H04N 1/40087
Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two
Official title: {Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two discrete brightnesses or optical densities, e.g. dots of grey and black inks on white paper}
H04N1/40087 (Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two) appears on 387 US grants and 228 published applications in this corpus.
Search patents in H04N- Granted patents
- 387
- Published applications
- 228
- Assignees
- 108
- Inventors
- 583
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 13 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 3 | 0 |
| 1994 | 9 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 7 | 0 |
| 1998 | 22 | 0 |
| 1999 | 11 | 0 |
| 2000 | 19 | 0 |
| 2001 | 15 | 4 |
| 2002 | 16 | 14 |
| 2003 | 12 | 21 |
| 2004 | 16 | 14 |
| 2005 | 11 | 21 |
| 2006 | 15 | 21 |
| 2007 | 18 | 15 |
| 2008 | 10 | 13 |
| 2009 | 20 | 10 |
| 2010 | 12 | 8 |
| 2011 | 12 | 9 |
| 2012 | 10 | 0 |
| 2013 | 4 | 6 |
| 2014 | 5 | 7 |
| 2015 | 15 | 10 |
| 2016 | 8 | 11 |
| 2017 | 6 | 4 |
| 2018 | 9 | 10 |
| 2019 | 4 | 6 |
| 2020 | 12 | 7 |
| 2021 | 5 | 7 |
| 2022 | 6 | 5 |
| 2023 | 4 | 2 |
| 2024 | 3 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Image processing apparatus to improve dot dispersibility with N-gradation multi-valued data, image processing method, and storage medium13 May 2025US 12,301,773 B2Canon Kabushiki Kaisha
- Reordered multibit halftone processing with a threshold array27 Aug 2024US 12,075,016 B1Ricoh Company, Ltd.
- Multilayer white printing with white-balance2 Jul 2024US 12,023,939 B2Fiery, LLC
- Image processing apparatus, image processing method, and storage medium which reduce a color difference and a frequency difference between two images19 Mar 2024US 11,936,835 B2Canon Kabushiki Kaisha
- Printing apparatus and data processing method19 Sep 2023US 11,762,609 B2Seiko Epson Corporation
- Image reading apparatus and image forming system30 Apr 2026US 2026/0122193 A1Canon Kabushiki Kaisha
- Method and Device for Processing Image, Nonvolatile Storage Medium, and Computer Apparatus26 Mar 2026US 2026/0089287 A1Leyard Optoelectronic Co., Ltd.
- Multilayer white printing with white-balance23 May 2024US 2024/0165962 A1Fiery, LLC
- Image processing apparatus, image processing method, and non-transitory computer-readable storage medium storing program21 Dec 2023US 2023/0412751 A1Canon Kabushiki Kaisha
- Printing apparatus and data processing method18 May 2023US 2023/0153043 A1Seiko Epson Corporation
Most cited
By later US patents
- Method and apparatus for gray level signal processing120US 4,547,811 ANippon Telegraph & Telephone Public Corporation · 1985
- Method for color image processing117US 4,941,038 AThe Mead Corporation · 1990
- Halftone image recording method using recording data having a plurality of concentrations for one color79US 4,860,026 ACanon Kabushiki Kaisha · 1989
- Method for recording a color image using dots of colorants of different densities78US 4,672,432 ACanon Kabushiki Kaisha · 1987
- Intermediate gradient image producing method73US 4,635,078 ACanon Kabushiki Kaisha · 1987