US7349555B2
Active / In Force
US
⏱️ 0.3 years remaining
Documents and apparatus to encode documents
Assignee: Digimarc Corp
•
Filing: 2007-02-26
•
Granted: 2008-03-25
•
Expires: 2027-02-26
Abstract
Abstract The present invention relates generally to documents, e.g., such as legal tender, currency and identification documents, and apparatus for encoding documents. One claim recites: a physical document including a machine-detectable hidden signal. Presence of the hidden signal is determined by collecting visible light image data associated with the document and transforming the image data to a complementary domain to generate transform data. Presence of a telltale pattern in the transform data indicates a presence of the hidden signal. The hidden signal is associated with a type or status of the physical document. One type is legal tender. Another type is an identification document. An example of status is “do not copy”. Of course, other combinations are claimed as well.
Inventors
- 👤 Geoffrey B. Rhoads
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:59
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/20; B42D25/23; G; G06; G06F; G06F16/00; G06F16/90; G06F16/95; G06F16/955; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06037; G06K19/06046; G06K19/08; G06K19/10; G06K19/14; G06K19/18; G06K7/00; G06K7/10; G06K7/14; G06K7/1404; G06K7/1408; G06K7/1417; G06K7/1439; G06K7/1447; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/38; G06Q20/40; G06Q20/401; G06Q20/4014; G06Q20/40145; G06T; G06T1/00; G06T1/0021; G06T1/005; G06V; G06V20/00; G06V20/80; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/25; G07C9/253; G07D; G07D7/00; G07D7/003; G07D7/0032; G07D7/0034; G07D7/004; G07D7/0047; G07D7/005; G07D7/20; G07D7/2016; G07D7/202; G07D7/2033; G07F; G07F17/00; G07F17/16; G07F7/00; G07F7/08; G07F7/086; G07F7/10; G07F7/1008; G07F7/1016; G07F7/12; G07F7/122; G10; G10L; G10L19/00; G10L19/018; G11; G11B; G11B20/00; G11B20/00086; G11B20/00094; G11B20/00115; G11B20/00166; G11B20/00181; G11B20/0021; G11B20/00884; G11B20/00891; H; H04; H04B; H04B1/00; H04B1/66; H04B1/665; H04N; H04N1/00; H04N1/00002; H04N1/00005; H04N1/00026; H04N1/00037; H04N1/00071; H04N1/00074; H04N1/00079; H04N1/32; H04N1/32101; H04N1/32144; H04N1/32149; H04N1/32154; H04N1/3216; H04N1/32203; H04N1/32208; H04N1/32251; H04N1/32288; H04N1/32352; H04N19/00; H04N19/46; H04N19/467; H04N21/00; H04N21/20; H04N21/23; H04N21/238; H04N21/2389; H04N21/23892; H04N21/80; H04N21/83; H04N21/835; H04N21/8358; H04N5/00; H04N5/76; H04N5/91; H04N5/913; B42D25/30; B42D25/309; G06K2019/06215; G06K2019/06253; G06T2201/00; G06T2201/005; G06T2201/0052; G06T2201/0064; G06T2201/0065; G07C2209/00; G07C2209/40; G07C2209/41; H04N2005/91307; H04N2005/91321; H04N2005/91335; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3204; H04N2201/3205; H04N2201/3207; H04N2201/3225; H04N2201/3226; H04N2201/3233; H04N2201/3269; H04N2201/327; H04N2201/3271; H04N2201/3274; H04N2201/328
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
94 words
Apparatus comprising: an authenticator which obtains first information corresponding to a document to be constructed into an analog form, the first information also being obtainable from a first portion of the analog form; and an incorporator which steganographically incorporates the first information in a portion of a digital representation of the document, the first information also being obtainable from a second portion of the analog form, the first information being obtainable with visible light scanning of the second portion of the analog form, the second portion corresponding to the portion of the digital representation.
Claim 2
Dependent Claim
94 words
Apparatus comprising: an authenticator which obtains first information corresponding to a document to be constructed into an analog form, the first information also being obtainable from a first portion of the analog form; and an incorporator which steganographically incorporates the first information in a portion of a digital representation of the document, the first information also being obtainable from a second portion of the analog form, the first information being obtainable with visible light scanning of the second portion of the analog form, the second portion corresponding to the portion of the digital representation.
Claim 3
Dependent Claim
25 words
The apparatus set forth in claim 1 wherein: the digital representation includes items of data, each item has more significant components and less significant components.
Claim 4
Dependent Claim
20 words
The apparatus set forth in claim 2 wherein: the items are pixels and the components are bits in the pixels.
Claim 5
Dependent Claim
22 words
The apparatus set forth in claim 2 wherein: the items are signal samples and the components are bits in the signal samples.
Claim 6
Dependent Claim
63 words
A physical document comprising a machine-detectable signal, the signal being detectable by collecting visible light image data associated with the document and transforming the image data to a complementary domain to generate transform data based on a Fourier transform, wherein presence of a telltale pattern in the transform data indicates a presence of the signal, the signal or pattern corresponding to an action.
Claim 7
Dependent Claim
63 words
A physical document comprising a machine-detectable signal, the signal being detectable by collecting visible light image data associated with the document and transforming the image data to a complementary domain to generate transform data based on a Fourier transform, wherein presence of a telltale pattern in the transform data indicates a presence of the signal, the signal or pattern corresponding to an action.
Claim 8
Dependent Claim
12 words
The physical document of claim 5 wherein the document comprises legal tender.
Claim 9
Dependent Claim
13 words
The physical document of claim 5 wherein the document comprises an identification document.
Claim 10
Dependent Claim
14 words
The physical document of claim 7 wherein the identification document comprises a photo-identification document.
Claim 11
Dependent Claim
13 words
The physical document of claim 5 wherein the action comprises a copy restriction.
Claim 12
Dependent Claim
70 words
A physical document comprising a machine-detectable hidden signal, where presence of the hidden signal is determined by collecting visible light image data associated with the document and transforming the image data to a complementary domain to generate transform data, where presence of a telltale pattern in the transform data indicates a presence of the hidden signal, the hidden signal is associated with a type or status of the physical document.
Claim 13
Dependent Claim
70 words
A physical document comprising a machine-detectable hidden signal, where presence of the hidden signal is determined by collecting visible light image data associated with the document and transforming the image data to a complementary domain to generate transform data, where presence of a telltale pattern in the transform data indicates a presence of the hidden signal, the hidden signal is associated with a type or status of the physical document.
Claim 14
Dependent Claim
12 words
The physical document of claim 10 wherein the type comprises: legal tender.
Claim 15
Dependent Claim
13 words
The physical document of claim 10 wherein the type comprises: an identification document.
Claim 16
Dependent Claim
14 words
The physical document of claim 12 wherein the identification document comprises a photo-identification document.
Claim 17
Dependent Claim
13 words
The physical document of claim 10 wherein the status comprises: do not copy.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2011-03-25 | 2011-09-24 | 2012-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-03-25 | 2015-09-24 | 2016-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-03-25 | 2019-09-24 | 2020-03-25 | $7700.00 | Window Closed / Lapsed |