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    Digital watermark detecting device
    103.
    发明授权
    Digital watermark detecting device 有权
    数字水印检测装置

    公开(公告)号：US08000494B2

    公开(公告)日：2011-08-16

    申请号：US12066772

    申请日：2006-09-27

    Applicant: Koichi Magai ,  Hiroshi Ito ,  Ryousuke Fujii ,  Mitsuyoshi Suzuki ,  Kohtaro Asai ,  Tokumichi Murakami

    Inventor： Koichi Magai ,  Hiroshi Ito ,  Ryousuke Fujii ,  Mitsuyoshi Suzuki ,  Kohtaro Asai ,  Tokumichi Murakami

    IPC: G06K9/00

    CPC classification number: H04N1/32149 ,  G06T1/005 ,  G06T2201/0065 ,  H04N1/00005 ,  H04N1/00037 ,  H04N1/00045 ,  H04N2201/3233 ,  H04N2201/327

    Abstract: A digital watermark detecting device includes an extracting unit to extract pixels embedded as a digital watermark from an input image and to output an extracted pixel value row, a generating unit to generate a set of orthogonal patterns, a detecting unit to calculate a correlation using an integration result of the orthogonal patterns and the extracted pixel value row, to determine detected values corresponding to the orthogonal patterns and a standard deviation for detected values excluding a maximum detected value with a maximum absolute value from the calculated detected values, to calculate a quotient by dividing the maximum detected value by the standard deviation, a discriminating unit to output information corresponding to the result of comparison between a threshold parameter and the quotient, and a unit to convert the detected value inputted from the detecting unit into predetermined information, when the reliability of the detected values satisfies a standard.

    Abstract translation: 一种数字水印检测装置，包括提取单元，从输入图像提取作为数字水印嵌入的像素，并输出提取的像素值行;生成单元，生成一组正交图案;检测单元，使用 正交图案和提取的像素值行的积分结果，以根据所计算的检测值确定与正交图案相对应的检测值和除去具有最大绝对值的最大检测值的检测值的标准偏差，以通过 将最大检测值除以标准偏差，鉴别单元输出与阈值参数和商之间的比较结果相对应的信息，以及将从检测单元输入的检测值转换为预定信息的单元，当可靠性 的检测值满足标准。

    FINE-GRAINED VISUAL DOCUMENT FINGERPRINTING FOR ACCURATE DOCUMENT COMPARISON AND RETRIEVAL
    104.
    发明申请
    FINE-GRAINED VISUAL DOCUMENT FINGERPRINTING FOR ACCURATE DOCUMENT COMPARISON AND RETRIEVAL 有权
    精细的视觉文件指纹精确的文件比较和检索

    公开(公告)号：US20110194736A1

    公开(公告)日：2011-08-11

    申请号：US12701159

    申请日：2010-02-05

    Applicant: Doron Kletter

    Inventor： Doron Kletter

    IPC: G06K9/00

    CPC classification number: H04N1/32229 ,  G06F17/30011 ,  H04N2201/3235 ,  H04N2201/3236 ,  H04N2201/327

    Abstract: A method and system generates fine-grained fingerprints for identifying content in a rendered document. It includes applying image-based techniques to identify patterns in a document rendered by an electronic document rendering system, irrespective of a file format in which the rendered document was electronically created. The applying of the image-based technique includes identifying candidate keypoints at locations in a local image neighborhood of the document, and combining the locations of the candidate keypoints to form a fine-grained fingerprint identifying patterns representing content in the document.

    Abstract translation: 方法和系统生成用于识别呈现文档中的内容的细粒度指纹。 它包括应用基于图像的技术来识别由电子文档呈现系统呈现的文档中的图案，而不管其中呈现的文档被电子地创建的文件格式。 应用基于图像的技术包括在文档的本地图像邻域中的位置处识别候选关键点，并且组合候选关键点的位置以形成表示文档中的内容的细粒度指纹。

    Image processing apparatus, image processing method and memory medium
    109.
    发明授权
    Image processing apparatus, image processing method and memory medium 有权
    图像处理装置，图像处理方法和存储介质

    公开(公告)号：US07986443B2

    公开(公告)日：2011-07-26

    申请号：US12046575

    申请日：2008-03-12

    Applicant: Hirochika Sato

    Inventor： Hirochika Sato

    IPC: H04N1/40

    CPC classification number: G06K15/1801 ,  H04N1/32133 ,  H04N1/32144 ,  H04N1/3263 ,  H04N1/32657 ,  H04N2201/3205 ,  H04N2201/3215 ,  H04N2201/3269 ,  H04N2201/327 ,  H04N2201/3271 ,  H04N2201/3284

    Abstract: An object of the present invention is to solve dissatisfaction of the user who can not take out the source data in a case where a code image in the original can not be decoded. In order to accomplish the above object, the invention provides an image processing apparatus comprising code image detection unit that determines whether or not an code image is included in the original image data, code image decoding unit that decodes the code image to extract source data if it is determined that the code image is included by the code image detection unit, and synthesizing unit that encodes information obtained by decoding a partial area of the code image and overlaying encoded information on the area where the code image is included, if the code image decoding unit is successful in decoding only the partial area of the code image.

    Abstract translation: 本发明的目的是解决在原始码中的码图像不能解码的情况下不能取出源数据的用户的不满意。 为了实现上述目的，本发明提供了一种图像处理装置，包括：代码图像检测单元，其确定代码图像是否包括在原始图像数据中;代码图像解码单元，其对代码图像进行解码以提取源数据，如果 确定代码图像包括在代码图像检测单元中，以及合成单元，其对通过对代码图像的部分区域进行解码而获得的信息并且将编码信息重叠在包括代码图像的区域上的合成单元，如果代码图像 解码单元成功地解码代码图像的部分区域。

    Embedding watermark into halftone image with low distortion using parity values for overlapping groups of candidate sites
    110.
    发明授权
    Embedding watermark into halftone image with low distortion using parity values for overlapping groups of candidate sites 有权
    将水印嵌入具有低失真的半色调图像中，使用候选位置重叠组的奇偶校验值

    公开(公告)号：US07986441B2

    公开(公告)日：2011-07-26

    申请号：US12060949

    申请日：2008-04-02

    Applicant: Oscar Chi Lim Au ,  Richard Yuk Ming Li

    Inventor： Oscar Chi Lim Au ,  Richard Yuk Ming Li

    IPC: H04N1/405 ,  H04N1/409 ,  B41M3/10

    CPC classification number: H04N1/32203 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0061 ,  H04N1/32229 ,  H04N1/32256 ,  H04N2201/3233 ,  H04N2201/327

    Abstract: System and methodologies are provided herein for low-distortion image watermarking. Parity relationships between multiple pixels and/or regions of an image can be leveraged as described herein to reduce the amount of toggling required to embed a watermark in an image, thereby increasing watermark efficiency and reducing visual artifacts introduced in a watermarked image. Various algorithms for leveraging parity relationships are described herein, including a Block-Overlapping Parity Check (BOPC) algorithm, a Champagne Pyramid Parity Check (CPPC) algorithm, and a Tree-Based Parity Check (TBPC) algorithm.

    Abstract translation: 本文提供了用于低失真图像水印的系统和方法。 可以如本文所述利用图像的多个像素和/或区域之间的奇偶校验关系来减少在图像中嵌入水印所需的切换量，从而增加水印效率并减少在水印图像中引入的视觉伪影。 本文描述了用于利用奇偶校验关系的各种算法，包括块重叠奇偶校验（BOPC）算法，香槟金字塔奇偶校验（CPPC）算法和基于树的奇偶校验（TBPC）算法。

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