H04N 1/644
Using a reduced set of representative colours
Official title: {using a reduced set of representative colours, e.g. each representing a particular range in a colour space}
H04N1/644 (Using a reduced set of representative colours) appears on 312 US grants and 249 published applications in this corpus.
Search patents in H04N- Granted patents
- 312
- Published applications
- 249
- Assignees
- 160
- Inventors
- 558
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 6 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 3 |
| 2002 | 5 | 2 |
| 2003 | 6 | 13 |
| 2004 | 6 | 9 |
| 2005 | 10 | 12 |
| 2006 | 10 | 11 |
| 2007 | 14 | 3 |
| 2008 | 11 | 13 |
| 2009 | 4 | 13 |
| 2010 | 4 | 16 |
| 2011 | 10 | 11 |
| 2012 | 23 | 10 |
| 2013 | 17 | 12 |
| 2014 | 17 | 6 |
| 2015 | 7 | 15 |
| 2016 | 20 | 18 |
| 2017 | 17 | 11 |
| 2018 | 11 | 21 |
| 2019 | 10 | 4 |
| 2020 | 10 | 7 |
| 2021 | 8 | 10 |
| 2022 | 10 | 8 |
| 2023 | 6 | 7 |
| 2024 | 7 | 6 |
| 2025 | 5 | 5 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Image dithering apparatus and method having a random dithering mechanism7 Apr 2026US 12,597,090 B2Realtek Semiconductor Corp.
- Adjustments to encoding and decoding when switching color spaces10 Feb 2026US 12,549,744 B2Microsoft Technology Licensing, LLC
- Encoders for improved image dithering2 Dec 2025US 12,488,510 B2Google Inc.
- Compressed chip to chip transmission11 Nov 2025US 12,470,725 B2Texas Instruments Incorporated
- Image processing apparatus capable of generating color-reduced image with high object reproducibility, control method for image processing apparatus, and storage medium16 Sep 2025US 12,418,622 B2Canon Kabushiki Kaisha
- Systems and methods for color transformation via document specific abstract profiles4 Jun 2026US 2026/0156225 A1
- Method and Device for Processing Image, Nonvolatile Storage Medium, and Computer Apparatus26 Mar 2026US 2026/0089287 A1Leyard Optoelectronic Co., Ltd.
- Compressed chip to chip transmission5 Feb 2026US 2026/0039845 A1Texas Instruments Incorporated
- Adjustments to encoding and decoding when switching color spaces10 Jul 2025US 2025/0227263 A1Microsoft Technology Licensing, LLC
- Adjustments to encoding and decoding when switching color spaces10 Jul 2025US 2025/0227264 A1Microsoft Technology Licensing, LLC
Most cited
By later US patents
- Method and system operative to process color image data541US 8,600,158 B2Hand Held Products, Inc. · 2013
- Method and system operative to process color image data476US 8,849,019 B2Hand Held Products, Inc. · 2014
- Color image processing with adjustment of computed recording color to match original color116US 5,270,808 ACanon Kabushiki Kaisha · 1993
- Image production using color error diffusion115US 5,621,545 A1997
- Compression of palettized images and binarization for bitwise coding of M-ary alphabets therefor102US 5,471,207 ARicoh Company, Ltd. · 1995