Digital watermark embedding method, digital watermark extraction method, digital watermark embedding apparatus, and digital watermark extraction apparatus
    1.
    发明授权
    Digital watermark embedding method, digital watermark extraction method, digital watermark embedding apparatus, and digital watermark extraction apparatus 失效
    数字水印嵌入方法,数字水印提取方法,数字水印嵌入装置和数字水印提取装置

    公开(公告)号:US07269274B2

    公开(公告)日:2007-09-11

    申请号:US10727637

    申请日:2003-12-05

    IPC分类号: G06K9/00 G06K9/34 G06K15/00

    CPC分类号: G06T1/0021

    摘要: An apparatus for embedding a digital watermark in a document image detects circumscribing outer shapes of characters in the document image and sets a plurality of reference lines that extend in the column direction and are spaced apart in the row direction by a basic pitch. The outer shapes include a first outer shape, a second outer shape that neighbors the first outer shape, and a third outer shape that neighbors the second outer shape, and the reference lines include a first reference line located between the first outer shape and the second outer shape, and a second reference line located between the second outer shape and the third outer shape. Control is performed for at least one of the second and third outer shapes so that a distance between the first reference line and an edge of the second outer shape is different from a distance between the second reference line and an edge of the third outer shape, in accordance with digital watermark information to be embedded.

    摘要翻译: 用于在文件图像中嵌入数字水印的装置检测文档图像中的外部字符的外形,并且设置在列方向上延伸并以行方向间隔开的基准间距的多个参考线。 外形包括第一外形,邻近第一外形的第二外形和与第二外形相邻的第三外形,并且参考线包括位于第一外形和第二外形之间的第一参考线 以及位于第二外形和第三外形之间的第二参考线。 对第二外形和第三外形中的至少一个执行控制,使得第一参考线与第二外形的边缘之间的距离不同于第二参考线与第三外形的边缘之间的距离, 根据要嵌入的数字水印信息。

    Digital watermark embedding method, apparatus, digital watermark extraction method and apparatus
    3.
    发明授权
    Digital watermark embedding method, apparatus, digital watermark extraction method and apparatus 失效
    数字水印嵌入方法,装置,数字水印提取方法及装置

    公开(公告)号:US07260238B2

    公开(公告)日:2007-08-21

    申请号:US10727636

    申请日:2003-12-05

    摘要: Distance d1 between the right edges of A1 and B2, and distance d2 between the right edges of A3 and B4 are calculated. If data to be embedded is 1, one or a combination of a process for increasing the size of B2 in the column direction or decreasing the size of B4 in the column and a process for moving the position of B2 toward B3 or moving the position of B4 toward B3 is executed to meet d1>d2. If data to be embedded is 0, one or a combination of a process for decreasing the size of B2 in the column direction or increasing the size of B4 in the column direction, and a process for moving the position of B2 toward B1 or moving the position of B4 toward B5 is executed to meet d1

    摘要翻译: 计算A 1和B 2的右边缘之间的距离d 1,以及A 3和B 4的右边缘之间的距离d 2。 如果要嵌入的数据为1,则在列方向上增加B 2的大小或减小列中的B 4的大小的处理的一个或组合以及将B 2的位置移动到B 3的处理或 将B 4的位置向B 3移动,以满足d 1> d 2。 如果要嵌入的数据为0,则在列方向上减小B 2的大小或者增加列方向上的B 4的大小的处理的一个或组合,以及将B 2的位置移动到B的处理 1或将B 4的位置移向B 5,以满足d 1

    Digital watermark extracting method, apparatus, program and storage medium
    4.
    发明授权
    Digital watermark extracting method, apparatus, program and storage medium 失效
    数字水印提取方法,装置,程序和存储介质

    公开(公告)号:US07190807B2

    公开(公告)日:2007-03-13

    申请号:US10385852

    申请日:2003-03-12

    IPC分类号: G06K9/00

    摘要: The invention is to precisely extract a digital watermark from image data which are subjected to embedding of the digital watermark in a state of a binary image and are then converted into a multi-value image (gray scale image).For attaining the foregoing object, a digital watermark extracting apparatus for extracting a digital watermark for example in an original includes an acquiring unit for acquiring multi-value image data obtained by reading the original with a predetermined reading unit, a pre-processing unit for selecting one of plural threshold values and binarizing the multi-value image data with the selected threshold value, and an extracting unit for extracting the digital watermark from image data binarized in the pre-processing unit, wherein selection of the threshold value, binarization an extraction of the digital watermark are repeated to obtain an optimum extraction result of the digital watermark.

    摘要翻译: 本发明是从二进制图像的状态中嵌入数字水印的图像数据精确地提取数字水印,然后转换为多值图像(灰度图像)。 为了实现上述目的,例如在原件中提取数字水印的数字水印提取装置包括:获取单元,用于获取通过以预定读取单元读取原稿而获得的多值图像数据;预处理单元,用于选择 多个阈值中的一个,并且利用所选择的阈值对多值图像数据进行二值化;以及提取单元,用于从预处理单元中二值化的图像数据中提取数字水印,其中选择阈值,二值化和提取 重复数字水印以获得数字水印的最佳提取结果。

    Digital watermark embedding apparatus, digital watermark extraction apparatus, and methods thereof
    6.
    发明授权
    Digital watermark embedding apparatus, digital watermark extraction apparatus, and methods thereof 失效
    数字水印嵌入装置,数字水印提取装置及其方法

    公开(公告)号:US07209572B2

    公开(公告)日:2007-04-24

    申请号:US10456534

    申请日:2003-06-09

    IPC分类号: H04K1/00

    摘要: A document image undergoes document analysis to obtain circumscribing rectangles of characters (S601), and two distances between non-neighboring circumscribing rectangles from the head of the document are respectively calculated as d1 and d2 (S603). If information to be embedded is 1, one or a combination of a process for changing a parameter associated with the size of a circumscribing rectangle and a process for changing a parameter associated with the position of a circumscribing rectangle is executed to satisfy d1>d2 (S605). If information to be embedded is 0, one or a combination of the above two parameter change processes is executed to satisfy d1

    摘要翻译: 文档图像经历文档分析以获得字符的外接矩形(S 601),并且从文档头部的不相邻外接矩形之间的两个距离分别被计算为d 1和d 2(S 603)。 如果要嵌入的信息为1,则执行用于改变与外接矩形的尺寸相关联的参数的处理的一个或组合,以及用于改变与外接矩形的位置相关联的参数的处理以满足d 1> d 2(S 605)。 如果要嵌入的信息为0,则执行上述两个参数改变处理中的一个或组合以满足d 1

    Image processor, method thereof, computer program, and computer readable storage medium
    8.
    发明授权
    Image processor, method thereof, computer program, and computer readable storage medium 失效
    图像处理器,其方法,计算机程序和计算机可读存储介质

    公开(公告)号:US07571323B2

    公开(公告)日:2009-08-04

    申请号:US10759364

    申请日:2004-01-16

    IPC分类号: H04L9/00 G06K9/00

    摘要: A method for image processing comprising inputting and reading a combined image that includes a latent image unperceivable by the human eye, a patterned image in the background allowing the latent image to appear clearly on a recording medium when data recorded on a recording medium is copied onto another recording medium, and text and/or image data embedded with a digital watermark. The text and/or image data is extracted from the combined image and the digital watermark extracted from the text and/or image data. A permission code enabling copying of image data composed of a combination of a patterned image and the extracted text and/or image data onto a recording medium is input. The copying is regulated based on the extracted digital watermark and the permission code.

    摘要翻译: 一种用于图像处理的方法,包括输入和读取包括人眼不可察觉的潜像的组合图像,背景中的图案化图像,允许潜像在记录介质上记录的数据被复制到记录介质上清晰地显示在其上 另一种记录介质,以及嵌入数字水印的文本和/或图像数据。 从组合图像和从文本和/或图像数据提取的数字水印中提取文本和/或图像数据。 输入允许将由图案化图像和提取的文本和/或图像数据的组合组成的图像数据复制到记录介质上的许可代码。 基于提取的数字水印和许可代码对复制进行调整。

    Information processing apparatus, method therefor, computer program, and computer-readable storage medium
    9.
    发明授权
    Information processing apparatus, method therefor, computer program, and computer-readable storage medium 有权
    信息处理装置及其方法,计算机程序和计算机可读存储介质

    公开(公告)号:US07552335B2

    公开(公告)日:2009-06-23

    申请号:US10712869

    申请日:2003-11-12

    申请人: Keiichi Iwamura

    发明人: Keiichi Iwamura

    IPC分类号: H04L9/00

    摘要: The present invention provides a technique that allows for a valid modification that is authorized by the author of data, while assuring the originality of the data. An information processing apparatus for processing original data created by a predetermined author is provided. The information processing apparatus includes a modification-information storing unit for storing modification information regarding a modification onto a storage medium when the original data is modified, and a modification-assuring-information creating unit for creating modification assuring information for assuring that the modification information is true.

    摘要翻译: 本发明提供了一种技术,其允许由数据作者授权的有效修改,同时确保数据的原创性。 提供了一种用于处理由预定作者创建的原始数据的信息处理装置。 该信息处理装置包括修改信息存储单元,用于当修改原始数据时将关于修改的修改信息存储到存储介质上;修改信息创建单元,用于创建修改确保信息以确保修改信息为 真正。

    Image data verification system
    10.
    发明授权
    Image data verification system 失效
    图像数据验证系统

    公开(公告)号:US07535488B2

    公开(公告)日:2009-05-19

    申请号:US09987832

    申请日:2001-11-16

    IPC分类号: H04N5/225 H04N7/167 H04L9/00

    摘要: An image verification system has an image generation device and a first image verification device. The image generation device includes (a) an image data generation unit that generates image data, and (b) a first verification data generation unit that generates first verification data from the image data using a common key in common key cryptography. The first image verification device includes (a) a first verification unit that verifies, using the image data, the first verification data and the common key, whether the image data is altered, and (b) a second verification data generation unit that generates second verification data from the image data using a private key in public key cryptography without editing the image data, if the first verification unit verifies that the image data is not altered.

    摘要翻译: 图像验证系统具有图像生成装置和第一图像验证装置。 图像生成装置包括:(a)生成图像数据的图像数据生成单元,以及(b)第一验证数据生成单元,其使用公共密钥加密中的公共密钥从图像数据生成第一验证数据。 第一图像验证装置包括:(a)第一验证单元,其使用图像数据验证第一验证数据和公共密钥,是否改变图像数据;以及(b)生成第二验证数据的第二验证数据生成单元 如果第一验证单元验证图像数据未被改变,则使用公共密钥加密中的专用密钥从图像数据获得的验证数据,而不编辑图像数据。