0651554-A1 is referenced by 340 patents and cites 2 patents.

An image processing technique is described in the context of a hierarchical image storage and retrieval system. The method allows for the controlled addition and removal of digital watermarks from selected image components in the hierarchy. The method adds a digital watermark in a selected image resolution component and the means to remove it in an additional image component termed the watermark removal component. The method employs the encryption of the watermark removal component, and decryption with a special key, or password during authorized retrieval. This technique allows users of a distributed system the convenience of providing the entire image hierarchy on a single storage medium permitting images containing watermarks to be accessed without restriction for browsing and proofing, while the watermark removal requires knowledge and us of a controlled code.

Title
Method and apparatus for the addition and removal of digital watermarks in a hierarchical image storage and retrieval system.
Application Number
EP19940420293 19941025
Publication Number
0651554 (A1)
Application Date
October 25, 1994
Publication Date
May 3, 1995
Inventor
Baradar Ali R Eastman Kodak Co
US
Axman Michael Stuart Eastman K
US
Melnychuck Paul W Eastman Koda
US
Rabbani Majid Eastman Kodak Co
US
Assignee
Eastman Kodak Co
US
IPC
G06F 01/00
H04N 01/21
H04N 07/081
H04N 07/08
H04N 01/32
H04N 01/21
H03M 07/30
G09C 05/00
G06T 09/00
G06T 01/00
G06F 21/00
G06F 17/30
G06F 01/00
H04N 05/92
H04N 07/081
H04N 07/08
H04N 01/32
H04N 01/21
H03M 07/30
G09C 05/00
G06T 09/00
G06T 01/00
G06F 21/00
G06F 17/30
G06F 01/00
H04N 05/92
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