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US6005936A
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System for embedding authentication information into an image and an image alteration detecting system
Assignee: International Business Machines Corp
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Filing: 1997-08-25
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Granted: 1999-12-21
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Expires: 2017-08-25
Abstract
Abstract A digital camera for embedding authentication information to detect the identity of a photographed image into an image. By supplying the authentication information integrally with image data, the verifier is enabled to verify the image data without saving the authentication information. Particularly, by converting the light inputted through an optical system to an electric signal, a CCD outputs an analog signal of an image which is converted to a digital signal. In response to the digital signal of the image, a digital camera having a region dividing unit divides the digital image into first and second regions. Authentication information is generated from data in the first region, which information is then encrypted. The encrypted authentication information is embedded into the second image region. The first and second image regions are then combined.
Inventors
- 👤 Shuichi Shimizu
- 👤 Masayuki Numao
- 👤 Norishige Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:52
CPC Classifications
G; G06; G06T; G06T1/00; G06T1/0021; G06T1/0028; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/913; H04N1/00; H04N1/32; H04N1/32101; H04N1/32144; G06T2201/00; G06T2201/005; G06T2201/0065; H04N2005/91307; H04N2005/91335; H04N2005/91342; H04N2101/00; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3225; H04N2201/3233; H04N2201/3236; H04N2201/3269; H04N2201/327; H04N2201/328; H04N2201/3281
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
93 words
A system for embedding authentication information into an image, said system comprising: a region dividing unit for dividing the image into a first image region and a second image region; an authentication information generating unit for generating authentication information from data in said first image region; a hiding unit for embedding said authentication information into said second image region by operating data in said second image region; and a region combining unit for combining said first image region in said image with said second image region in which said authentication information is embedded.
Claim 2
Independent Claim
93 words
A system for embedding authentication information into an image, said system comprising: a region dividing unit for dividing the image into a first image region and a second image region; an authentication information generating unit for generating authentication information from data in said first image region; a hiding unit for embedding said authentication information into said second image region by operating data in said second image region; and a region combining unit for combining said first image region in said image with said second image region in which said authentication information is embedded.
Claim 3
Dependent Claim
22 words
A system as set forth in claim 1 wherein said authentication information is a digest of data in said first image region.
Claim 4
Dependent Claim
22 words
A system as set forth in claim 2 wherein said digest is a hash value of data in said first image region.
Claim 5
Dependent Claim
32 words
A system as set forth in claim 1 further comprising an encrypting unit for encrypting said authentication information, wherein said hiding unit embeds said encrypted authentication information into said second image region.
Claim 6
Dependent Claim
92 words
An image alteration detecting system comprising: a region identifying unit for identifying a first image region and a second image region in an image, said second image region including information embedded by operating data; an authentication information generating unit for generating first authentication information from data in said first image region; an extracting unit for extracting second authentication information from said second image region; and an alteration detecting unit for determining, if said first authentication information is the same as said second authentication information, that there is no alteration in said image.
Claim 7
Dependent Claim
92 words
An image alteration detecting system comprising: a region identifying unit for identifying a first image region and a second image region in an image, said second image region including information embedded by operating data; an authentication information generating unit for generating first authentication information from data in said first image region; an extracting unit for extracting second authentication information from said second image region; and an alteration detecting unit for determining, if said first authentication information is the same as said second authentication information, that there is no alteration in said image.
Claim 8
Dependent Claim
35 words
A system as set forth in claim 5 wherein said alteration detecting unit determines, if said first authentication information is not the same as said second authentication information that there is alteration in said image.
Claim 9
Dependent Claim
22 words
A system as set forth in claim 6 wherein said digest is a hash value of data in said first image region.
Claim 10
Dependent Claim
23 words
A system as set forth in claim 5 wherein said first authentication information is a digest of data in said first image region.
Claim 11
Dependent Claim
56 words
A system as set forth in claim 5 wherein said second authentication information is encrypted information, said system further comprising a decoding unit for decoding said second authentication information, wherein said alteration detecting unit determines, if said decoded authentication information is the same as said first authentication information, that there is no alteration in said image.
Claim 12
Independent Claim
76 words
A method for embedding authentication information into an image, said method comprising the steps of: dividing the image into a first image region and a second image region; generating authentication information from data in said first image region; embedding said authentication information into said second image region by operating data in said second image region; and combining said first image region in said image with said second image region in which said authentication information is embedded.
Claim 13
Independent Claim
76 words
A method for embedding authentication information into an image, said method comprising the steps of: dividing the image into a first image region and a second image region; generating authentication information from data in said first image region; embedding said authentication information into said second image region by operating data in said second image region; and combining said first image region in said image with said second image region in which said authentication information is embedded.
Claim 14
Independent Claim
84 words
A method for detecting the identity of an image comprising the steps of: identifying a first image region and a second image region in the image said second image region including information embedded by operating data in said second image region; generating first authentication information from data in said first image region; extracting second authentication information from said second image region; and determining, if said first authentication information is the same as said second authentication information, that there is no alteration in said image.
Claim 15
Independent Claim
84 words
A method for detecting the identity of an image comprising the steps of: identifying a first image region and a second image region in the image said second image region including information embedded by operating data in said second image region; generating first authentication information from data in said first image region; extracting second authentication information from said second image region; and determining, if said first authentication information is the same as said second authentication information, that there is no alteration in said image.
Claim 16
Dependent Claim
146 words
A digital camera comprising: an optical system; a converter for converting the light inputted through said optical system to an electric signal so as to output an analog signal of an image; a signal processing unit for generating a digital signal of the image in response to said analog signal; a region dividing unit for dividing the image into a first image region and a second image region in response to said digital signal; an authentication information generating unit for generating authentication information from data in said first image region; an encrypting unit for encrypting said authentication information; a hiding unit for embedding the encrypted authentication information into said second image region by operating data in said second image region; and a region combining unit for combining said first image region in said image with said second image region in which said authentication information is embedded.
Claim 17
Dependent Claim
146 words
A digital camera comprising: an optical system; a converter for converting the light inputted through said optical system to an electric signal so as to output an analog signal of an image; a signal processing unit for generating a digital signal of the image in response to said analog signal; a region dividing unit for dividing the image into a first image region and a second image region in response to said digital signal; an authentication information generating unit for generating authentication information from data in said first image region; an encrypting unit for encrypting said authentication information; a hiding unit for embedding the encrypted authentication information into said second image region by operating data in said second image region; and a region combining unit for combining said first image region in said image with said second image region in which said authentication information is embedded.
Claim 18
Dependent Claim
24 words
A digital camera as set forth in claim 12 wherein said authentication information is a hash value of data in said first image region.
References Cited (Backward Citations)
JPH08159330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-12-20 | 2003-06-21 | 2003-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-20 | 2007-06-21 | 2007-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-20 | 2011-06-21 | 2011-12-21 | $7700.00 | Window Closed / Lapsed |