H04N 1/32154
Transform domain methods
Official title: {Transform domain methods (H04N1/32309 takes precedence)}
H04N1/32154 (Transform domain methods) appears on 559 US grants and 485 published applications in this corpus.
Search patents in H04N- Granted patents
- 559
- Published applications
- 485
- Assignees
- 150
- Inventors
- 526
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 15 | 0 |
| 2001 | 24 | 21 |
| 2002 | 16 | 52 |
| 2003 | 31 | 45 |
| 2004 | 43 | 42 |
| 2005 | 20 | 46 |
| 2006 | 54 | 36 |
| 2007 | 29 | 33 |
| 2008 | 46 | 37 |
| 2009 | 40 | 33 |
| 2010 | 39 | 35 |
| 2011 | 42 | 27 |
| 2012 | 44 | 14 |
| 2013 | 26 | 8 |
| 2014 | 12 | 8 |
| 2015 | 10 | 4 |
| 2016 | 5 | 10 |
| 2017 | 7 | 10 |
| 2018 | 10 | 7 |
| 2019 | 8 | 3 |
| 2020 | 8 | 6 |
| 2021 | 3 | 2 |
| 2022 | 4 | 2 |
| 2023 | 2 | 2 |
| 2024 | 1 | 1 |
| 2025 | 3 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04N 1/3216Using fourier transforms243
- H04N 1/32187With selective or adaptive application of the additional information210
- H04N 1/32165Using cosine transforms100
- H04N 1/3217Using wavelet transforms87
- H04N 1/32176Using walsh, hadamard or walsh-hadamard transforms14
- H04N 1/32181Using karhunen-loeve transforms5
Recent patents
- NSCT-UPEMD-PHT based robust zero-watermarking algorithm and system28 Jul 2026US 12,694,077 B1Qiqihar University
- Image processing method and apparatus9 Sep 2025US 12,412,243 B2Huawei Technologies Co., Ltd.
- Determine whether OCR is to be performed for optimizing optical character recognition process1 Jul 2025US 12,348,691 B2FUJIFILM Business Innovation Corp.
- Digital invisible ink8 Apr 2025US 12,271,450 B2Xerox Corporation
- System and method for automatic identification of photocopied documents12 Mar 2024US 11,930,147 B2Sotec Consulting Sl
- Device and method for generating watermarked media17 Jul 2025US 2025/0232396 A1Ictk Co., Ltd.
- Digital invisible ink11 Jul 2024US 2024/0232302 A1Xerox Corporation
- Image processing method and apparatus8 Jun 2023US 2023/0177646 A1Huawei Technologies Co., Ltd.
- Information processing apparatus, non-transitory computer readable medium storing program, and information processing method30 Mar 2023US 2023/0102476 A1FUJIFILM Business Innovation Corp.
- System for data seclusion in image and audio files6 Oct 2022US 2022/0321737 A1
Most cited
By later US patents
- Methods for surveying dissemination of proprietary empirical data1,132US 5,862,260 ADigimarc Corporation · 1999
- Computer system linked by using information in data objects1,131US 6,122,403 ADigimarc Corporation · 2000
- Linking of computers based on optical sensing of digital data942US 6,311,214 B1Digimarc Corporation · 2001
- Watermark embedder and reader942US 6,614,914 B1Digimarc Corporation · 2003
- Connected audio and other media objects859US 6,505,160 B1Digimarc Corporation · 2003