Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6233360 | Method and system for hybrid error diffusion processing of image information using adaptive white and black reference values | David J. Metcalfe, Xiao-fan Feng, John T. Newell | 2001-05-15 |
| 6043900 | Method and system for automatically detecting a background type of a scanned document utilizing a leadedge histogram thereof | Xiao-fan Feng | 2000-03-28 |
| 5805724 | Method and system for hybrid error diffusion processing of image information using dynamic screens based on brightness/darkness settings | David J. Metcalfe, John T. Newell, Xiao-fan Feng | 1998-09-08 |
| 4941057 | Digital image proofing | Donald R. Lehmbeck, Kevin Marks | 1990-07-10 |