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    SYSTEMS AND METHODS FOR AUTHENTICATING OBJECTS USING MULTIPLE-LEVEL IMAGE ENCODING AND DECODING
    101.
    发明申请
    SYSTEMS AND METHODS FOR AUTHENTICATING OBJECTS USING MULTIPLE-LEVEL IMAGE ENCODING AND DECODING 审中-公开
    使用多级图像编码和解码来验证对象的系统和方法

    公开(公告)号：WO2006020553A2

    公开(公告)日：2006-02-23

    申请号：PCT/US2005/028092

    申请日：2005-08-05

    Applicant: GRAPHIC SECURITY SYSTEMS CORPORATION ,  ALASIA, Alfred, V. ,  ALASIA, Alfred, J. ,  ALASIA, Thomas, C. ,  CVETKOVIC, Slobodan

    Inventor： ALASIA, Alfred, V. ,  ALASIA, Alfred, J. ,  ALASIA, Thomas, C. ,  CVETKOVIC, Slobodan

    IPC: G06K9/36

    CPC classification number: H04N1/32203 ,  G06T1/0071 ,  H04N1/32256 ,  H04N1/32267 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/328

    Abstract: A method of producing a digital multiple-level encoded image is presented. The method comprises obtaining a digital authentication image, obtaining a first encoding parameter set comprising one or more encoding parameters, and constructing a first encoded image. The first encoded image is constructed using a first encoding methodology, the digital authentication image and the first encoding parameter set. The method further comprises obtaining a second encoding parameter set comprising one or more encoding parameters and constructing a second encoded image using a second encoding methodology, the first encoded image and the second encoding parameter set. The second encoded image may be decoded to reveal the first encoded image using a decoder having characteristics corresponding to at least a portion of the encoding parameters of the second encoding parameter set. The first encoded image may be decoded to reveal the authentication image using a decoder having characteristics corresponding to at least a portion of the encoding parameters of the first encoding parameter set.

    Abstract translation: 提出了一种产生数字多级编码图像的方法。 该方法包括获得数字认证图像，获得包括一个或多个编码参数的第一编码参数集，以及构建第一编码图像。 使用第一编码方法，数字认证图像和第一编码参数组来构建第一编码图像。 该方法还包括获得包含一个或多个编码参数的第二编码参数集，并使用第二编码方法，第一编码图像和第二编码参数集来构建第二编码图像。 第二编码图像可以被解码以使用具有对应于第二编码参数集的编码参数的至少一部分的特征的解码器来显示第一编码图像。 第一编码图像可以被解码以使用具有对应于第一编码参数集的编码参数的至少一部分的特征的解码器来显示认证图像。

    DIGITAL WATERMARKING OF BINARY DOCUMENT USING HALFTONING
    103.
    发明申请
    DIGITAL WATERMARKING OF BINARY DOCUMENT USING HALFTONING 审中-公开
    使用半自动化的二进制文件数字水印

    公开(公告)号：WO2003079277A1

    公开(公告)日：2003-09-25

    申请号：PCT/US2003/006782

    申请日：2003-03-07

    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. ,  YU, Hong, Heather

    Inventor： YU, Hong, Heather

    IPC: G06K9/00

    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).

    Abstract translation: 本发明是一种在文件内容中隐藏数据的方法（图1）。 该方法包括接收与文档内容相关的信息，（102），其中文档内容的至少一部分具有二进制性质，根据与半色调像素的组合相关联的预定二进制分类将数据转换为半色调像素组（104 ），并且将半色调像素组嵌入到文档内容（104和114）的二进制部分中。 此外，本发明是一种用于提取隐藏在文档内容中的数据的方法（图7）。该方法包括接收与文档内容相关的信息，其中文档内容包括半色调像素组，从该文件内容中提取半色调像素组 文件内容（712），并且根据与半色调像素的组合相关联的预定义的二进制分类，将半色调像素组转换为数据。

    電子透かしの埋め込み方法および抽出方法、並びにそれら装置
    105.
    发明申请
    電子透かしの埋め込み方法および抽出方法、並びにそれら装置 审中-公开
    电子水印嵌入方法及其提取方法及设备

    公开(公告)号：WO2003009580A1

    公开(公告)日：2003-01-30

    申请号：PCT/JP2002/006477

    申请日：2002-06-27

    Applicant: 興和株式会社

    Inventor： 松井 甲子雄

    IPC: H04N1/387

    CPC classification number: G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0083 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32261 ,  H04N1/32309

    Abstract: A block dividing unit (41) divides a binary image into a plurality of blocks (S104). A unit for counting the number of pixels (42) calculates a number of black pixels B i for each block A i (S106). A calculation unit (44) calculates a remainder b i of the number of black pixels B i with respect to a reference value p (S112). A unit for counting the number of modification pixels (45) decides whether the watermark information d i to be embedded in the object block Ai is “1” or “0” (S114). When the watermark information d i is decided to be “1”, the number of modification pixels c i is calculated so that the remainder b i is (3/4)p (S116). When the watermark information d i is decided to be “0”, the number of modification pixels c i is calculated so that the remainder b i is (1/4)p (S118). A pixel modification unit (46) modifies the pixel value of pixels in the object block A i (S124). Thus, it is possible to embed watermark information appropriate for an image based on a line drawing such as a cartoon.

    Abstract translation: 块分割单元（41）将二进制图像划分为多个块（S104）。 用于对像素数进行计数的单元（42）针对每个块A （S106）计算黑色像素数目B s i i / sb（S106）。 计算单元（44）相对于参考值p计算黑色像素数目B s i i / sb的余数b i （S112）。 用于对修改像素数进行计数的单元（45）判定要嵌入在对象块Ai中的水印信息d i = i 1是否为“1”或“0”（S114）。 当水印信息d / i> / sb>被确定为“1”时，计算修正像素数目i i，以使剩余部分b i 是（3/4）p（S116）。 当水印信息d i 被确定为“0”时，计算修改像素数目i i / sb，使得剩余部分b i 是（1/4）p（S118）。 像素修改单元（46）修改对象块A（s4）中的像素的像素值（S124）。 因此，可以基于诸如卡通的线条绘制适合于图像的水印信息。

    DIGITAL AUTHENTICATION WITH DIGITAL AND ANALOG DOCUMENTS
    106.
    发明申请
    DIGITAL AUTHENTICATION WITH DIGITAL AND ANALOG DOCUMENTS 审中-公开
    数字和模拟文件的数字验证

    公开(公告)号：WO2002099735A1

    公开(公告)日：2002-12-12

    申请号：PCT/US2002/017700

    申请日：2002-06-05

    Applicant: MEDIASEC TECHNOLOGIES, LLC

    Inventor： ZHAO, Jian

    IPC: G06K9/00

    CPC classification number: H04N21/8358 ,  G06F21/10 ,  G06F2221/0737 ,  G06T1/0021 ,  G06T1/005 ,  G06T2201/0065 ,  G07D7/004 ,  H04N1/32101 ,  H04N1/32122 ,  H04N1/32133 ,  H04N1/32144 ,  H04N1/32203 ,  H04N1/32213 ,  H04N1/32283 ,  H04N7/1675 ,  H04N2201/3225 ,  H04N2201/3226 ,  H04N2201/3233 ,  H04N2201/3235 ,  H04N2201/3236 ,  H04N2201/3269 ,  H04N2201/327 ,  H04N2201/3271 ,  H04N2201/3281

    Abstract: Techniques for incorporating authentication information into digital representations of objects and using the authentication information to authenticate the objects. The authentication information may be made from information in one portion of the digital representation and incorporated into another portion of the digital representation that does not overlap the first portion. Where the digital representation is made into an analog form (703) and that in turn is made into a digital representation (706) and the second digital representation is verified, the two portions must further be non-overlapping in the analog form. The information from which the authentication is made may exist at many levels: representations of physical effects produced by the object, representations of features of the object, codes that represent the object's contents, and representations of descriptions of the object. Also disclosed are a verification server and techniques for reducing errors by an OCR. The verification server (717) verifies authenticated documents. When a document is verified, an identifier is associated with the document and the identifier is used to locate a key for authentication information and in some cases a second copy of the authentication information. The verification process may also involve security patterns that are a physical part of the analog form. The error reduction techniques include an error code specifying characters in the object that are confusing to OCR devices, and the error code is used to correct the results of an OCR reading of an analog form.

    Abstract translation: 将认证信息合并到对象的数字表示中并使用认证信息来认证对象的技术。 认证信息可以由数字表示的一部分中的信息进行，并且被合并到与第一部分不重叠的数字表示的另一部分中。 在将数字表示形成为模拟形式（703）并且进而变成数字表示（706）并且第二数字表示被验证的情况下，这两个部分必须以模拟形式进一步不重叠。 进行认证的信息可以存在于许多层面：由对象产生的物理效应的表示，对象的特征的表示，表示对象的内容的代码以及对象的描述的表示。 还公开了一种用于通过OCR减少错误的验证服务器和技术。 验证服务器（717）验证经认证的文档。 当文档被验证时，标识符与文档相关联，并且使用标识符来定位用于认证信息的密钥，并且在某些情况下用于鉴定认证信息的第二副本。 验证过程还可以涉及作为模拟形式的物理部分的安全模式。 错误减少技术包括指定对象中与OCR设备混淆的字符的错误代码，并且错误代码用于校正模拟形式的OCR读取的结果。

    DETECTING HALFTONE MODULATIONS EMBEDDED IN AN IMAGE
    108.
    发明申请
    DETECTING HALFTONE MODULATIONS EMBEDDED IN AN IMAGE 审中-公开
    检测嵌入在图像中的HONEFT调制

    公开(公告)号：WO2002089464A1

    公开(公告)日：2002-11-07

    申请号：PCT/US2002/013254

    申请日：2002-04-26

    Applicant: HEWLETT-PACKARD COMPANY

    Inventor： YEN, Jonathan ,  TRETTER, Daniel, R. ,  KIMMEL, Ron

    IPC: H04N1/32

    CPC classification number: G06T1/0021 ,  H04N1/32203 ,  H04N1/32256

    Abstract: Systems and method of detecting halftone modulations that are embedded in an image (18) are described. The halftone modulations represent an ordered sequence of digital halftone microscreens (46) that encodes information (14) that has been embedded in the image (18). In one embodiment, the embedded information (14) is detected by applying a respective matched filter (82) to the image (18) for each of two or more different halftone modulations to identify the ordered sequence of halftone modulations embedded in the image (18). This approach provides an effective, robust and efficient scheme for detecting such halftone modulations without knowledge of the original image (16) before halftone modulation.

    Abstract translation: 描述了嵌入在图像（18）中的半色调调制的检测系统和方法。 半色调调制表示编码已经嵌入图像（18）中的信息（14）的数字半色调显微镜（46）的有序序列。 在一个实施例中，通过针对两个或更多个不同的半色调调制中的每一个调用相应的匹配滤波器（82）来检测嵌入信息（14），以识别嵌入在图像中的半色调调制的有序序列（18） ）。 这种方法提供了一种有效，鲁棒和有效的方案，用于在半色调调制之前无需了解原始图像（16）来检测这种半色调调制。

    METHOD OF EMBEDDING/DETECTING DIGITAL WATERMARK AND APPARATUS FOR USING THEREOF
    109.
    发明申请
    METHOD OF EMBEDDING/DETECTING DIGITAL WATERMARK AND APPARATUS FOR USING THEREOF 审中-公开
    嵌入/检测数字水印的方法及其使用方法

    公开(公告)号：WO2002087250A1

    公开(公告)日：2002-10-31

    申请号：PCT/KR2002/000679

    申请日：2002-04-13

    Applicant: MARKANY INC. ,  LEE, Jung-Soo ,  CHOI, Jong-Uk

    Inventor： LEE, Jung-Soo ,  CHOI, Jong-Uk

    IPC: H04N7/24

    CPC classification number: H04N19/467 ,  G06T1/005 ,  G06T2201/0065 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32293 ,  H04N1/32309 ,  H04N1/32352 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/328

    Abstract: A watermark is embedded in spatial domain. However, the same effect as the watermark is embedded in frequency domain is obtained by inverse frequency transforming the watermark, and then embedding it. By doing that, robustness of the watermark is enhanced in comparison with conventional method for generating a watermark and adding it in spatial domain. Also, the watermark can be detected, even though an image is passed through stirmark, by enlarging the size of the watermark generated by inverse frequency transforming through re-sampling. In detecting the watermark, by high frequency filtering the watermarked image and getting all blocks of the watermarked image together, the effect of removing image component is obtained. Thereby, the detection speed of the watermark is improved, and the detection rate is increased as well.

    Abstract translation: 水印嵌入在空间域中。 然而，通过对水印进行逆频率变换，然后嵌入，获得与频域嵌入水印相同的效果。 通过这样做，与用于生成水印并将其添加到空间域的常规方法相比，增强了水印的鲁棒性。 此外，即使图像通过stirmark，也可以通过放大通过重新采样的逆频率变换产生的水印的大小来检测水印。 在检测水印时，通过对水印图像进行高频滤波，并将所有的水印图像块整合在一起，可以获得去除图像分量的效果。 由此，提高了水印的检测速度，并且也提高了检测率。

    SIGNAL PROCESSING METHODS, DEVICES, AND APPLICATIONS FOR DIGITAL RIGHTS MANAGEMENT
    110.
    发明申请
    SIGNAL PROCESSING METHODS, DEVICES, AND APPLICATIONS FOR DIGITAL RIGHTS MANAGEMENT 审中-公开
    信号处理方法，设备和数字权限管理应用

    公开(公告)号：WO0054453A9

    公开(公告)日：2002-07-04

    申请号：PCT/US0006296

    申请日：2000-03-10

    Applicant: DIGIMARC CORP ,  LEVY KENNETH L ,  ACOUSTIC INFORMATION PROC LAB

    Inventor： LEVY KENNETH L

    IPC: G06T1/00 ,  G09C5/00 ,  G10K15/02 ,  G10L11/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04L9/00

    CPC classification number: G06T1/0021 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32272 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/3281

    Abstract: Techniques are detailed for steganographically embedding auxiliary data (1030) within electronic content (e.g., audio, video, still imagery, etc.) (1020) in manners that are computationally simple, yet highly inconspicuous (1010). The embedded data can convey copyright or other ownership information, or may be used for device control purposes (e.g., preventing unauthorized reproduction). A number of countermeasures against removal of the auxiliary data are contemplated, including keying use of the content to the presence of such data. The embedded data may be made dependent on the media encoded, e.g., by modifying the embedded data in accordance with characteristics from the media. Encryption can also advantageously be employed (1040). Playback devices may be equipped to track IDs from previously-accessed content, and enforce usage rules. Some embodiments employ multiple watermarks to advantage, e.g., a robust watermark is encoded prior to distribution and indicates the content is protected, and a second watermark is encoded by the playback device and serves to uniquely link that content to that device. Some applications benefit from scrambling of content, in a manner that leaves certain information (e.g., from a header) unscrambled and freely accessible.

    Abstract translation: 技术详细描述了在电子内容（例如，音频，视频，静止图像等）（1020）中隐藏地嵌入辅助数据（1030），其方式是计算上简单但高度不显眼的（1010）。 嵌入的数据可以传达版权或其他所有权信息，或者可以用于设备控制目的（例如，防止未经授权的再现）。 考虑了一些对除去辅助数据的对策，包括使用该内容来存在这样的数据。 嵌入数据可以取决于编码的媒体，例如通过根据来自媒体的特征修改嵌入数据。 也可以有利地采用加密（1040）。 播放设备可以配备来跟踪先前访问的内容的ID，并且强制使用规则。 一些实施例有利地使用多个水印，例如，鲁棒水印在分发之前被编码，并且指示内容被保护，并且第二水印由回放设备编码，并用于将该内容唯一地链接到该设备。 一些应用程序受益于内容的加扰，以某种方式使某些信息（例如，从标题）解扰并可自由访问。

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