H04N 9/646
For image enhancement
Official title: {for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters}
H04N9/646 (For image enhancement) appears on 1,629 US grants and 1,391 published applications in this corpus.
Search patents in H04N- Granted patents
- 1,629
- Published applications
- 1,391
- Assignees
- 538
- Inventors
- 2,649
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 7 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 11 | 0 |
| 1984 | 6 | 0 |
| 1985 | 15 | 0 |
| 1986 | 13 | 0 |
| 1987 | 25 | 0 |
| 1988 | 15 | 0 |
| 1989 | 19 | 0 |
| 1990 | 19 | 0 |
| 1991 | 25 | 0 |
| 1992 | 24 | 0 |
| 1993 | 20 | 0 |
| 1994 | 21 | 0 |
| 1995 | 18 | 0 |
| 1996 | 20 | 0 |
| 1997 | 11 | 0 |
| 1998 | 20 | 0 |
| 1999 | 24 | 0 |
| 2000 | 19 | 0 |
| 2001 | 9 | 0 |
| 2002 | 16 | 23 |
| 2003 | 12 | 22 |
| 2004 | 18 | 22 |
| 2005 | 9 | 40 |
| 2006 | 25 | 42 |
| 2007 | 18 | 49 |
| 2008 | 27 | 40 |
| 2009 | 32 | 54 |
| 2010 | 36 | 58 |
| 2011 | 37 | 40 |
| 2012 | 65 | 39 |
| 2013 | 55 | 48 |
| 2014 | 60 | 51 |
| 2015 | 64 | 102 |
| 2016 | 81 | 88 |
| 2017 | 83 | 93 |
| 2018 | 84 | 97 |
| 2019 | 90 | 97 |
| 2020 | 120 | 94 |
| 2021 | 86 | 88 |
| 2022 | 77 | 70 |
| 2023 | 54 | 56 |
| 2024 | 62 | 34 |
| 2025 | 45 | 31 |
| 2026 | 11 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems, methods, and media for generating digital images using low bit depth image sensor data22 Sep 2026US 12,743,747 B2Wisconsin Alumni Research Foundation
- System on chip and method for operating system on chip18 Aug 2026US 12,713,156 B2Samsung Electronics Co., Ltd.
- System for producing consistent medical image data that is verifiably correct30 Jun 2026US 12,670,624 B1
- Image processing apparatus, image pickup apparatus, lens apparatus, image processing method, and storage medium for correcting color shading in image data23 Jun 2026US 12,665,994 B2Canon Kabushiki Kaisha
- Imaging apparatus, imaging method, and program16 Jun 2026US 12,657,656 B2FUJIFILM Corporation
- Video delivery system capable of dynamic-range changes24 Sep 2026US 2026/0289755 A1Dolby Laboratories Licensing Corporation
- Efficient electro-optical transfer function (eotf) curve for standard dynamic range (sdr) content10 Sep 2026US 2026/0270366 A1Microsoft Technology Licensing, LLC
- Method and device for reducing flicker for successive pixels of temporally alternating complementary colors6 Aug 2026US 2026/0229159 A1InterDigital CE Patent Holdings, SAS
- Method of determining color correction matrix, color correction method and electronic device30 Jul 2026US 2026/0222525 A1Samsung Electronics Co., Ltd.
- Vision defect determination via fixation point adjustment23 Jul 2026US 2026/0207047 A1University of Miami
Most cited
By later US patents
- Use of laser light and red-green-blue coloration to determine properties of back scattered light532US 11,100,631 B2Cilag GmbH International · 2021
- YCBCR pulsed illumination scheme in a light deficient environment347US 9,516,239 B2DePuy Synthes Products, Inc. · 2016
- Ambient light contrast and color control circuit249US 4,090,216 AGTE Sylvania Incorporated · 1978
- Signal processing method and apparatus for producing interpolated chrominance values in a sampled color image signal181US 4,642,678 AEastman Kodak Company · 1987
- Video signal processor for detecting flesh tones in am image175US 5,488,429 AMitsubishi Denki Kabushiki Kaisha · 1996