Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8531474 | Methods, systems and apparatus for jointly calibrating multiple displays in a display ensemble | James Zhixin Chang, Chizu Watanabe | 2013-09-10 |
| 8400692 | Systems and methods for embedding metadata in a color measurement target | James Zhixin Chang | 2013-03-19 |
| 8310716 | Systems and methods for designing a set of black generation transfer curves | James Zhixin Chang | 2012-11-13 |
| 8027070 | Methods and systems for hue adjustment | — | 2011-09-27 |
| 7995242 | Systems and methods for attenuation of near-neutral image colors | Jon M. Speigle, Dana S. Smith | 2011-08-09 |
| 7889402 | Method for limiting total colorant coverage using multidimensional simplicial subdivision and barycentric interpolation | James Zhixin Chang | 2011-02-15 |
| 7847974 | Systems and methods for dynamically limiting total colorant coverage in a color rendering system | James Zhixin Chang | 2010-12-07 |
| 7742206 | Methods and systems for color gamut adjustment | James Zhixin Chang | 2010-06-22 |
| 7554698 | Robust document boundary determination | John E. Dolan | 2009-06-30 |
| 7545541 | Systems and methods for embedding metadata in a color measurement target | James Zhixin Chang | 2009-06-09 |
| 7421118 | System and method for attenuating color-cast correction in image highlight areas | — | 2008-09-02 |
| 7277203 | Method of improving start-up behavior for color error diffusion digital half-toning | — | 2007-10-02 |
| 7190487 | Color conversion with hue straightening using multiple look-up tables and interpolation | James Zhixin Chang, Chizu Inoue | 2007-03-13 |
| 7161706 | System for improving digital coplers and multifunction peripheral devices | Burton L. Levin, John E. Dolan | 2007-01-09 |
| 7149001 | System for supporting a multiplicity of copy features | John E. Dolan | 2006-12-12 |
| 6995866 | Method and apparatus for background adjustment in color reproduction devices | Xiao-fan Feng, Jon M. Speigle, James Zhixin Chang | 2006-02-07 |
| 6987880 | Efficient document boundary determination | John E. Dolan, James Zhixin Chang, Xiao-fan Feng | 2006-01-17 |
| 5867016 | Duty cycle based AC power control with reduced voltage fluctuations | Bruce Baur, Cory A. Westerlund | 1999-02-02 |
| 5243414 | Color processing system | Patrick E. Welborn, Christopher D. Shaver | 1993-09-07 |
| 5185599 | Local display bus architecture and communications method for Raster display | Douglas J. Doornink, David L. Knierim | 1993-02-09 |
| 5181014 | Method and apparatus for representing three-dimensional color data in a one-dimensional reference system | Scott W. Bigger | 1993-01-19 |
| 5142617 | Method of shading a graphics image | V. B. Sureshkumar | 1992-08-25 |
| 5084830 | Method and apparatus for hidden surface removal | Douglas J. Doornink | 1992-01-28 |
| 4951230 | Method and apparatus for tiling an image | Suresh Kumar, Peter Parkinson | 1990-08-21 |
| 4862155 | Graphic display system with secondary pixel image storage | Byron G. Paul | 1989-08-29 |