Data processing apparatus and method
    52.
    发明授权
    Data processing apparatus and method 有权
    数据处理装置及方法

    公开(公告)号:US07284129B2

    公开(公告)日:2007-10-16

    申请号:US10317634

    申请日:2002-12-12

    IPC分类号: H04L9/00 H04N7/167 H04K1/00

    摘要: A watermarking system includes 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 has 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.

    摘要翻译: 一种水印系统包括编码数据处理器,其可操作以通过将预定的一组代码字中的一个引入原始物料的副本来生成原始物料的至少一个标记的版本。 该装置具有可操作以提供具有多个码字系数的码字的码字发生器,以及可操作以将码字系数与该物质组合的编码处理器。 集合的多个码字中的每一个与具有第一和第二字段的数据字唯一地相关联。 第一场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,并且第二场被表示为具有第二多个系数的码字的第二部分。

    Electronic watermark data insertion apparatus and electronic watermark data detection apparatus
    53.
    发明授权
    Electronic watermark data insertion apparatus and electronic watermark data detection apparatus 有权
    电子水印数据插入装置和电子水印数据检测装置

    公开(公告)号:US07159117B2

    公开(公告)日:2007-01-02

    申请号:US09815849

    申请日:2001-03-23

    申请人: Nobuyuki Tanaka

    发明人: Nobuyuki Tanaka

    IPC分类号: H04L9/00

    摘要: An electronic watermark data insertion apparatus comprises an insertion information memory (39) for preliminarily storing insertion information for designating electronic watermark data to be inserted block by block and an electronic watermark data insertion unit (33) for inserting, on the basis of the insertion information, the designated electronic watermark data from an electronic watermark data table (37) in a quantized image block by block. An electronic watermark data detection apparatus comprises an electronic watermark date extracting unit (45) for extracting the image data having a biased frequency region projecting in dependency on the inserted electronic watermark data block by block and an electronic watermark data detection unit (50) for calculating a statistical similarity between the extracted data and the electronic watermark data stored in an electronic watermark data table (48). An electronic watermark data accumulator (51) accumulates the statistical similarity for a predetermined time interval to produce an accumulated addition result which is reset after the elapse of the predetermined time interval or when the accumulated addition result exceeds the a predetermined threshold value. A determining unit (52) determines that the electronic watermark data is detected when the accumulated addition result exceeds the predetermined threshold value.

    摘要翻译: 电子水印数据插入装置包括:插入信息存储器,用于预先存储用于指定逐块插入的电子水印数据的插入信息;以及电子水印数据插入单元,用于根据插入信息插入 ,来自电子水印数据表(37)的指定电子水印数据,以量化图像块为单位。 一种电子水印数据检测装置,包括电子水印日期提取单元(45),用于根据插入的电子水印数据块逐块地提取具有偏置频率区域的图像数据;以及电子水印数据检测单元(50),用于计算 所提取的数据与存储在电子水印数据表(48)中的电子水印数据之间的统计相似度。 电子水印数据累加器(51)在预定的时间间隔内累加统计学相似度,以产生在经过预定时间间隔之后或当累加的相加结果超过预定阈值时复位的累积加法结果。 确定单元(52)确定当累积的相加结果超过预定阈值时检测到电子水印数据。

    Method for embedding and extracting text into/from electronic documents
    56.
    发明授权
    Method for embedding and extracting text into/from electronic documents 有权
    将文本嵌入和提取到电子文档中的方法

    公开(公告)号:US06940995B2

    公开(公告)日:2005-09-06

    申请号:US10169210

    申请日:2001-11-02

    摘要: The present invention relates to a method and apparatus for authenticating various types of digital certificates by using a text embedding method. The execution of the present invention is divided into two case, one case including images in the certificate and another case not including the images in the certificate, according to the characteristics of the certificate. In the former case, a text embedding method is applied to images included in the certificate to embed a series of information text (a specific number of the certificate, and issuing organization, name of a person in charge, etc.) designated by a person who issues the certificate into the images. In the latter case, there is generated an image imperceptible to the human eve but having the same color as the ground color certificate.

    摘要翻译: 本发明涉及一种通过使用文本嵌入方法来认证各种类型的数字证书的方法和装置。 根据证书的特征,将本发明的执行划分为两种情况,一种情况包括证书中的图像和不包括证书中的图像的另一种情况。 在前一种情况下,将文本嵌入方法应用于证书中包含的图像,以嵌入一系列信息文本(特定号码的证书,发行机构,负责人的姓名等),由人指定 谁将证书发布到图像中。 在后一种情况下,产生了人类前夕不可察觉但具有与地面颜色证书相同颜色的图像。

    Collusion-robust watermarking
    57.
    发明申请
    Collusion-robust watermarking 审中-公开
    共谋鲁棒的水印

    公开(公告)号:US20050108535A1

    公开(公告)日:2005-05-19

    申请号:US10504706

    申请日:2003-01-21

    摘要: Watermark embedding is often used to identify multiple copies (Qi) of the same content (Q). Each copy (Qi) is provided with a different private watermark (Wi) which, for example, identifies the player on which that copy may be reproduced. Private watermarks can be hacked. Averaging two or more watermarked copies may cause any of the private watermarks to become undetectable. The watermark embedder (10) in accordance with the invention embeds a global (fixed) watermark (W) in addition to the private watermark (Wi). The global watermark is the same in each copy and therefore remains detectable. Its presence indicates that a private watermark shall be present as well. It can be used in a protocol like: no playback allowed if the global watermark is present and a private watermark is not found.

    摘要翻译: 水印嵌入通常用于识别相同内容的多个拷贝(Qi)(Q)。 每个副本(Qi)被提供有不同的私有水印(Wi),其例如标识可以再现该副本的播放器。 私有水印可能被黑客入侵。 平均两个或更多水印的副本可能导致任何私有水印变得不可检测。 根据本发明的水印嵌入器(10)除了私有水印(Wi)之外还嵌有全局(固定)水印(W)。 全局水印在每个拷贝中是相同的,因此保持可检测。 它的存在表明私有水印也应该存在。 它可以在如下协议中使用:如果存在全局水印并且没有找到私有水印,则不允许播放。

    Digital watermarking of binary document using halftoning
    58.
    发明授权
    Digital watermarking of binary document using halftoning 失效
    使用半色调的二进制文档的数字水印

    公开(公告)号:US06775394B2

    公开(公告)日:2004-08-10

    申请号:US10095493

    申请日:2002-03-12

    申请人: Hong Heather Yu

    发明人: Hong Heather Yu

    IPC分类号: G06K900

    摘要: The present invention is a method for hiding data in document contents. The method comprises receiving information relating to the document contents, 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, and embedding the halftone pixel groups into a binary portion of the document contents. Further, the present invention is a method for extracting data hidden in document contents. The method comprises receiving information relating to the document contents, wherein the document contents include halftone pixel groups, extracting the halftone pixel groups from the document contents, and converting the halftone pixel groups to the data according to predefined binary classifications associated with combinations of halftone pixels.

    摘要翻译: 本发明是一种在文件内容中隐藏数据的方法。 该方法包括接收与文档内容有关的信息,其中文档内容的至少一部分具有二进制特征,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,并且嵌入半色调像素组 成为文档内容的二进制部分。 此外,本发明是提取隐藏在文档内容中的数据的方法。 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,从文档内容中提取半色调像素组,并根据与半色调像素的组合相关联的预定二进制分类将半色调像素组转换为数据 。