-
公开(公告)号：HU223895B1
公开(公告)日：2005-03-29
申请号：HU0100650
申请日：1997-02-13
Applicant: IBM
Inventor： MORIMOTO NORISHIGE , MAEDA JUNJI
Abstract: An objective of the present invention is to provide a method for embedding additional information into a video movie without substantially having an influence on the compression efficiency of the video movie and also without substantially causing degradation of the picture quality. ÄCONSTITUTIONÜ Specify at least one embedding region in the frame of the video movie for embedding information, and determine a type of interframe prediction of the embedding region in correspondence with information to be embedded by referring to an embedding rule where a content of data to be embedded is caused to correspond to the type of interframe prediction of the embedding region. It is desirable that the frame in which the embedding region exists is a bidirectionally predictive-coded frame.
-
公开(公告)号：DE69719922T2
公开(公告)日：2003-12-04
申请号：DE69719922
申请日：1997-11-14
Applicant: IBM
Inventor： SHIMIZU SHUICHI , NUMAO MASAYUKI , MORIMOTO NORISHIGE
IPC: H04N5/225 , G06T1/00 , H04N1/32 , H04N1/387 , H04N7/167 , H04N7/18 , H04N21/4405 , H04N21/4623 , H04N21/83 , G06T11/00
Abstract: A digital camera has means to authentication information into a photographed image for detecting the identity of the image. The authentication information supplied integrally with the image data, so that, the verifier can verify the image data without saving the authentication information. This is achieved by having a region dividing unit 24 for dividing the image into a first image region and a second image region in response to the digital signal, authentication information generating means 29 for generating authentication information from data in the first image region, encrypting means 30 for encrypting the authentication information, hiding means 25 for embedding the encrypted authentication information into the second image region by operating the data in the second image region, and region combining means 26 for combining the first image region in the image with the second image region in which the authentication information is embedded.
-
公开(公告)号：CA2220816C
公开(公告)日：2003-10-28
申请号：CA2220816
申请日：1997-11-12
Applicant: IBM
Inventor： NINOMIYA SYOITI , MORIMOTO NORISHIGE , TEZUKA SHU
IPC: G06F12/14 , G06F21/24 , G06T1/00 , G09C5/00 , H04N1/32 , H04N1/387 , H04N7/08 , H04N7/081 , H04K1/02 , H04N5/913
Abstract: To hide message information into media information in frequency space. With this, it is the objective of the present invention to provide a data hiding method which has high resistance to removal or change of message information embedded into media information and which continues to effectively maintain hidden message information even when signa l processing is performed by employing a frequency filter. In order to hide message informat ion (m) into media information (M), the frequency transform of the message information (m ) and the media information (M) are performed, and frequency spectra f1 and f2 are obt ained. Next, from the frequency spectrum f2 of the message information (m), a region cont aining feature frequency components representative of the features of the message informati on (m) in real space is extracted as the base region B. Then, n copies of the base region B are generated, and in frequency space, the n copies are dispersedly arranged. Also, by maki ng the frequency components other than that equal to zero, a frequency spectrum f3 is generat ed as intermediate information. Finally, the frequency spectrum f3 and the frequen cy spectrum f, are added, and by performing the inverse frequency transform of the result, the message information (m) can be hidden into the media information (M).
-
公开(公告)号：DE69719922D1
公开(公告)日：2003-04-24
申请号：DE69719922
申请日：1997-11-14
Applicant: IBM
Inventor： SHIMIZU SHUICHI , NUMAO MASAYUKI , MORIMOTO NORISHIGE
IPC: H04N5/225 , G06T1/00 , H04N1/32 , H04N1/387 , H04N7/167 , H04N7/18 , H04N21/4405 , H04N21/4623 , H04N21/83 , G06T11/00
Abstract: A digital camera has means to authentication information into a photographed image for detecting the identity of the image. The authentication information supplied integrally with the image data, so that, the verifier can verify the image data without saving the authentication information. This is achieved by having a region dividing unit 24 for dividing the image into a first image region and a second image region in response to the digital signal, authentication information generating means 29 for generating authentication information from data in the first image region, encrypting means 30 for encrypting the authentication information, hiding means 25 for embedding the encrypted authentication information into the second image region by operating the data in the second image region, and region combining means 26 for combining the first image region in the image with the second image region in which the authentication information is embedded.
-
75.发明专利
公开(公告)号：CA2222346C
公开(公告)日：2002-07-09
申请号：CA2222346
申请日：1997-11-27
Applicant: IBM
Inventor： NUMAO MASAYUKI , MORIMOTO NORISHIGE , SHIMIZU SHUICHI
IPC: H04N5/225 , G06T1/00 , H04N1/32 , H04N1/387 , H04N7/167 , H04N7/18 , H04N21/4405 , H04N21/4623 , H04N21/83 , H04L9/32 , H04N5/335
Abstract: The invention provides a digital camera which embeds authentication informat ion for detecting the identity of a photographed image into the image. By supplying the authentication information integrally with image data, the verifier is enabl ed to verify the image data without saving the authentication information. By converting the light inputted through an optical system 21 to an electric signal, a CCD 22 outputs an anal og signal of an image. A signal processor 23 generates a digital signal of the image is r esponse to the analog signal. A digital camera has: a region dividing unit 24 for dividing the image into a first image region and a second image region in response to the digital si gnal; authentication information generator 29 for generating authentication inform ation from data in the first image region; encryptor 30 for encrypting the authentication in formation; hiding means 25 for embedding the encrypted authentication information into the sec ond image region by operating the data in the second image region; and region combinin g means 26 for combining the first image region in the image with the second image regi on in which the authentication information is embedded.
-
Patent Agency Ranking
公开(公告)号：PL183090B1
公开(公告)日：2002-05-31
申请号：PL33270197
申请日：1997-02-13
Applicant: IBM
Inventor： MORIMOTO NORISHIGE , MAEDA JUNJI
Abstract: An objective of the present invention is to provide a method for embedding additional information into a video movie without substantially having an influence on the compression efficiency of the video movie and also without substantially causing degradation of the picture quality. ÄCONSTITUTIONÜ Specify at least one embedding region in the frame of the video movie for embedding information, and determine a type of interframe prediction of the embedding region in correspondence with information to be embedded by referring to an embedding rule where a content of data to be embedded is caused to correspond to the type of interframe prediction of the embedding region. It is desirable that the frame in which the embedding region exists is a bidirectionally predictive-coded frame.
-
公开(公告)号：CZ20010721A3
公开(公告)日：2002-05-15
申请号：CZ20010721
申请日：1998-11-25
Applicant: IBM
Inventor： KAMIJO KOICHI , SHIMIZU SHUICHI , MORIMOTO NORISHIGE
CPC classification number: G06T1/0035 , G06T2201/0052 , G06T2201/0053 , H04N7/24 , H04N19/467 , H04N21/23892 , H04N21/8358
-
公开(公告)号：CA2307534A1
公开(公告)日：2000-12-22
申请号：CA2307534
申请日：2000-05-04
Applicant: IBM
Inventor： TONEGAWA SATOKO , MORIMOTO NORISHIGE , TOYOKAWA KAZUHARU
Abstract: It is one object of the present invention to provide a contents data judging apparatus and method for accurately determining whether an exchange of contents data occurred from the time the data were produced until an alteration of the data was detected, for identifying an occasion on which the contents data may be altered, and for identifying a portion of the data that was altered. A contents data judging apparatus, which determines whether contents data prepared by a digital device were altered, comprises: (1) means for performing an authentication process using a medium on which contents data are recorded; (2) means for reading the contents data from the medium; (3) means for embedding, in the contents data, data for verifying the pertinent contents; (4) means for extracting, from the contents data, the data for verifying the pertinent contents; and (5) means for using the results of the extraction to determine whether the contents data were altered. Preferably, the means (5) includes means for, when the contents data were altered, identifying a portion containing altered data.
-
公开(公告)号：PL332701A1
公开(公告)日：1999-09-27
申请号：PL33270197
申请日：1997-02-13
Applicant: IBM
Inventor： MORIMOTO NORISHIGE , MAEDA JUNJI
Abstract: An objective of the present invention is to provide a method for embedding additional information into a video movie without substantially having an influence on the compression efficiency of the video movie and also without substantially causing degradation of the picture quality. ÄCONSTITUTIONÜ Specify at least one embedding region in the frame of the video movie for embedding information, and determine a type of interframe prediction of the embedding region in correspondence with information to be embedded by referring to an embedding rule where a content of data to be embedded is caused to correspond to the type of interframe prediction of the embedding region. It is desirable that the frame in which the embedding region exists is a bidirectionally predictive-coded frame.
-
公开(公告)号：CZ9901289A3
公开(公告)日：1999-08-11
申请号：CZ128999
申请日：1997-02-13
Applicant: IBM
Inventor： MORIMOTO NORISHIGE , MAEDA JUNJI
CPC classification number: G06T1/0085 , H04N19/00 , H04N19/467 , H04N21/23892 , H04N21/8358
-
-
-
-
-
-
-
-
-
Search Results
82
records
(took 0.02 seconds)
