Patent US6608919B1 successfully refreshed from Google Patents.
US6608919B1
Expired / Lapsed
US
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Method and apparatus for encoding paper with information
Assignee: Digimarc Corp
•
Filing: 2000-02-29
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Granted: 2003-08-19
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Expires: 2020-02-29
Abstract
Abstract Paper is textured with a pattern that yields a known signature signal when transformed to the frequency domain. This signature can be used for various purposes, including determining the angular orientation of the paper when scanned, conveying a plural-bit digital watermark, and for simple document recognition purposes (e.g., photocopiers that refuse to reproduce banknotes). The texturing can be effected during the paper-making process, e.g., by shaping the surface of a de-watering element accordingly.
Inventors
- 👤 Adnan M. Alattar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:05
CPC Classifications
D; D21; D21F; D21F9/00; D21F11/00; G; G03; G03G; G03G21/00; G03G21/04; G03G21/046; G06; G06T; G06T1/00; G06T1/0021; G06T2201/00; G06T2201/005; G06T2201/0052
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
63 words
A method of determining a transformation of a paper document including: optically scanning the paper document to generate scan data; transforming the scan data to a frequency domain; identifying frequency components in the transformed scan data corresponding to texture resulting from the paper's manufacture; and determining from said frequency components one or more possible transformations of the scanned documents from a reference state.
Claim 2
Independent Claim
63 words
A method of determining a transformation of a paper document including: optically scanning the paper document to generate scan data; transforming the scan data to a frequency domain; identifying frequency components in the transformed scan data corresponding to texture resulting from the paper's manufacture; and determining from said frequency components one or more possible transformations of the scanned documents from a reference state.
Claim 3
Dependent Claim
22 words
The method of claim 1 that includes determining from said frequency components a rotation of the scanned document from a reference orientation.
Claim 4
Dependent Claim
22 words
The method of claim 1 that includes determining from said frequency components a scale of the scanned document from a reference scale.
Claim 5
Dependent Claim
22 words
The method of claim 1 that includes determining from said frequency components a translation of the scanned document from a reference translation.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein the texture results from a de-watering element used in the paper's manufacture.
Claim 7
Independent Claim
52 words
A method including: optically scanning a paper document to generate scan data; transforming the scan data to a frequency domain; identifying frequency components in the transformed scan data corresponding to texture resulting from the paper's manufacture; and interpreting said identified frequency components to yield payload data including at least a registration indicator.
Claim 8
Independent Claim
52 words
A method including: optically scanning a paper document to generate scan data; transforming the scan data to a frequency domain; identifying frequency components in the transformed scan data corresponding to texture resulting from the paper's manufacture; and interpreting said identified frequency components to yield payload data including at least a registration indicator.
Claim 9
Dependent Claim
22 words
The method of claim 6 that includes determining from the registration indicator a rotation of the scanned document from a reference orientation.
Claim 10
Dependent Claim
22 words
The method of claim 6 that includes determining from the registration indicator a scale of the scanned document from a reference scale.
Claim 11
Dependent Claim
22 words
The method of claim 6 that includes determining from the registration indicator a translation of the scanned document from a reference translation.
Claim 12
Dependent Claim
18 words
The method of claim 6 wherein the texture results from a de-watering element used in the paper's manufacture.
Claim 13
Dependent Claim
68 words
A paper-making process including: defining a frequency-domain signal, wherein the frequency-domain signal comprises an orientation component; inverse transforming the frequency-domain signal to yield a two-dimensional pattern in the spatial domain; shaping an element of the paper-making apparatus in accordance with said spatial domain pattern; and imparting said pattern to a paper surface, wherein the orientation component provides an orientation reference for paper made according to said paper-making process.
Claim 14
Dependent Claim
68 words
A paper-making process including: defining a frequency-domain signal, wherein the frequency-domain signal comprises an orientation component; inverse transforming the frequency-domain signal to yield a two-dimensional pattern in the spatial domain; shaping an element of the paper-making apparatus in accordance with said spatial domain pattern; and imparting said pattern to a paper surface, wherein the orientation component provides an orientation reference for paper made according to said paper-making process.
Claim 15
Dependent Claim
60 words
A printing process using paper made according to the method of claim 11 , the printing process comprising: aligning printing on the paper so as to be oriented in a predetermined manner with respect to the pattern on the paper surface, wherein transforming optical scan data corresponding to said pattern into a frequency domain reveals an orientation of the paper.
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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) | 2006-08-18 | 2007-02-17 | 2007-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-08-18 | 2011-02-17 | 2011-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-08-18 | 2015-02-17 | 2015-08-19 | $7700.00 | Window Closed / Lapsed |