Watermark system
First Claim
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1. A method for examining an electronic representation of an item for a watermark, the method comprising:
- examining at least a first electronic representation of an item for a watermark in accordance with a first watermark definition;
receiving a signal indicating that a second watermark definition is to be used for examining electronic representations; and
performing the following in response to receiving the signal;
examining at least a second electronic representation of an item for a watermark in accordance with the second watermark definition.
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Abstract
A method for examining an electronic representation of an item for a watermark, the method including examining at least a first electronic representation of an item for a watermark in accordance with a first watermark definition, receiving a signal indicating that a second watermark definition is to be used for examining electronic representations, and examining at least a second electronic representation of an item for a watermark in accordance with the second watermark definition. Related apparatus and methods are also provided.
27 Citations
27 Claims
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1. A method for examining an electronic representation of an item for a watermark, the method comprising:
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examining at least a first electronic representation of an item for a watermark in accordance with a first watermark definition;
receiving a signal indicating that a second watermark definition is to be used for examining electronic representations; and
performing the following in response to receiving the signal;
examining at least a second electronic representation of an item for a watermark in accordance with the second watermark definition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A watermark examiner for examining an electronic representation of an item for a watermark, the examiner comprising:
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a watermark definition store operative to store a watermark definition;
watermark examination apparatus operatively associated with the watermark definition store and operative to examine an electronic representation of an item for a watermark in accordance with the watermark definition stored in the watermark definition store; and
a watermark definition signal receiver operative to receive a signal indicating that a new watermark definition is to be used for examining electronic representations and to store the new watermark definition in the watermark definition store, wherein the watermark examination apparatus is operative to examine the electronic representation of an item for a watermark in accordance with the new watermark definition in response to receipt of the signal by the watermark definition signal receiver. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for altering an electronic representation of an item having a watermark, the method comprising:
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providing a first electronic representation of an item, the first electronic representation comprising a first watermark, the first watermark corresponding to a first watermark definition;
receiving a signal indicating that a second watermark definition is to be used, and performing the following in response to receiving the signal;
altering the first electronic representation to comprise a second watermark corresponding to the second watermark definition. - View Dependent Claims (18, 19, 20, 21)
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22. A watermark alteration system for altering an electronic representation of an item having a watermark, the system comprising:
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a watermark definition signal receiver for receiving a signal indicating that a second watermark definition is to be used; and
watermark alteration apparatus for altering a first electronic representation, the first electronic representation comprising a first watermark corresponding to a first watermark definition, to comprise a second watermark corresponding to the second watermark definition, wherein the watermark alteration apparatus is operative to alter the first electronic representation to comprise a second watermark corresponding to the second watermark definition in response to receipt of the signal by the watermark definition signal receiver. - View Dependent Claims (23, 24, 25, 26)
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27-28. -28. (canceled)
Specification