公开(公告)号：EP1394735A3

公开(公告)日：2004-09-01

申请号：EP03018936.9

申请日：1998-02-13

Applicant: NEC CORPORATION

Inventor： Nakano, Hirotaka ,  Hashimoto, Masahiro ,  Manabe, Koji

IPC: G06T11/00 ,  G06T1/00

CPC classification number: H04N19/00 ,  G06T1/0021 ,  G06T1/0035 ,  G06T1/20 ,  G06T2201/0052 ,  G06T2201/0053 ,  H04N1/32154 ,  H04N1/32165 ,  H04N1/32187 ,  H04N1/32192 ,  H04N1/32277 ,  H04N19/467 ,  H04N19/60 ,  H04N21/23892 ,  H04N21/8358 ,  H04N2201/324

Abstract: An image data encoding system is disclosed, that comprises an electronic watermark embedding means (404) for embedding electronic watermark data selected from a plurality of types (408(0),...,408(n)) of electronic watermark data to the digital image data (401), wherein at least one of the plurality of types (408(0),...,408(n)) of electronic watermark data is predetermined electronic watermark data that does not affect the digital image data (401) even if the electronic watermark data is embedded in the digital image data (401).

公开(公告)号：EP1324264A3

公开(公告)日：2004-05-12

申请号：EP02258558.2

申请日：2002-12-11

Applicant: SONY UNITED KINGDOM LIMITED

Inventor： Pelly, Jason Charles ,  Tapson, Daniel Warren

IPC: G06T1/00

CPC classification number: H04N1/32154 ,  G06T1/005 ,  G06T2201/0052 ,  G06T2201/0063 ,  H04N1/32165 ,  H04N2201/3236 ,  H04N2201/324 ,  H04N2201/327

Abstract: A watermarking system comprises an encoding data processor operable to generate at least one marked version of an original item of material by introducing one of a predetermined set of code words into a copy of the original material item. The encoding data processor is arranged to form other code words of the set by cyclically shifting a first code word. The system includes a detecting data processor operable to identify the code word in the marked material item. The detecting data processor is operable to recover the code word from the marked material item and to form a Fourier transform of the recovered code word and a Fourier transform of the first code word of the set. The data detecting processor forms correlation samples by forming an inverse transform of a combination of the recovered and the first code word. Each of the correlation value samples provides the correlation value for one of the set of code words. A computationally efficient way of calculating the correlation for each code word in the set is thereby provided. As a result a time taken to detect a code word present in a marked material item is improved. The watermarking system finds particular application in identifying a point of distribution of pirate copies of video material generated by capturing the watermarked image, using, for example, a camcorder in a cinema.

Abstract translation: 一种水印系统包括编码数据处理器，可操作用于通过将预定的一组码字中的一个码字引入原始素材项目的副本中来生成原始素材项目的至少一个标记版本。 编码数据处理器被安排成通过循环移位第一码字来形成该组的其他码字。 该系统包括检测数据处理器，该检测数据处理器可操作以识别标记材料项目中的码字。 检测数据处理器可操作用于从标记的材料项目恢复码字并形成恢复的码字的傅里叶变换和该组的第一码字的傅里叶变换。 数据检测处理器通过形成恢复的和第一码字的组合的逆变换形成相关样本。 每个相关值样本为该组码字之一提供相关值。 由此提供了计算集合中的每个码字的相关性的计算有效的方式。 结果，检测存在于标记的材料项中的代码字所花费的时间得到了改善。 使用例如电影院中的可携式摄像机，加水印系统在识别通过捕获带水印的图像而生成的视频材料的盗版副本的分布点中找到特定的应用。

公开(公告)号：EP1209897A3

公开(公告)日：2003-10-15

申请号：EP01309647.4

申请日：2001-11-15

Applicant: Xerox Corporation

Inventor： Lunt, Teresa F. ,  Hecht, David L. ,  Franklin, Matthew K. ,  Berson, Thomas A. ,  Stefik, Mark J. ,  Bell, Alan G. ,  R. Drews, Dean ,  Breuel, Thomas M. ,  Cass, Todd ,  Greene, Daniel H. ,  Curry, Douglas N. ,  Krivacic, Robert T.

IPC: H04N1/32

CPC classification number: H04N1/32523 ,  G06T1/0021 ,  G06T2201/0064 ,  H04N1/32101 ,  H04N1/32144 ,  H04N2201/0082 ,  H04N2201/324 ,  H04N2201/3246 ,  H04N2201/327

Abstract: A print management system includes a policy (113) that determines a protection level for a document to be printed. The document is printed using forgery detection and deterrence technologies, such as fragile and robust watermarks, glyphs, and digital signatures, that are appropriate to the level of protection determined by the policy. A plurality of printers (130) are managed by a print management system (112). Each printer (130) can provide a range of protection technologies. The policy determines the protection technologies for the document to be printed. The print management system (112) routes the print job to a printer (130) that can apply the appropriate protections and sets the appropriate parameters in the printer. Copy evidence that can establish that a document is a forgery and/or tracing information that identifies the custodian of the document and restrictions on copying of the document and use of the information in the document are included in the watermark that is printed on the document. A document can be verified as an original or established as a forgery by inspecting the copy evidence and/or tracing information in the watermark.

公开(公告)号：EP1324263A2

公开(公告)日：2003-07-02

申请号：EP02258557.4

申请日：2002-12-11

Applicant: Sony United Kingdom Limited

Inventor： Pelly, Jason Charles ,  Tapson, Daniel Warren

IPC: G06T1/00

CPC classification number: H04N1/32154 ,  G06T1/0071 ,  G06T2201/0052 ,  G06T2201/0063 ,  H04N1/32165 ,  H04N2201/324 ,  H04N2201/327

Abstract: A watermarking system comprises an encoding data processor operable to generate at least one marked version of an original item of material by introducing one of a predetermined set of code words into a copy of the original material item. The apparatus comprises a code word generator operable to provide the code word having a plurality of code word coefficients, and an encoding processor operable to combine the code word coefficients with the material. Each of the plurality of code words of the set is uniquely associated with a data word having first and second fields. Each of a set of values of the first field is represented as a first part of the code word having a first plurality of coefficients, and the second field is represented as a second part of the code word having a second plurality of coefficients.
The present invention provides a facility for generating watermark code words having a hierarchy of values. By providing watermark code words having first and second parts, a data word with first and second fields can be uniquely identified. The first and second fields can be assigned to different associated parameters such as for example address parameters. The first field could therefore identify the country of distribution of the material, whereas the second field could identify a particular distribution outlet within the country. A watermarking system can be formed, which finds particular application in identifying a point of distribution of pirate copies of video material generated by capturing the watermarked image, using, for example, a camcorder in a cinema.

Abstract translation: 一种水印系统包括编码数据处理器，可操作用于通过将预定的一组码字中的一个码字引入原始素材项目的副本中来生成原始素材项目的至少一个标记版本。 该设备包括可操作用于提供具有多个码字系数的码字的码字生成器以及可操作用于将码字系数与该材料组合的编码处理器。 该组的多个码字中的每一个码字与具有第一和第二场的数据字唯一关联。 第一字段的一组值中的每一个被表示为具有第一多个系数的码字的第一部分，并且第二字段被表示为具有第二多个系数的码字的第二部分。 本发明提供了一种用于产生具有值分层的水印码字的设施。 通过提供具有第一和第二部分的水印码字，可以唯一地识别具有第一和第二字段的数据字。 第一和第二字段可以被分配给不同的相关参数，例如地址参数。 因此，第一个领域可以确定材料的分布国家，而第二个领域可以确定该国内的特定分销网点。 可以形成水印系统，该水印系统使用例如电影院中的可携式摄像机来找到特定的应用，以识别通过捕获带水印的图像而生成的视频材料的盗版副本的分发点。

公开(公告)号：EP1089550A3

公开(公告)日：2003-04-16

申请号：EP00307965.4

申请日：2000-09-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Hirofumi, Muratani

IPC: H04N1/32

CPC classification number: G06T1/005 ,  G06T2201/0063 ,  G10L19/018 ,  H04H20/31 ,  H04H2201/50 ,  H04N1/32144 ,  H04N2201/3226 ,  H04N2201/3236 ,  H04N2201/324 ,  H04N2201/327

Abstract: Residue calculating sections (22-1, ···, 22-k') respectively obtain residues which take a plurality of integers as modulus, with respect to a user ID. The plurality of integers are stored in modulus storage sections (21-1, ···, 21-k') and are prime to each other. Based on these residues and parameters stored in a coding parameter storage section (23), component codes constructed by continuous sequences of 1 and 0 using a predetermined number of bits as a unit are respectively generated by component code generating sections (24-1, ···, 24-k'). These component codes are concatenated by a concatenating section (25), thereby to obtain a code to be embedded, which constructs watermark information.

公开(公告)号：EP1055321A1

公开(公告)日：2000-11-29

申请号：EP99905133.7

申请日：1999-02-09

Applicant: Fraunhofer-Gesellschaft zurFörderung der angewandten Forschung e.V.

Inventor： ZHAO, Jian ,  KOCH, Eckhard ,  SAITO, Makato

IPC: H04N1/32

CPC classification number: H04N1/32144 ,  G06T1/0021 ,  H04L63/0428 ,  H04L2463/101 ,  H04L2463/103 ,  H04N1/32272 ,  H04N2201/3205 ,  H04N2201/323 ,  H04N2201/3233 ,  H04N2201/3235 ,  H04N2201/324 ,  H04N2201/327 ,  H04N2201/3274 ,  H04N2201/3278 ,  H04N2201/3281

Abstract: Techniques for secure distribution of digital representations that combine encryption and watermarking. When a user at a client desires to download a digital representation, the user makes a request to a server for the digital representation, which encrypts the digital representation using a first key and downloads the encrypted digital representation to the user. Before the user performs any operation on the decrypted digital representation, a secret fingerprint watermark identifying the user is added to the digital representation. The fingerprint watermark is added either at the server or at the client and a copy of the fingerprinted digital representation is kept at the server. If the user makes an impermissible use of the digital representation, the secret fingerprint watermark can be used to identify the user. The request made by the user indicates the type of use that the user whished to make of the digital representation. If the use involves storage of the digital representation at the client, the server provides a second key that the client employs to encrypt the digital representation. If the user has permission to do so, the user may modify the digital representation and return the modified digital representation to the server for further distribution. In this case, the second key is used to encrypt the digital representation when it is sent to the server. The second key also serves as the user identification in the fingerprint watermark. If the user loses the second key, it can be recovered from the copy of the fingerprinted digital representation kept at the server. The first and second keys and any decrypted copy of the digital representation are kept in secure storage in the client.

公开(公告)号：EP0660275B1

公开(公告)日：1999-10-20

申请号：EP94308916.9

申请日：1994-12-01

Applicant: AT&T Corp.

Inventor： Brassil, John Thomas ,  Low, Steven Hwye ,  Maxemchuk, Nicholas Frank ,  O'Gorman, Lawrence Patrick

IPC: G07D7/00 ,  G03G21/04 ,  G07F7/08

CPC classification number: G07F7/08 ,  G03G21/04 ,  G07D7/004 ,  G07D7/0047 ,  G07D7/20 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32219 ,  H04N1/32261 ,  H04N2201/3233 ,  H04N2201/324 ,  H04N2201/327 ,  Y10S283/901

公开(公告)号：EP1488369A4

公开(公告)日：2006-05-24

申请号：EP03713924

申请日：2003-03-07

Applicant: MATSUSHITA ELECTRIC IND CO LTD

Inventor： YU HONG HEATHER

IPC: G06K9/00 ,  G06K9/36 ,  G06T1/00 ,  H04N1/00 ,  H04N1/32 ,  H04N1/387

CPC classification number: H04N1/00 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0083 ,  H04N1/32203 ,  H04N1/32256 ,  H04N2201/3225 ,  H04N2201/3236 ,  H04N2201/3239 ,  H04N2201/324

Abstract: The present invention is a method (Fig. 1) for hiding data in document contents. The method comprises receiving information relating to the document contents, (102) , wherein at least part of the document contents are of a binary nature, converting the data to halftone pixel groups according to predefined binary classifications associated with combinations of halftone pixels, (104), and embedding the halftone pixel groups into a binary portion of the document contents (104 and 114). Further, the present invention is a method for extracting data hidden in document contents (Fig. 7) The method comprises receiving information relating to the document contents (702), wherein the document contents include halftone pixel groups, extracting the halftone pixel groups from the document contents (712), and converting the halftone pixel groups to the data according to predefined binary classifications associated with combinations of halftone pixels (714).

公开(公告)号：EP1624359A3

公开(公告)日：2006-03-01

申请号：EP05022949.1

申请日：2000-09-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Muratani, Hirofumi, K.K. Toshiba

IPC: H04N1/32

CPC classification number: G06T1/005 ,  G06T2201/0063 ,  G10L19/018 ,  H04H20/31 ,  H04H2201/50 ,  H04N1/32144 ,  H04N2201/3226 ,  H04N2201/3236 ,  H04N2201/324 ,  H04N2201/327

Abstract: A unit for embedding watermark information containing information of a user identification number into a predetermined content, comprising:

means for outputting one codeword selected from a plurality of codewords constructing a simplex code, in correspondence with an inputted user identification number, and
means for embedding the outputted codeword as the watermark information into the content as an embedding target,
   
wherein the Hamming distance between codewords of component codes is proportional to the distance between watermarks corresponding to the codewords.

公开(公告)号：EP1624359A2

公开(公告)日：2006-02-08

申请号：EP05022949.1

申请日：2000-09-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Muratani, Hirofumi, K.K. Toshiba

IPC: G06F1/00

CPC classification number: G06T1/005 ,  G06T2201/0063 ,  G10L19/018 ,  H04H20/31 ,  H04H2201/50 ,  H04N1/32144 ,  H04N2201/3226 ,  H04N2201/3236 ,  H04N2201/324 ,  H04N2201/327

Abstract: A unit for embedding watermark information containing information of a user identification number into a predetermined content, comprising:

means for outputting one codeword selected from a plurality of codewords constructing a simplex code, in correspondence with an inputted user identification number, and
means for embedding the outputted codeword as the watermark information into the content as an embedding target,
   
wherein the Hamming distance between codewords of component codes is proportional to the distance between watermarks corresponding to the codewords.

Abstract translation: 一种用于嵌入水印信息包含用户的识别号码的信息转换成一个预定的内容，包括单元：用于在输入的使用者标识号，从代码字构成单一代码的多个所选择的，对应于输出廷一个码字的装置，以及用于嵌入 所输出的代码字作为水印信息到内容中，以嵌入目标，€ƒ€ƒ€ƒworin的分量码码字之间的汉明距离是成比例的水印相对应的码字之间的距离。