H04N 1/405
Halftoning, i.e. converting the picture signal of a continuous-tone original into a
Official title: Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
H04N1/405 (Halftoning, i.e. converting the picture signal of a continuous-tone original into a) appears on 2,934 US grants and 1,904 published applications in this corpus.
Search patents in H04N- Granted patents
- 2,934
- Published applications
- 1,904
- Assignees
- 455
- Inventors
- 2,913
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 11 | 0 |
| 1979 | 5 | 0 |
| 1980 | 11 | 0 |
| 1981 | 8 | 0 |
| 1982 | 9 | 0 |
| 1983 | 21 | 0 |
| 1984 | 15 | 0 |
| 1985 | 29 | 0 |
| 1986 | 14 | 0 |
| 1987 | 39 | 0 |
| 1988 | 30 | 0 |
| 1989 | 38 | 0 |
| 1990 | 52 | 0 |
| 1991 | 53 | 0 |
| 1992 | 58 | 0 |
| 1993 | 82 | 0 |
| 1994 | 79 | 0 |
| 1995 | 66 | 0 |
| 1996 | 74 | 0 |
| 1997 | 77 | 0 |
| 1998 | 109 | 0 |
| 1999 | 75 | 0 |
| 2000 | 77 | 0 |
| 2001 | 66 | 18 |
| 2002 | 54 | 78 |
| 2003 | 50 | 64 |
| 2004 | 66 | 121 |
| 2005 | 60 | 137 |
| 2006 | 101 | 150 |
| 2007 | 97 | 120 |
| 2008 | 101 | 113 |
| 2009 | 111 | 115 |
| 2010 | 85 | 94 |
| 2011 | 100 | 70 |
| 2012 | 97 | 99 |
| 2013 | 112 | 64 |
| 2014 | 125 | 74 |
| 2015 | 100 | 75 |
| 2016 | 72 | 60 |
| 2017 | 75 | 98 |
| 2018 | 75 | 89 |
| 2019 | 88 | 67 |
| 2020 | 85 | 47 |
| 2021 | 38 | 40 |
| 2022 | 36 | 41 |
| 2023 | 39 | 26 |
| 2024 | 29 | 19 |
| 2025 | 20 | 16 |
| 2026 | 8 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Determination method and recovery method15 Sep 2026US 12,736,898 B2Canon Kabushiki Kaisha
- Method of generating multiplexed image for printing based on color values gamut-mapped to inside maximum volume hyperrectangle8 Sep 2026US 12,732,586 B2Centre National De La Recherche Scientifique
- Additive manufacturing process for producing chemical delivery devices using halftone screening28 Jul 2026US 12,691,640 B2Genesee Valley Innovations, LLC
- Image forming apparatus performing halftone processing shifting scan line start position in main-scan direction when scan lines are shifted in sub-scan direction relative to target21 Jul 2026US 12,689,697 B2Canon Kabushiki Kaisha
- Method for smoother tonal response in flexographic printing26 May 2026US 12,636,900 B2Esko Software BV
- Additive manufacturing process for producing chemical delivery devices using screening8 Oct 2026US 2026/0307336 A1Genesee Valley Innovations, LLC
- Reading apparatus, reading method, and storage medium8 Oct 2026US 2026/0313062 A1Canon Kabushiki Kaisha
- Feature detection edge enhancement mechanism10 Sep 2026US 2026/0268499 A1Ricoh Company, Ltd.
- Feature detection edge enhancement mechanism10 Sep 2026US 2026/0268500 A1Ricoh Company, Ltd.
- Method for Making a Printing Plate13 Aug 2026US 2026/0233509 A1Eco3 BV
Most cited
By later US patents
- Method and system operative to process monochrome image data540US 8,571,307 B2Hand Held Products, Inc. · 2013
- Image rendering system and method for generating stochastic threshold arrays for use therewith194US 5,745,660 APolaroid Corporation · 1998
- Halftone correction systems163US 5,854,882 AUniversity of Rochester · 1998
- Scanning apparatus for halftone image screen writing145US 4,965,599 AEastman Kodak Company · 1990
- Cache updating method and apparatus144US 7,181,572 B2Silverbrook Research Pty Ltd · 2007