Issued Patents All Time
Showing 26–50 of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6031626 | Color stochastic screening with optimal color dot placement | Hakan Ancin, Anoop K. Bhattacharjya, Chia-Hsin Li | 2000-02-29 |
| 5963715 | Color stochastic screening with optimal color dot placement for display devices having arbitrary aspect ratios | Hakan Ancin, Anoop K. Bhattacharjya, Chia-Hsin Li | 1999-10-05 |
| 5963714 | Multicolor and mixed-mode halftoning | Anoop K. Bhattacharjya, Hakan Ancin | 1999-10-05 |
| 5946454 | Image enhancement during half-toning using low-pass and high-pass filtering | Chia-Hsin Li | 1999-08-31 |
| 5920682 | Multiple layer cluster dither matrix for reducing artifacts in printed images | Andrei Pascovici, Chia-Hsin Li | 1999-07-06 |
| 5905490 | Generating color-correction look-up-table addresses by multi-level half-toning | Chia-Hsin Li | 1999-05-18 |
| 5883973 | Method and apparatus for processing a document by segmentation into text and image areas | Andrei Pascovici | 1999-03-16 |
| 5875287 | Banding noise reduction for clustered-dot dither | Chia-Hsin Li | 1999-02-23 |
| 5872896 | Continuous-tone ink reduction | Chia-Hsin Li | 1999-02-16 |
| 5841951 | Ink duty-cycle control | Chia-Hsin Li | 1998-11-24 |
| 5838885 | Salt-and-pepper-noise reduction | Jack Boyce | 1998-11-17 |
| 5822502 | Cluster dither ink duty limit control | Chia-Hsin Li | 1998-10-13 |
| 5802212 | Clustered-dot dither with white-fleck suppression | Chia-Hsin Li | 1998-09-01 |
| 5799136 | On-line ink-duty reduction | Chia-Hsin Li, Andrei Pascovici, Dennis Lai Chao | 1998-08-25 |
| 5796929 | Banding and ink-bleeding reduction in cluster dither by screen displacement | Chia-Hsin Li | 1998-08-18 |
| 5768411 | Dispersed-dot dither with improved light-color smoothness | Chia-Hsin Li | 1998-06-16 |
| 5757976 | Adaptive filtering and thresholding arrangement for reducing graininess of images | — | 1998-05-26 |
| 5739917 | Error-diffusion-type half-toning employing adaptive thresholding for enhanced smoothness | Jack Boyce | 1998-04-14 |
| 5692109 | Method and apparatus for minimizing artifacts in images produced by error diffusion halftoning | — | 1997-11-25 |
| 5684932 | Method and apparatus for dither array generation to reduce artifacts in halftoned image data utilizing ink reduction processing | — | 1997-11-04 |
| 5675716 | Method and apparatus for vivid color correction in binary printing devices | — | 1997-10-07 |
| 5625755 | Method and apparatus for tonal correction in binary printing devices by predistortion of image data utilizing ink reduction processing | — | 1997-04-29 |
| 5594839 | Apparatus and method for improving black and color separation in halftoned images by printing black dots in a different screen phase | — | 1997-01-14 |
| 5592592 | Method and apparatus for minimizing artifacts in images produced by error diffusion halftoning utilizing ink reduction processing | — | 1997-01-07 |
| 5568572 | Method and apparatus for tonal correction in binary printing devices by predistortion of image data | — | 1996-10-22 |