Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5625378 | Method and apparatus for convex interpolation for color calibration | Shijie Wan, James R. Sullivan | 1997-04-29 |
| 5553199 | Method and apparatus for calibrating a four color printer | Kevin E. Spaulding, Douglas W. Couwenhoven | 1996-09-03 |
| 5452403 | Process for selecting output levels for multi-level halftone in the presence of an unstable display device | — | 1995-09-19 |
| 5444551 | Process for specifying mean-preserving mutli-level halftone matrices with varying amounts of modulation | Craig M. Smith | 1995-08-22 |
| 5291311 | Apparatus and method for generating multi-level output values for pixels in a halftone cell | — | 1994-03-01 |
| 5150429 | Image processor with error diffusion modulated threshold matrix | Craig M. Smith | 1992-09-22 |
| 5070413 | Color digital halftoning with vector error diffusion | James R. Sullivan, Thomas J. Wetzel | 1991-12-03 |
| 5014333 | Image processor with smooth transitioning between dither and diffusion processes | Roger R. A. Morton | 1991-05-07 |
| 4920501 | Digital halftoning with minimum visual modulation patterns | James R. Sullivan | 1990-04-24 |