Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8842938 | Method and system for performing resolution expansion with high quality edge enhancement | Xing Li, David J. Metcalfe | 2014-09-23 |
| 8792706 | Determining an orientation direction of a color edge at a pixel location in a color image | Xing Li, Meng Yao | 2014-07-29 |
| 8787653 | Determining an orientation direction of a color edge at a pixel location in a color image | Xing Li, Meng Yao | 2014-07-22 |
| 8254694 | Thin line detection in scanned image data | Xing Li, Ryan Metcalfe, Peter McCandlish | 2012-08-28 |
| 8224112 | Fuzzy method to detect thin lines in scanned image | Peter McCandlish, Xing Li, Ryan Metcalfe | 2012-07-17 |
| 7844118 | Image segmentation system and method with improved thin line detection | Xing Li, Peter McCandlish, Ryan Metcalfe | 2010-11-30 |
| 6930804 | System and method for automatically detecting edges of scanned documents | — | 2005-08-16 |
| 6741741 | System and method for automatically detecting edges of scanned documents | — | 2004-05-25 |
| 6236751 | Automatic method for determining piecewise linear transformation from an image histogram | — | 2001-05-22 |
| 6222642 | System and method for eliminating background pixels from a scanned image | Jeng-Nan Shiau | 2001-04-24 |
| 6198845 | Method for determining document background for adjusting the dynamic range of an image of the document | Francis K. Tse, Ramesh Nagarajan, Andre Blaakman, Richard S. Fox, George W. Lahue +1 more | 2001-03-06 |
| 5881166 | Method and system for generating a histogram of a scanned image | — | 1999-03-09 |
| 5848183 | System and method for generating and utilizing histogram data from a scanned image | — | 1998-12-08 |
| 5835628 | Method and system for generating histograms from a scanned image | — | 1998-11-10 |
| 5751848 | System and method for generating and utilizing histogram data from a scanned image | — | 1998-05-12 |
| 5293430 | Automatic image segmentation using local area maximum and minimum image signals | Jeng-Nan Shiau | 1994-03-08 |
| 5282061 | Programmable apparatus for determining document background level | — | 1994-01-25 |
| 4757348 | High speed electronic reprographic/printing machine | John L. Rourke, Robert F. Buchheit | 1988-07-12 |
| 4716438 | High speed electronic reprographic/printing machine | — | 1987-12-29 |