| Patent Number |
Title Of Patent |
Date Issued |
| 7562956 |
Image printing using print quality enhancing ink |
July 21, 2009 |
| Image quality is improved by adjusting the ejection amount of quality enhancing ink based on the ejection amount of colored ink containing colorant. When a relatively high gross printing medium is used, the quality enhancing ink is ejected in an image area where virtually no colored |
| 7552988 |
Determination of the combination of ink amount for realizing the specified colors |
June 30, 2009 |
| For correlating the specified colors and ink amount, the specified color data showing the color values of the specified colors are acquired, the ink amount data showing optional ink amount are converted into color values, evaluation index including the first evaluation index for eval |
| 7549717 |
Reduction of dependence of color appearance on light source |
June 23, 2009 |
| A look up table LUT with specific gray reproduction characteristics is used for converting RGB image data to multi-tone data of ink colors. The gray reproduction characteristics of LUT are set such that the color difference .DELTA.E of a gray color area with an arbitrary tone level in |
| 7466448 |
Color separation into plural ink components including primary color ink and spot color ink |
December 16, 2008 |
| An ink set that includes a plurality of chromatic primary color inks that can reproduce achromatic color in combination with each other and at least one spot color ink having a hue different from any of the chromatic primary color inks is prepared. A color to be reproduced on a printing |
| 7436543 |
Color separation based on ink characteristics |
October 14, 2008 |
| The ratio of ink quantities for reproducing achromatic color by a mixture of primary color inks is termed primary color mixture ratio. A primary coloring factors correlated to the primary color mixture ratio is established for each primary color ink. The ratio of each ink quantity is |
| 7237866 |
Image printing using print quality enhancing ink |
July 3, 2007 |
| Image quality is improved by adjusting the ejection amount of quality enhancing ink based on the ejection amount of colored ink containing colorant. When a relatively high gross printing medium is used, the quality enhancing ink is ejected in an image area where virtually no colored |
| 7234793 |
Image printing using print quality enhancing ink |
June 26, 2007 |
| Image quality is improved by adjusting the ejection amount of quality enhancing ink based on the ejection amount of colored ink containing colorant. When a relatively high gross printing medium is used, the quality enhancing ink is ejected in an image area where virtually no colored |
| 6863374 |
Image printing using print quality enhancing ink |
March 8, 2005 |
| Image quality is improved by adjusting the ejection amount of quality enhancing ink based on the ejection amount of colored ink containing colorant. When a relatively high gross printing medium is used, the quality enhancing ink is ejected in an image area where virtually no colored |
| 6851794 |
Reduction of dependence of color appearance on light source |
February 8, 2005 |
| A look up table LUT with specific gray reproduction characteristics is used for converting RGB image data to multi-tone data of ink colors. The gray reproduction characteristics of LUT are set such that the color difference .DELTA.E of a gray color area with an arbitrary tone level in th |
| 6637861 |
Reduction of dependence of color appearance on light source |
October 28, 2003 |
| A look up table LUT with specific gray reproduction characteristics is used for converting RGB image data to multi-tone data of ink colors. The gray reproduction characteristics of LUT are set such that the color difference .DELTA.E of a gray color area with an arbitrary tone level in th |
| 6341833 |
Print control apparatus, printing apparatus, print control method, printing method, recording me |
January 29, 2002 |
| First, image data are converted to first tone data for primary color inks, and then converted to second tone data for primary color and black inks, by under color elimination. The combinations of the above tone data for primary color and black inks, in which bronzing occurs when images a |
