H04N 1/407
Control or modification of tonal gradation or of extreme levels
Official title: Control or modification of tonal gradation or of extreme levels, e.g. background level
H04N1/407 (Control or modification of tonal gradation or of extreme levels) appears on 2,435 US grants and 1,736 published applications in this corpus.
Search patents in H04N- Granted patents
- 2,435
- Published applications
- 1,736
- Assignees
- 482
- Inventors
- 3,663
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 4 | 0 |
| 1987 | 40 | 0 |
| 1988 | 19 | 0 |
| 1989 | 26 | 0 |
| 1990 | 34 | 0 |
| 1991 | 37 | 0 |
| 1992 | 37 | 0 |
| 1993 | 44 | 0 |
| 1994 | 61 | 0 |
| 1995 | 42 | 0 |
| 1996 | 53 | 0 |
| 1997 | 53 | 0 |
| 1998 | 89 | 0 |
| 1999 | 74 | 0 |
| 2000 | 75 | 0 |
| 2001 | 65 | 39 |
| 2002 | 61 | 97 |
| 2003 | 51 | 93 |
| 2004 | 87 | 91 |
| 2005 | 63 | 109 |
| 2006 | 97 | 103 |
| 2007 | 82 | 97 |
| 2008 | 71 | 90 |
| 2009 | 79 | 91 |
| 2010 | 61 | 86 |
| 2011 | 84 | 67 |
| 2012 | 106 | 70 |
| 2013 | 82 | 86 |
| 2014 | 101 | 49 |
| 2015 | 87 | 59 |
| 2016 | 51 | 43 |
| 2017 | 55 | 102 |
| 2018 | 77 | 74 |
| 2019 | 77 | 69 |
| 2020 | 85 | 58 |
| 2021 | 53 | 46 |
| 2022 | 35 | 41 |
| 2023 | 39 | 25 |
| 2024 | 27 | 25 |
| 2025 | 18 | 18 |
| 2026 | 8 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Medical information processing apparatus, method and non-transitory computer-readable storage medium to acquire biometric data regarding skin image and to continuously monitor internal body component without using special equipment31 Mar 2026US 12,591,969 B2Canon Medical Systems Corporation
- Method and apparatus for printing three-dimensional structures with image information24 Feb 2026US 12,558,848 B2NIKE, Inc.
- System and method for real-time tone-mapping24 Feb 2026US 12,561,774 B2Faurecia IRYStec Inc.
- Distance measuring method23 Jul 2026US 2026/0210698 A1Mitsubishi Electric Corporation
- Image processing apparatus and image processing method23 Jul 2026US 2026/0212471 A1Koninklijke Philips N. V.
- Image reading apparatus2 Apr 2026US 2026/0095537 A1Canon Kabushiki Kaisha
- Image processing apparatus to generate composite image, control method, and recording medium19 Mar 2026US 2026/0082133 A1Canon Kabushiki Kaisha
- Verification system, verification method, and verification program of id card5 Mar 2026US 2026/0064821 A1FUJIFILM Corporation
Most cited
By later US patents
- Stray light correction method for imaging light and color measurement system421US 6,975,775 B2Radiant Imaging, Inc. · 2005
- Apparatus and method for combining a plurality of images416US 5,982,951 ACanon Kabushiki Kaisha · 1999
- Method and apparatus for extending the dynamic range of an electronic imaging system294US 5,309,243 AEastman Kodak Company · 1994
- Method and apparatus for area selective exposure adjustment290US 5,818,975 AEastman Kodak Company · 1998
- Contrast enhancement of an image using luminance and RGB statistical metrics214US 6,393,148 B1Hewlett-Packard Company · 2002