Embedding information in digital image data
First Claim
Patent Images
1. A data processing apparatus, comprising:
- a first embedding unit adapted to embed first information in digital image data in accordance with a first embedding method which utilizes publicly available information; and
a second embedding unit adapted to embed second information in the digital image data having the first information embedded therein in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered.
1 Assignment
0 Petitions
Accused Products
Abstract
A data processing apparatus has a first embedding unit adapted to embed first information in digital image data in accordance with a first embedding method which utilizes publicly available information. The apparatus also has a second embedding unit adapted to embed second information in the digital image data having the first information embedded therein in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered.
120 Citations
48 Claims
-
1. A data processing apparatus, comprising:
-
a first embedding unit adapted to embed first information in digital image data in accordance with a first embedding method which utilizes publicly available information; and
a second embedding unit adapted to embed second information in the digital image data having the first information embedded therein in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A data processing method, comprising the steps of:
-
embedding first information in digital image data in accordance with a first embedding method which utilizes publicly available information; and
embedding second information in the digital image data having the first information embedded therein in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A data processing apparatus comprising:
-
a first extracting unit adapted to extract first information from digital image data, the first information being embedded in the digital image data in accordance with a first embedding method which utilizes publicly available information; and
a second extracting unit adapted to extract second information from the digital image data, the second information being embedded in the digital image data in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
-
25. A data processing method comprising the steps of:
-
extracting first information from digital image data, the first information being embedded in the digital image data in accordance with a first embedding method which utilizes publicly available information; and
extracting second information from the digital image data, the second information being embedded in the digital image data in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered. - View Dependent Claims (27, 28, 29, 30, 31, 32)
-
-
26. A data processing method according to clam 17, wherein said first extracting step extracts the first information in a first area of the digital image data, and wherein said second extracting step extracts the second information in a second area of the digital image data.
-
33. A storage medium storing a program for performing a data processing method, the program comprising the steps of:
-
embedding first information in digital image data in accordance with a first embedding method which utilizes publicly available information; and
embedding second information in the digital image data having the first information embedded therein in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
said second embedding step embeds the first information in the digital image data invisibly, and wherein said second embedding step embeds the second information in the digital image data invisibly.
-
-
41. A storage medium storing a program for performing a data processing method, the program comprising the steps of:
-
extracting first information from digital image data, the first information being embedded in the digital image data in accordance with a first embedding method which utilizes publicly available information; and
extracting second information from the digital image data, the second information being embedded in the digital image data in accordance with a second embedding method which utilizes secret information that is not made publicly available, the second information being used to detect whether the first information is altered. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48)
-
Specification