US6567534B1
Expired / Lapsed
US
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Methods and systems for watermark processing of line art images
Assignee: Digimarc Corp
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Filing: 2000-07-27
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Granted: 2003-05-20
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Expires: 2020-07-27
Abstract
Abstract Binary data is embedded in banknote artwork, permitting later recovery by, and control of, compliant devices that may encounter banknote image data, such as photocopiers, scanners, and printers. One embedding method involves providing nominal line art for the banknote, and imposing a virtual grid of points over the art, thereby defining plural regions. The luminance of at least certain of these regions is changed to effect encoding of the binary data. The luminance may be changed, e.g., by changing the width or spacing of the artwork lines, or by introducing new lines into the artwork.
Inventors
- 👤 Geoffrey B. Rhoads
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:10
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00838; H04N1/0084; H04N1/00843; H04N1/00846; B; B42; B42D; B42D25/00; B42D25/20; B42D25/29; G; G06; G06T; G06T1/00; G06T1/0021; G06T1/0028; G06T1/005; G06T1/0064; G06T1/0071; G06T7/00; G06T7/0002; G07; G07D; G07D7/00; G07D7/003; G07D7/0034; G07D7/004; G10; G10L; G10L19/00; G10L19/018; H04N1/00002; H04N1/00005; H04N1/00026; H04N1/00037; H04N1/00092; H04N1/00127; H04N1/00204; H04N1/00244; H04N1/00856; H04N1/00859; H04N1/00864; H04N1/00867; H04N1/0087; H04N1/00875; H04N1/32; H04N1/32101; H04N1/32144; H04N1/32149; H04N1/32203; H04N1/32208; H04N1/32219; H04N1/32261; H04N1/32288; H04N1/32304; H04N1/32309; B29; B29C; B29C45/00; B29C45/14; B29C45/1418; G06T2201/00; G06T2201/005; G06T2201/0051; G06T2201/0065; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3204; H04N2201/3205; H04N2201/3207; H04N2201/3225; H04N2201/3226; H04N2201/3233; H04N2201/3239; H04N2201/3246; H04N2201/3249; H04N2201/3269; H04N2201/327; H04N2201/3271; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A method of embedding binary data in a banknote, comprising: providing nominal line art for the banknote; imposing a virtual grid of points over at least an excerpt of said line art, each of said points having a region associated therewith; and changing a luminance value of plural of said regions to embed binary data therein, wherein said changes are not apparent to a human viewer of the banknote, yet can be detected from visible light scan data corresponding to said banknote.
Claim 2
Independent Claim
82 words
A method of embedding binary data in a banknote, comprising: providing nominal line art for the banknote; imposing a virtual grid of points over at least an excerpt of said line art, each of said points having a region associated therewith; and changing a luminance value of plural of said regions to embed binary data therein, wherein said changes are not apparent to a human viewer of the banknote, yet can be detected from visible light scan data corresponding to said banknote.
Claim 3
Dependent Claim
10 words
A banknote produced by the process of claim 1 .
Claim 4
Independent Claim
68 words
A method of embedding binary data in a banknote, comprising: providing nominal line art for the banknote; imposing a virtual grid of points over at least an excerpt of said line art, each of said points having a region associated therewith; and changing a luminance value of plural of said regions to embed binary data therein by modulating the width of plural lines in said line art imagery.
Claim 5
Independent Claim
68 words
A method of embedding binary data in a banknote, comprising: providing nominal line art for the banknote; imposing a virtual grid of points over at least an excerpt of said line art, each of said points having a region associated therewith; and changing a luminance value of plural of said regions to embed binary data therein by modulating the width of plural lines in said line art imagery.
Claim 6
Dependent Claim
10 words
A banknote produced by the process of claim 3 .
Claim 7
Independent Claim
68 words
A method of embedding binary data in a banknote, comprising: providing nominal line art for the banknote; imposing a virtual grid of points over at least an excerpt of said line art, each of said points having a region associated therewith; and changing a luminance value of plural of said regions to embed binary data therein by modulating the position of plural lines in said line art imagery.
Claim 8
Independent Claim
68 words
A method of embedding binary data in a banknote, comprising: providing nominal line art for the banknote; imposing a virtual grid of points over at least an excerpt of said line art, each of said points having a region associated therewith; and changing a luminance value of plural of said regions to embed binary data therein by modulating the position of plural lines in said line art imagery.
Claim 9
Dependent Claim
10 words
A banknote produced by the process of claim 5 .
Claim 10
Independent Claim
64 words
A method of embedding binary data in a banknote, comprising: providing nominal line art for the banknote; imposing a virtual grid of points over at least an excerpt of said line art, each of said points having a region associated therewith; and changing a luminance value of plural of said regions to embed binary data therein by inserting new lines in said line art.
Claim 11
Independent Claim
64 words
A method of embedding binary data in a banknote, comprising: providing nominal line art for the banknote; imposing a virtual grid of points over at least an excerpt of said line art, each of said points having a region associated therewith; and changing a luminance value of plural of said regions to embed binary data therein by inserting new lines in said line art.
Claim 12
Dependent Claim
10 words
A banknote produced by the process of claim 7 .
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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) | 2006-05-19 | 2006-11-18 | 2007-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-05-19 | 2010-11-18 | 2011-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-05-19 | 2014-11-18 | 2015-05-20 | $7700.00 | Window Closed / Lapsed |