Inventor: Meng Yao

Address: West Linn, OR
No. of patents: 21
Last patent issue date: 03/22/2011

Number	Title	Issue Date
7911479	Gamut mapping A mapping technique is disclosed that maps color image data of an image displayed on a first image display device to output color image data for display on a second image display device. This mapping technique maps the color gamut of the first image display device t...	03/22/2011
7880930	Reducing printhead process color non-uniformities in a direct marking device What is disclosed is a novel system and method for reducing process color banding due to printhead non-uniformities in a direct marking device. In one example, a first measurement of a printhead spatial non-uniformity is obtained along a first line in a color space ...	02/01/2011
7717532	Systems and methods that improve fluid color output by using clear or white fluid An imaging system that forms an image on a receiving medium including a fluid ejector that ejects fluid onto the receiving medium and a controller that controls the fluid ejector to eject the fluid to include a non-white and non-clear fluid or one of at least white ...	05/18/2010
7684087	Bitmapped based trapping A bitmap based trapping method that extends the dot pattern of a lighter color into a darker color is disclosed. For selected pixels with the darker color and not the lighter color, correspondingly located pixels in neighboring halftone cells are identified. If any ...	03/23/2010
7576885	Balancing grays on color printers A gray balancing technique wherein color data values are modified only if the color data values include a gray component. ...	08/18/2009
7573609	Color printing A method of printing a pixel defined by C1, M1, Y1, K1 color values having a sum that is not less than a maximum allowed paper coverage max_cov, including obtaining an adjusted cyan color value Cadj that depends on C1 and K1...	08/11/2009
7573621	Color printing A method of printing a pixel defined by C, M, Y color values having a sum that is not less than a maximum allowed paper coverae max_cov, including assigning a maximum of the C, M, Y values to max_color; assigning a minimum of the C, M, Y values to min_color; selecti...	08/11/2009
7508558	Color printing A method of processing cyan, magenta, and yellow color values C1, M1, Y1 including transforming the C1, M1, Y1 color values to cyan, magenta, and yellow color values C, M, Y in such a manner that each of C, M, Y is not great...	03/24/2009
7502149	Color printing A method of printing a pixel defined by C, M, Y color values having a sum that is not less than a predetermined maximum value VMAX, including assigning a maximum of the C, M, Y values to max_color; assigning a minimum of the C, M, Y values to min_color; selecting a ...	03/10/2009
7499203	Color printing A method of printing a pixel defined by C1, M1, Y1, K1 color values having a sum that is not less than a predetermined maximum VMAX, including obtaining an adjusted cyan color value Cadj that depends on C1 and K1, an adjusted magenta color value Madj that depends on...	03/03/2009
7457015	Color printing A method of processing cyan, magenta and yellow color values including half-toning cyan and magenta colors values, and half-toning yellow color values in such a manner that yellow dots tend to be printed next to cyan, magenta or secondary color dots regardless of cy...	11/25/2008
7453591	Color saturation adjustment A method of gray balance adjustment and color saturation adjustment including generating respective gray balancing components for initial primary color data values, generating respective color saturation adjustment components for the initial primary color data value...	11/18/2008
7417766	Calibration of color devices A method of adjusting a non-black primary color value including determining first, second and third portions of the non-black primary color value; determining an adjusted first portion using a first one-dimensional look-up table, wherein the first portion is used as...	08/26/2008
7394566	Calibration of color devices A method of adjusting a non-black primary color value including determining first, second and third portions of the non-black primary color value; determining a first contribution using a first one-dimensional look-up table and the first portion, wherein the primary...	07/01/2008
7375849	Balancing grays on color printers A gray balancing technique wherein gray balancing curves are determined by interpolating the primary color data values of color samples to determine discrete combinations of primary colors that substantially match predetermined targets, and performing a curve fittin...	05/20/2008
7355753	Color saturation adjustment A method of adjusting primary color data values including producing color saturation adjusted primary color data values that depend on a relative amount of chroma in the initial primary color data values. ...	04/08/2008
7262885	Stochastic halftone screening method A method for halftoning a gray scale image to generate a halftoned image uses a stochastic screen is designed to provide visually pleasing, blue noise dot profiles when thresholded at any gray level and wherein substantially all the threshold values corresponding to...	08/28/2007
7199888	Method for enhanced black in draft mode A method of improving black print quality in a color printer having at least one color ink and black ink includes determining a location on a substrate where a black pixel is to be printed, printing a droplet of color ink at the location, and printing a droplet of b...	04/03/2007
7048349	Color printing A method of printing including replacing each of black dots of a first subset of black dots of a bit map for a predetermined area with a process black dot, adding a non-black dot to each of black dots of a second subset of black dots of the bit-mapped data, and prin...	05/23/2006
7040730	Color printing A method of printing including changing each process black dot and each black plus non-black dot of a halftoned bit map to a black dot, if each of first and second adjacent dots on either side of such process black dot or black plus dot along a predetermined axis co...	05/09/2006
6987588	Text and image quality enhancement A method to compensate for dot placement errors includes receiving image data comprising a plurality of pixels, each having at least two states, a first corresponding to depositing no ink and a second corresponding to depositing ink; identifying a stray pixel patter...	01/17/2006

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Inventor: Meng Yao