H04N 23/673
Based on contrast or high frequency components of image signals
Official title: {based on contrast or high frequency components of image signals, e.g. hill climbing method}
H04N23/673 (Based on contrast or high frequency components of image signals) appears on 2,702 US grants and 2,830 published applications in this corpus.
Search patents in H04N- Granted patents
- 2,702
- Published applications
- 2,830
- Assignees
- 392
- Inventors
- 2,982
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 10 | 0 |
| 1990 | 12 | 0 |
| 1991 | 21 | 0 |
| 1992 | 12 | 0 |
| 1993 | 17 | 0 |
| 1994 | 16 | 0 |
| 1995 | 24 | 0 |
| 1996 | 22 | 0 |
| 1997 | 17 | 0 |
| 1998 | 14 | 0 |
| 1999 | 21 | 0 |
| 2000 | 20 | 0 |
| 2001 | 19 | 19 |
| 2002 | 22 | 37 |
| 2003 | 20 | 46 |
| 2004 | 35 | 74 |
| 2005 | 30 | 96 |
| 2006 | 38 | 117 |
| 2007 | 44 | 120 |
| 2008 | 68 | 155 |
| 2009 | 114 | 138 |
| 2010 | 134 | 170 |
| 2011 | 131 | 149 |
| 2012 | 153 | 166 |
| 2013 | 168 | 192 |
| 2014 | 180 | 191 |
| 2015 | 187 | 187 |
| 2016 | 194 | 172 |
| 2017 | 167 | 150 |
| 2018 | 139 | 111 |
| 2019 | 149 | 108 |
| 2020 | 109 | 101 |
| 2021 | 77 | 68 |
| 2022 | 86 | 73 |
| 2023 | 61 | 48 |
| 2024 | 50 | 54 |
| 2025 | 50 | 44 |
| 2026 | 32 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Observation system, focus position calculation method, and computer readable medium29 Sep 2026US 12,748,281 B2Evident Corporation
- Distance measurement device, distance measurement method, and distance measurement program25 Aug 2026US 12,716,711 B2FUJIFILM Corporation
- Methods and systems for high-magnification photography exploiting reflective polarizers and faraday rotators25 Aug 2026US 12,717,122 B2Lumenuity, Inc.
- Focus adjustment apparatus and method, image capturing apparatus, image capturing system, and storage medium25 Aug 2026US 12,720,198 B2Canon Kabushiki Kaisha
- Regions of interest in autofocus processing25 Aug 2026US 12,720,213 B2QUALCOMM Incorporated
- Electronic device, imaging device, image reproduction method, image reproduction program, recording medium with image reproduction program recorded thereupon, and image reproduction device24 Sep 2026US 2026/0292076 A1Nikon Corporation
- Information processing device, imaging device, information processing method, and program10 Sep 2026US 2026/0270558 A1FUJIFILM Corporation
- Focusing control device, imaging apparatus, focusing control method, and focusing control program20 Aug 2026US 2026/0247035 A1FUJIFILM Corporation
- Automatic focusing method, lens module and imaging device20 Aug 2026US 2026/0247036 A1Glenfly Tech Co., Ltd.
- Imaging apparatus13 Aug 2026US 2026/0235926 A1Nikon Corporation
Most cited
By later US patents
- Hall-effect based linear motor controller1,018US 8,084,969 B2Allegro MicroSystems, LLC · 2011
- Two-dimensional imager with solid-state auto-focus496US 8,988,590 B2Intermec IP Corp. · 2015
- Wearable camera system with viewfinder means359US 6,307,526 B12001
- Distance measuring method and a distance measuring apparatus223US 5,576,975 AFujitsu Limited · 1996
- System and method for generating a contrast overlay as a focus assist for an imaging device199US 5,496,106 AApple Computer, Inc. · 1996