Issued Patents All Time
Showing 126–150 of 165 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7180635 | Halftone image gloss control for glossmarks | Beilei Xu, Chu-heng Liu | 2007-02-20 |
| 7148999 | Variable glossmark | Beilei Xu, Chu-heng Liu | 2006-12-12 |
| 7139101 | Anisotropic stochastic screen | Robert P. Loce, Beilei Xu | 2006-11-21 |
| 7136189 | Color halftoning using a multi-level successive-filling halftone screening algorithm | Gaurav Sharma, Helen HaeKyung Shin, Zhigang Fan | 2006-11-14 |
| 7126721 | Protecting printed items intended for public exchange with glossmarks | Beilei Xu, Chu-heng Liu | 2006-10-24 |
| 7092128 | Application of glossmarks for graphics enhancement | Beilei Xu, Chu-heng Liu | 2006-08-15 |
| 7064860 | Color-balanced TRC correction to compensate for illuminant changes in printer characterization | Thyagarajan Balasubramanian | 2006-06-20 |
| 7006256 | Watermarked image generator and method of embedding watermarks into an input image | Hui Cheng, Zhigang Fan, Ying-wei Lin | 2006-02-28 |
| 6991260 | Anti-counterfeiting see-through security feature using line patterns | Zhigang Fan | 2006-01-31 |
| 6985256 | Halftoning using dot and line screens to avoid two and three color moiré | Xiaoxue Cheng, Robert P. Loce, Beilei Xu | 2006-01-10 |
| 6985262 | Method for four-color zero-moire halftoning using non-orthogonal halftone cells | — | 2006-01-10 |
| 6956958 | Method of embedding color information in printed documents using watermarking | Zhigang Fan, Hui Cheng | 2005-10-18 |
| 6917443 | Composite halftone screens with stochastically distributed clusters or lines | — | 2005-07-12 |
| 6903769 | Detecting hopping pixel defects in CCD image sensors | Thomas R. Carducci | 2005-06-07 |
| 6870640 | Method and apparatus for rendering a continuous tone image representation with multiple digital halftoning | Zhigang Fan | 2005-03-22 |
| 6844941 | Color halftoning using a single successive-filling halftone screen | Gaurav Sharma, Zhigang Fan | 2005-01-18 |
| 6798539 | Method for moire-free color halftoning using non-orthogonal cluster screens | Zhigang Fan, Zhenhuan Wen | 2004-09-28 |
| 6775029 | Method for efficient calibration of printing devices | Zhenhuan Wen, Fritz Francis Ebner | 2004-08-10 |
| 6731409 | System and method for generating color digital watermarks using conjugate halftone screens | — | 2004-05-04 |
| 6717696 | Systems and methods for moiré-reduced halftoning | Zhigang Fan | 2004-04-06 |
| 6647140 | Spectrum inverter apparatus and method | Gaurav Sharma | 2003-11-11 |
| 6526155 | Systems and methods for producing visible watermarks by halftoning | Keith T. Knox | 2003-02-25 |
| 6501567 | Method and system for designing spatially-partitioned and correlated stochastic screens for color halftoning | Gaurav Sharma | 2002-12-31 |
| 6435654 | Color calibration for digital halftoning | Steven J. Harrington | 2002-08-20 |
| 6330078 | Feedback method and apparatus for printing calibration | — | 2001-12-11 |