOR R
Abstract: In this proposal a method of multilevel halftoning is described that allows the definition of halftone patterns using more than two gray levels at a time. This feature can be employed to eliminate the texture contours produced when shades formed by a pattern of two levels blends into a shade formed by a single gray level. The method also gives control over the degree to which a given output gray level is used. This can be employed to limit ink coverage when certain levels require more ink to produce than do others. According to the method: initial pixel intensity ranges are obtained; the initial pixel intensity ranges are compared to at least two overlapping threshold arrays; and selection of enhanced pixel intensity levels are determined for halftone cells according to the comparison results of the initial pixel intensity ranges to at least two overlapping threshold arrays wherein the enhanced pixel intensity levels are a function of results from the comparison.
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公开(公告)号：CA2217935C
公开(公告)日：2003-05-06
申请号：CA2217935
申请日：1997-10-10
Applicant: XEROX CORP
Inventor： HARRINGTON STEVEN J
IPC: B41J5/30 , B41J21/00 , G03G21/00 , G06F3/12 , G06K15/02 , G06T11/60 , H04N1/60 , H04N1/56 , B41J2/525 , G06K15/00
Abstract: A document containing colored text is reproduced in a way to preserve the color intent if the reproduced document is copied on a black-and-white device. For small text, the fact that it is colored, is con veyed by reproducing it bold, and for medium size text, by reproducing it outlined. For large text, both the fact that it is colored and the color used can be conve yed by filling the interior of the characters with patterns that correspond dire ctly to the color.
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公开(公告)号：CA2384062A1
公开(公告)日：2002-11-07
申请号：CA2384062
申请日：2002-04-30
Applicant: XEROX CORP
Inventor： HARRINGTON STEVEN J
Abstract: A method for utilizing redundant color inks to improve image quality whi le minimizing any undesirable effects such as texture or graininess. The method comprises tessellating the available redundant color space as defined by the available redundant ink colorants into regions where the regions are arrange d so as to minimize the range of luminance variation found within the regions. Th e result is perceived by the eye as less grainy in texture as well as much mor e pleasing to the eye.
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公开(公告)号：DE69426367T2
公开(公告)日：2001-05-17
申请号：DE69426367
申请日：1994-03-22
Applicant: XEROX CORP
Inventor： HARRINGTON STEVEN J
Abstract: A method for calibrating a printer determines a tone reproduction curve for the printer. A plurality of bands (12,16,20,24,28,32,36,40,44,48,52) of different accurate gray level standards and a corresponding number of smoothly increasing sequences (14,18,22,26,30,34,38,42,46,50,54) of gray level specifications for the printer are printed adjacent to one another. Adjacent bands and sequences are compared, and a point along each band where the band appears equal to the adjacent gray level specification sequence is determined. The points are interpolated and the interpolated values are used to form a tone reproduction curve for the printer. The tone reproduction curve, representing the correspondence between the gray level specification of the printer and the actual gray levels produced by the printer, can then be used to calibrate the printer. The calibrating method can also be used for color printers.
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公开(公告)号：CA2154100C
公开(公告)日：2000-10-24
申请号：CA2154100
申请日：1995-07-18
Applicant: XEROX CORP
Inventor： HARRINGTON STEVEN J
Abstract: A contone reproduction method and apparatus converting an input set of contone signals to an output set of binary signals suitable for driving a selected output device, utilizing a screen cell defined by repetitions of a subcell based on a subcell matrix of threshold factors to which an offset is applied in accordance with the position of the repetition of the subcell in the screen cell to obtain threshold signals, and wherein the particular subcell matrix of thresholds is selected in accordance with the determined image characteristic.
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