Inferring object status based on detected watermark data
First Claim
Patent Images
1. A method to analyze an object, wherein an original or authentic object includes both a first watermark and a second different watermark, said method comprising:
- attempting to detect first and second watermarks from an object;
if the first and second watermarks are both detected, reaching a first conclusion concerning the object; and
if the first watermark is detected but not the second, reaching a second, different, conclusion concerning the object.
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Abstract
Image, video, or audio data is encoded with both a frail and a robust watermark. The two watermarks respond differently to different forms of processing (e.g., copying the object may render the frail watermark unreadable), permitting an original object to be distinguished from a processed object. Appropriate action can then taken in response thereto.
264 Citations
30 Claims
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1. A method to analyze an object, wherein an original or authentic object includes both a first watermark and a second different watermark, said method comprising:
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attempting to detect first and second watermarks from an object; if the first and second watermarks are both detected, reaching a first conclusion concerning the object; and if the first watermark is detected but not the second, reaching a second, different, conclusion concerning the object. - View Dependent Claims (2, 3, 8, 9, 10, 25, 26)
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4. A method comprising:
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receiving a set of sampled data, wherein original or authentic data comprises a plurality of different watermarks; analyzing said set of sampled data for watermark information, wherein the watermark information comprises first watermark information and second watermark information; and based on a result of said analysis, concluding that the sampled data does not correspond to an original. - View Dependent Claims (5, 6, 7, 27, 28)
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11. A security document comprising:
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a substrate; printing on the substrate, wherein the printing comprises at least a first digital watermark and a second digital watermark, and wherein the first digital watermark and the second digital watermark cooperate to yield an authentication clue concerning the security document. - View Dependent Claims (12, 14, 15, 16, 17, 29, 30)
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13. A method comprising;
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attempting to detect first and second watermarks from an object, wherein the first watermark is designed to withstand a predetermined process, and the second watermark is not, and wherein the predetermined process comprises at least one of scanning and reprinting; if the first and second watermarks are both detected, reaching a first conclusion concerning the object; and if the first watermark is detected but not the second, reaching a second, different, conclusion concerning the object.
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18. A security document comprising:
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a substrate; and printing on the substrate, wherein the printing comprises at least a first digital watermark and a second digital watermark in a predetermined relationship, and wherein the first digital watermark and the second digital watermark comprise the predetermined relationship to help enable authentication of the security document. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification