H04N 1/4078
Using gradational references
Official title: {using gradational references, e.g. grey-scale test pattern analysis}
H04N1/4078 (Using gradational references) appears on 480 US grants and 312 published applications in this corpus.
Search patents in H04N- Granted patents
- 480
- Published applications
- 312
- Assignees
- 140
- Inventors
- 858
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 8 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 11 | 0 |
| 1994 | 12 | 0 |
| 1995 | 9 | 0 |
| 1996 | 12 | 0 |
| 1997 | 11 | 0 |
| 1998 | 17 | 0 |
| 1999 | 20 | 0 |
| 2000 | 23 | 0 |
| 2001 | 19 | 8 |
| 2002 | 19 | 13 |
| 2003 | 13 | 17 |
| 2004 | 18 | 16 |
| 2005 | 13 | 26 |
| 2006 | 19 | 17 |
| 2007 | 16 | 18 |
| 2008 | 8 | 15 |
| 2009 | 17 | 14 |
| 2010 | 9 | 13 |
| 2011 | 13 | 11 |
| 2012 | 19 | 12 |
| 2013 | 12 | 12 |
| 2014 | 18 | 15 |
| 2015 | 18 | 6 |
| 2016 | 7 | 10 |
| 2017 | 10 | 19 |
| 2018 | 15 | 10 |
| 2019 | 15 | 7 |
| 2020 | 13 | 14 |
| 2021 | 9 | 14 |
| 2022 | 8 | 6 |
| 2023 | 12 | 7 |
| 2024 | 5 | 6 |
| 2025 | 3 | 5 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Printing apparatus, reading method, and reading apparatus19 May 2026US 12,632,685 B2Seiko Epson Corporation
- Image processing apparatus, printing system, and image processing method for thin line processing19 May 2026US 12,634,405 B2Seiko Epson Corporation
- Method and apparatus for printing three-dimensional structures with image information24 Feb 2026US 12,558,848 B2NIKE, Inc.
- Image processing device, image forming apparatus, image processing method, and non-transitory recording medium30 Sep 2025US 12,427,787 B2Ricoh Company, Ltd.
- Image processing apparatus, image processing method, non-transitory computer-readable storage medium, and image forming apparatus29 Jul 2025US 12,370,806 B2Canon Kabushiki Kaisha
- Streak-shaped defect classification method and streak-shaped defect classification system29 Jan 2026US 2026/0030868 A1SCREEN Holdings Co., Ltd.
- Image forming apparatus and image forming method11 Dec 2025US 2025/0377621 A1Sharp Kabushiki Kaisha
- Image processing apparatus, image processing method, non-transitory computer-readable storage medium, and image forming apparatus30 Oct 2025US 2025/0332844 A1Canon Kabushiki Kaisha
- Method for detecting malfunctional nozzles in a printing head and printing device9 Oct 2025US 2025/0313026 A1Bobst Mex SA
- Printing system and printing device correction value acquisition method2 Oct 2025US 2025/0303768 A1Seiko Epson Corporation
Most cited
By later US patents
- Halftone correction systems163US 5,854,882 AUniversity of Rochester · 1998
- Printer having print output linked to scanner input for automated image quality adjustment145US 5,884,118 AXerox Corporation · 1999
- Automated image quality control127US 5,600,574 AMinnesota Mining and Manufacturing Company · 1997
- Ink jet printing apparatus performing printing with correction of image data at boundary portion of image119US 6,033,137 ACanon Kabushiki Kaisha · 2000
- Automated image calibration112US 5,185,673 AHewlett-Packard Company · 1993