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| Number | Title | Issue Date |
| 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 |
| 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 |
| 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 |
| 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 |