Issued Patents All Time
Showing 51–75 of 75 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6977679 | Camera meta-data for content categorization | Daniel R. Tretter | 2005-12-20 |
| 6829063 | Method for designing sets of color matrices that tile together | Jan P. Allebach | 2004-12-07 |
| 6791718 | Halftone printing with dither matrices generated by using cluster filters | Jan P. Allebach | 2004-09-14 |
| 6778299 | Error diffusion with partial dots method and system | Daniel R. Tretter, Jian Fan, Clayton Brian Atkins | 2004-08-17 |
| 6760126 | Adaptive halftoning method and apparatus | Kong Kritayakirana, Daniel R. Tretter | 2004-07-06 |
| 6724501 | Apparatus and method for dither matrix design for color halftoning using dispersed dot clusters | Clayton Brian Atkins, Daniel R. Tretter | 2004-04-20 |
| 6621595 | System and method for enhancing scanned document images for color printing | Jian Fan, Daniel R. Tretter, Neerja Raman | 2003-09-16 |
| 6600573 | Fast green/magenta dithering of color images | Doran Shaked, Izhak Baharav | 2003-07-29 |
| 6335989 | Halftone printing using donut filters | — | 2002-01-01 |
| 6304333 | Apparatus and method of performing dithering in a simplex in color space | Doron Shaked, Nur Arad, Izhak Baharav | 2001-10-16 |
| 6204940 | Digital processing of scanned negative films | Malcolm Stuart Rix, Daniel R. Tretter, Michael Stokes | 2001-03-20 |
| 6178011 | Adaptive image resolution enhancement technology | Brent M. Bradburn, Brian E. Hoffmann | 2001-01-23 |
| 6016354 | Apparatus and a method for reducing red-eye in a digital image | Daniel R. Tretter, Konstantinos Konstantinides, Andrew J. Patti | 2000-01-18 |
| 5992962 | Print masks for inkjet printers | Jonathan Yen, Ping Wah Wong | 1999-11-30 |
| 5970178 | Adaptive halftoning based on image content | — | 1999-10-19 |
| 5966507 | Image resolution enhancement technology (IRET) for dual dye-load inkjet printer | — | 1999-10-12 |
| 5898505 | Resolution enhancement procedure and apparatus for a color laser printer | Brian E. Hoffmann, Jeffrey L. Trask | 1999-04-27 |
| 5812286 | Automatic color processing to correct hue shift and incorrect exposure | — | 1998-09-22 |
| 5812744 | Joint design of dither matrices for a set of colorants | Jan P. Allebach | 1998-09-22 |
| 5760920 | System and method for generating calibrated dither matrices | Brian E. Hoffmann | 1998-06-02 |
| 5710827 | Halftone dither cell with integrated preferred color matching | Alexander Perumal, Jr. | 1998-01-20 |
| 5689586 | Methods to print N-tone images with multi-leveling techniques | — | 1997-11-18 |
| 5615021 | Print N-tone images with imperceptible dots | — | 1997-03-25 |
| 5469515 | Halftone image formation using dither matrix generated based upon printed symbol models | — | 1995-11-21 |
| 5317418 | Halftone images using special filters | — | 1994-05-31 |