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1. 发明申请

WO03003276A9 METHOD AND SYSTEM FOR WATERMARKING AN ELECTRICALLY DEPICTED IMAGE 审中-公开
公开(公告)号：WO03003276A9
公开(公告)日：2003-12-04
申请号：PCT/US0216600
申请日：2002-06-28
申请人： OKI ELECTRIC IND CO LTD , UNIV COLUMBIA , MAENO KURATO , SUN QIBIN , CHANG SHIH-FU , SUTO MASAYUKI
发明人： MAENO KURATO , SUN QIBIN , CHANG SHIH-FU , SUTO MASAYUKI
IPC分类号： G06K9/00 , G06K9/36 , G06T1/00 , H04N1/387 , H04N1/41 , H04K1/00
CPC分类号： G06T1/005 , G06T1/0078 , G06T2201/0052 , G06T2201/0065
摘要： A system for watermarking (222) an image file selects coefficients using a selection procedure that is kept secret, and assigns the selected coefficients to coefficient pairs. To detect an unauthorized alteration after the image file has been watermarked, coefficient pairs are selected using the same secret procedure that was originally used to generate the raw signature (418) values. The raw signature values may be grouped into sets, which are mapped onto shortened signature (422) codes having reduced number of bits.

2. 发明申请

WO03030541A2 METHOD AND APPARATUS FOR WATERMARKING AND AUTHENTICATING DATA 审中-公开
标题翻译：用于水印和认证数据的方法和装置
公开(公告)号：WO03030541A2
公开(公告)日：2003-04-10
申请号：PCT/US0231488
申请日：2002-10-03
申请人： UNIV COLUMBIA , SUN QIBIN , CHANG SHIH-FU , MAENO KURATO , SUTO MASAYUKI
发明人： SUN QIBIN , CHANG SHIH-FU , MAENO KURATO , SUTO MASAYUKI
IPC分类号： G06T1/00 , H04N1/32 , H04N7/26 , H04N7/16
CPC分类号： H04N19/467 , G06T1/0028 , G06T2201/0052 , G06T2201/0202 , H04N1/32154 , H04N1/3217
摘要： A method and apparatus for watermarking and authenticating data. Features codes are derived from multimedia data (e.g., image data) and used to derive a quasi-random watermark and an encrypted signature. In two stages of watermarking, the quasi-random watermark and the signature are embedded in the multimedia data to derive watermarked data. In an authentication procedure, the watermarked data are authenticated by newly deriving the feature codes, extracting the watermarks, and determining whether the extracted watermarks correspond to the newly derived feature codes. In addition, the embedded signature is extracted from the data and decrypted. The newly derived feature codes are used to derive data which is compared to the decrypted signature. The user of the above procedures can select a desired authentication strength based upon the percentage of the multimedia data used to derive the feature codes.
摘要翻译：一种用于水印和认证数据的方法和装置。特征码从多媒体数据（例如，图像数据）导出并用于导出准随机水印和加密签名。在水印的两个阶段中，将准随机水印和签名嵌入在多媒体数据中以得到水印数据。在认证过程中，通过新推出特征码，提取水印，以及确定所提取的水印是否对应于新导出的特征码，来对水印数据进行认证。另外，从数据中提取嵌入的签名并进行解密。新派生的特征码用于导出与解密的签名进行比较的数据。上述过程的用户可以基于用于导出特征码的多媒体数据的百分比来选择期望的认证强度。

3. 发明申请

WO2003003276A3 METHOD AND SYSTEM FOR WATERMARKING AN ELECTRICALLY DEPICTED IMAGE 审中-公开
公开(公告)号：WO2003003276A3
公开(公告)日：2003-01-09
申请号：PCT/US2002/016600
申请日：2002-06-28
申请人： OKI ELECTRIC INDUSTRY CO., LTD. , THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK , MAENO, Kurato , SUN, Qibin , CHANG, Shih-Fu , SUTO, Masayuki
发明人： MAENO, Kurato , SUN, Qibin , CHANG, Shih-Fu , SUTO, Masayuki
IPC分类号： G06K9/00
摘要： A system for watermarking (222) an image file selects coefficients using a selection procedure that is kept secret, and assigns the selected coefficients to coefficient pairs. To detect an unauthorized alteration after the image file has been watermarked, coefficient pairs are selected using the same secret procedure that was originally used to generate the raw signature (418) values. The raw signature values may be grouped into sets, which are mapped onto shortened signature (422) codes having reduced number of bits.

4. 发明申请

WO2003030541A3 METHOD AND APPARATUS FOR WATERMARKING AND AUTHENTICATING DATA 审中-公开
公开(公告)号：WO2003030541A3
公开(公告)日：2003-04-10
申请号：PCT/US2002/031488
申请日：2002-10-03
申请人： THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK , SUN, Qibin , CHANG, Shih-Fu , MAENO, Kurato , SUTO, Masayuki
发明人： SUN, Qibin , CHANG, Shih-Fu , MAENO, Kurato , SUTO, Masayuki
IPC分类号： H04N1/32
摘要： A method and apparatus for watermarking and authenticating data. Features codes are derived from multimedia data (e.g., image data) and used to derive a quasi-random watermark and an encrypted signature. In two stages of watermarking, the quasi-random watermark and the signature are embedded in the multimedia data to derive watermarked data. In an authentication procedure, the watermarked data are authenticated by newly deriving the feature codes, extracting the watermarks, and determining whether the extracted watermarks correspond to the newly derived feature codes. In addition, the embedded signature is extracted from the data and decrypted. The newly derived feature codes are used to derive data which is compared to the decrypted signature. The user of the above procedures can select a desired authentication strength based upon the percentage of the multimedia data used to derive the feature codes.

5. 发明申请

WO2003003285A1 METHOD AND SYSTEM FOR WATERMARKING AN ELECTRICALLY DEPICTED IMAGE 审中-公开
标题翻译：用于水印电气识别图像的方法和系统
公开(公告)号：WO2003003285A1
公开(公告)日：2003-01-09
申请号：PCT/US2002/016599
申请日：2002-06-28
申请人： OKI ELECTRIC INDUSTRY CO., LTD. , THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK , MAENO, Kurato , SUN, Qibin , CHANG, Shih-Fu , SUTO, Masayuki
发明人： MAENO, Kurato , SUN, Qibin , CHANG, Shih-Fu , SUTO, Masayuki
IPC分类号： G06K9/00
CPC分类号： G06T1/005 , G06T1/0042 , G06T2201/0052 , G06T2201/0065
摘要： A system for watermarking an image file selects coefficients using a selection procedure that is kept secret (fig. 4A), and assigns the selected coefficients to coefficient pairs (fig. 4B element 232). The difference between the coefficients of the pairs is biased by a value that varies (fig. 4B element 236), preferably in a pseudo-random manner, and the biased differences are used to generate signature bits that characterize the authentic image at different locations. To detect an unauthorized alteration after the image file has been watermarked, coefficient pairs are selected using the same secret procedure that was originally used to generate the signature bits (fig. 4D element 242). Using a varying bias value permits a tolerance band (figs. 4F-4H) for reducing false alarms to be used without the risk that would otherwise exist that evidence of an attack on the original image might be hidden in the tolerance band.
摘要翻译：用于对图像文件进行水印的系统使用保密的选择过程来选择系数（图4A），并将所选择的系数分配给系数对（图4B元件232）。这些对的系数之间的差异被优选地以伪随机方式改变的值（图4B元件236）偏置，并且偏差差被用于生成表征不同位置处的可靠图像的签名位。为了在图像文件被加水印之后检测未授权的改变，使用最初用于生成签名位的相同的秘密过程来选择系数对（图4D元件242）。使用变化的偏置值允许公差带（图4F-4H）用于减少要使用的假警报，而不会存在否则可能存在对原始图像的攻击的证据可能隐藏在公差带中的风险。

6. 发明申请

WO2003003276A2 METHOD AND SYSTEM FOR WATERMARKING AN ELECTRICALLY DEPICTED IMAGE 审中-公开
标题翻译：用于水印电气识别图像的方法和系统
公开(公告)号：WO2003003276A2
公开(公告)日：2003-01-09
申请号：PCT/US2002/016600
申请日：2002-06-28
申请人： OKI ELECTRIC INDUSTRY CO., LTD. , THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK , MAENO, Kurato , SUN, Qibin , CHANG, Shih-Fu , SUTO, Masayuki
发明人： MAENO, Kurato , SUN, Qibin , CHANG, Shih-Fu , SUTO, Masayuki
IPC分类号： G06K
CPC分类号： G06T1/005 , G06T1/0078 , G06T2201/0052 , G06T2201/0065
摘要： A system for watermarking an image file selects coefficients using a selection procedure that is kept secret, and assigns the selected coefficients to coefficient pairs. The difference between the coefficients of the pairs is then used to generate multi-bit raw signature values that characterize the authentic image at different locations. To detect an unauthorized alteration after the image file has been watermarked, coefficient pairs are selected using the same secret procedure that was originally used to generate the raw signature values. The difference between the coefficients of the pairs is then checked against the raw signature values derived from the original image file. The raw signature values derived from the authentic image file may be placed in the header of the file or in a separate file. Alternatively, they may be embedded in host coefficients that are selected in accordance with a procedure that is kept secret. To reduce the risk of false alarms, more than one raw signature value may be accepted for certain difference ranges of the difference between coefficients of the pairs. Furthermore, the raw signature values may be grouped into sets, which are mapped onto shortened signature codes having a reduced number of bits. The assignment of sets of raw signature values to the shortened signature codes may be based on the probability of the sets of raw signature values.
摘要翻译：用于水印（222）图像文件的系统使用保密的选择过程来选择系数，并将所选择的系数分配给系数对。为了在图像文件被水印之后检测未经授权的更改，使用最初用于生成原始签名（418）值的相同的秘密过程来选择系数对。原始签名值可以被分组成集合，其被映射到具有减少的比特数的缩短的签名（422）码。

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