H04N 1/4074
Using histograms
Official title: {using histograms}
H04N1/4074 (Using histograms) appears on 379 US grants and 295 published applications in this corpus.
Search patents in H04N- Granted patents
- 379
- Published applications
- 295
- Assignees
- 147
- Inventors
- 614
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 10 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 8 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 10 | 0 |
| 1999 | 11 | 0 |
| 2000 | 9 | 0 |
| 2001 | 11 | 7 |
| 2002 | 5 | 18 |
| 2003 | 11 | 21 |
| 2004 | 15 | 14 |
| 2005 | 9 | 12 |
| 2006 | 21 | 19 |
| 2007 | 14 | 22 |
| 2008 | 11 | 13 |
| 2009 | 14 | 22 |
| 2010 | 15 | 14 |
| 2011 | 17 | 16 |
| 2012 | 16 | 6 |
| 2013 | 14 | 14 |
| 2014 | 15 | 13 |
| 2015 | 14 | 19 |
| 2016 | 11 | 11 |
| 2017 | 15 | 9 |
| 2018 | 12 | 8 |
| 2019 | 8 | 13 |
| 2020 | 15 | 9 |
| 2021 | 9 | 4 |
| 2022 | 5 | 4 |
| 2023 | 3 | 2 |
| 2024 | 2 | 3 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Imaging apparatus and control method for imaging apparatus15 Jul 2025US 12,363,450 B2Canon Kabushiki Kaisha
- Global tone mapping25 Feb 2025US 12,238,427 B2GoPro, Inc.
- Enhancing light text in scanned documents while preserving document fidelity10 Dec 2024US 12,165,299 B2Adobe Inc.
- Image processing system and image processing method13 Feb 2024US 11,900,574 B2Evident Corporation
- Image forming apparatus capable of forming image on sheet with uneven surface, image forming condition adjustment method19 Dec 2023US 11,849,094 B2KYOCERA Document Solutions Inc.
- Enhancing light text in scanned documents while preserving document fidelity16 Oct 2025US 2025/0322501 A1Adobe Inc.
- Global tone mapping15 May 2025US 2025/0159364 A1GoPro, Inc.
- Data conversion device, data conversion method, and recording medium19 Dec 2024US 2024/0422280 A1Fujitsu Frontech Limited
- Global tone mapping25 Apr 2024US 2024/0137658 A1GoPro, Inc.
- Imaging apparatus and control method for imaging apparatus18 Jan 2024US 2024/0022829 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Contrast enhancement of an image using luminance and RGB statistical metrics214US 6,393,148 B1Hewlett-Packard Company · 2002
- Method and apparatus for automatic detection of image target gamma194US 6,192,149 B1Xerox Corporation · 2001
- Method and apparatus for the automatic analysis of density range, color cast, and gradation of image originals on the BaSis of image values transformed from a first color space into a second color space173US 5,668,890 ALinotype-Hell AG · 1997
- System and method for eliminating background pixels from a scanned image137US 6,222,642 B1Xerox Corporation · 2001
- Image-dependent exposure enhancement111US 5,414,538 AXerox Corporation · 1995