EP0766449A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Copy protection system
Assignee: Eastman Kodak Co
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Filing: 1996-09-11
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Granted: —
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Expires: 2016-09-11
Abstract
Abstract A method for determining the presence of a color symbol on a document with the determination being usable in a copy system for controlling the copying of the document, comprising the steps of: a) incorporating a color symbol having a selected color in a document that is not to be copied; b) computing the selected color content of the document; and c) determining the presence of the color symbol on a document by the amount of the selected color content on the document.
Inventors
- 👤 Jay Stuart C/O Eastman Kodak Co. Schildkraut
- 👤 James Edward c/o Eastman Kodak Co. Sutton
- 👤 Hsue-Yang c/o Eastman Kodak Co. Liu
- 👤 Robert Terry c/o Eastman Kodak Co. Gray
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 14:07
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00838; H04N1/0084; H04N1/00843; H04N1/00846; H04N1/00856; H04N1/00875; H04N9/00; H04N9/44; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3271
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A method for determining the presence of a color symbol on a document with the determination being usable in a copy system for controlling the copying of the document, comprising the steps of: a) incorporating a color symbol having a selected color in a document that is not to be copied; b) computing the selected color content of the document; and c) determining the presence of the color symbol on a document by the amount of the selected color content on the document.
Claim 2
Independent Claim
103 words
A method for determining the presence of a symbol on a document with the determination being usable in a copy system for controlling the copying of the document, comprising the steps of: a) incorporating a color symbol having a selected color and shape in a document that is not to be copied; b) digitizing the document and the incorporating color symbol; c) computing the selected color content of the digitized document; and d) determining the presence of a color symbol on the document by matching the degree of the selected color on the digitized document with the shape of the selected color symbol.
Claim 3
Dependent Claim
38 words
The method according to Claim 2 wherein the color symbol is applied to the document by heating a colored foil and pressing the foil onto the document with a stamp having the shape of the selected color symbol.
Claim 4
Dependent Claim
16 words
The method according to Claim 2 wherein the color symbol is shaped as a copyright symbol.
Claim 5
Dependent Claim
17 words
The method according to Claim 2 wherein the selected color of the symbol is gold or silver.
Claim 6
Dependent Claim
29 words
The method of Claim 2 wherein the presence of a color symbol is determined by averaging the occurrences of the selected color over individual regions representative of the symbol.
Claim 7
Dependent Claim
20 words
The method according to Claim 6 wherein the individual regions are selected by overlaying a bit map of the regions.
References Cited (Backward Citations)
No citation records indexed.
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