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11. 发明授权

US06788821B2 Digital information embedding/extracting apparatus and method, and medium including a program for executing the method recorded thereon 有权
标题翻译：数字信息嵌入/提取装置和方法，以及包括用于执行记录在其上的方法的程序的介质
公开(公告)号：US06788821B2
公开(公告)日：2004-09-07
申请号：US09879136
申请日：2001-06-13
申请人： Hisashi Inoue , Takashi Katsura
发明人： Hisashi Inoue , Takashi Katsura
IPC分类号： G06K946
CPC分类号： G06T1/0028 , G06T2201/0052 , G06T2201/0061 , H04N1/32154 , H04N1/3216 , H04N1/32165 , H04N1/3217 , H04N1/32176 , H04N1/32277
摘要： In an embedding apparatus, a transform section divides an original image into a plurality of blocks to perform orthogonal transform every block. An embedding section embeds a pseudo-random number sequence mapped with inherent digital information in part of a transform coefficients sequence obtained by the orthogonal transform using a weight sequence. In an extracting apparatus, a calculation section reads transform coefficients sequences for respective blocks from the data including the pseudo-random number sequence embedded therein in a predetermined order, and calculates an inner product between the transform coefficients sequences and a pseudo-random number sequence. A determination section determines that the pseudo-random number sequence has been embedded when the inner product is greater than a predetermined threshold value. A generation section extracts inherent digital information mapped with the determined pseudo-random number sequence. This method discourages deciphering of the digital information, suppresses image quality deterioration, and improves the detection rate of watermark data.
摘要翻译：在嵌入装置中，变换部将原始图像分割为多个块，对每个块进行正交变换。嵌入部分使用加权序列将通过正交变换获得的变换系数序列的一部分嵌入与固有数字信息映射的伪随机数序列。在提取装置中，计算部分按照预定顺序从包含嵌入其中的伪随机数序列的数据读取各个块的变换系数序列，并计算变换系数序列与伪随机数序列之间的内积。当内积大于预定阈值时，确定部分确定伪随机数序列已被嵌入。生成部分提取用确定的伪随机数序列映射的固有数字信息。该方法阻止数字信息的解密，抑制图像质量恶化，提高水印数据的检测率。

12. 发明授权

US06477276B1 Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon 失效
标题翻译：用于嵌入和提取数字信息的装置和方法以及具有用于执行记录在其上的方法的程序的介质
公开(公告)号：US06477276B1
公开(公告)日：2002-11-05
申请号：US09186375
申请日：1998-11-05
申请人： Hisashi Inoue , Shiro Iwasaki , Mikio Shimazu , Shuichi Ojima , Takashi Katsura , Akio Miyazaki , Eiichi Hatae
发明人： Hisashi Inoue , Shiro Iwasaki , Mikio Shimazu , Shuichi Ojima , Takashi Katsura , Akio Miyazaki , Eiichi Hatae
IPC分类号： G06K936
CPC分类号： H04N19/645 , G06T1/005 , G06T2201/0051 , G06T2201/0052 , G06T2201/0061 , G06T2201/0065 , H04N1/32154 , H04N1/3216 , H04N1/32165 , H04N1/3217 , H04N1/32176 , H04N1/32187 , H04N1/32277 , H04N2201/3233 , H04N2201/327
摘要： An apparatus for embedding information in a signal includes a band dividing device, a block divider, a quantization portion, a signal replacement portion, a mean difference addition portion, a mean calculation portion, and a band synthesis portion. The band dividing device divides the signal into transform coefficients over a plurality of frequency bands. The block divider divides one frequency band into a plurality of blocks in accordance with a previously determined block size. The quantization portion calculates for each block, a mean value M of the transform coefficients in the block, and subjects the mean value M to linear quantization, using a previously determined quantization step-size Q to calculate a quantization value. The signal replacement portion replaces the quantization value for each block, on the basis of the quantization value and the value of the information to be embedded. The mean difference addition portion subjects the replaced quantization value, for each block, to inverse linear quantization using the quantization step-size Q to calculate a mean value M′, and adds a difference DM between the mean value M′ and the mean value M to all the transform coefficients in the block. The mean calculation portion calculates a mean value LM of the transform coefficients in the frequency band after the addition of the difference DM. The band synthesis portion reconstructs a signal in which the information has been embedded using the frequency band after the addition of the difference DM and the other frequency bands.
摘要翻译：用于在信号中嵌入信息的装置包括带分割装置，块分割器，量化部分，信号替换部分，平均差加法部分，平均计算部分和频带合成部分。频带划分装置将信号划分成多个频带的变换系数。块分割器根据先前确定的块大小将一个频带划分成多个块。量化部分针对每个块计算块中的变换系数的平均值M，并使用预先确定的量化步长Q对平均值M进行线性量化，以计算量化值。信号替换部分基于量化值和要嵌入的信息的值替换每个块的量化值。平均差分加法部分使用量化步长Q对每个块对替换的量化值进行逆线性量化，以计算平均值M'，并将平均值M'和平均值M 到块中的所有变换系数。平均计算部分计算差DM之后的频带中的变换系数的平均值LM。频带合成部分在添加差分DM和其他频带之后，使用频带重建信息已被嵌入的信号。

13. 发明授权

US07356700B2 Digital watermark-embedding apparatus and method, digital watermark-detecting apparatus and method, and recording medium 失效
标题翻译：数字水印嵌入装置和方法，数字水印检测装置和方法以及记录介质
公开(公告)号：US07356700B2
公开(公告)日：2008-04-08
申请号：US10654492
申请日：2003-09-04
申请人： Kenichi Noridomi , Hisashi Inoue , Takashi Katsura , Masataka Ejima
发明人： Kenichi Noridomi , Hisashi Inoue , Takashi Katsura , Masataka Ejima
IPC分类号： H04L9/00 , G06K9/46
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0052 , G06T2201/0061
摘要： A digital image signal is divided into blocks. Each of the divided blocks is subjected to orthogonal transformation. As a result, the divided blocks are transformed into several frequency components. One or more frequency components are selected in accordance with a characteristic amount that is extracted from the several frequency components. Values of the selected frequency components are operated under a predetermined rule in accordance with an embedment signal that is generated from embedment information.
摘要翻译：数字图像信号被分成块。对每个分割块进行正交变换。结果，分割的块被转换成多个频率分量。根据从多个频率分量中提取的特征量来选择一个或多个频率分量。所选择的频率分量的值根据从嵌入信息产生的嵌入信号在预定规则下操作。

14. 发明授权

US07003666B1 Apparatus and method for embedding information for tamper detection and detecting tamper and recording medium having program for carrying out the method recorded thereon 有权
标题翻译：用于嵌入用于篡改检测和检测篡改的信息的装置和方法，以及具有用于执行其上记录的方法的程序的记录介质
公开(公告)号：US07003666B1
公开(公告)日：2006-02-21
申请号：US09716221
申请日：2000-11-21
申请人： Hisashi Inoue , Takashi Katsura
发明人： Hisashi Inoue , Takashi Katsura
IPC分类号： H04L9/00 , H04L9/32
CPC分类号： G06T1/005 , G06T2201/0052 , G06T2201/0065
摘要： An object of the present invention is to provide an information embedding/tamper detecting apparatus and method capable of distinguishing between changes caused by image processing and intentional image tampering, and further capable of localizing, on a regional basis, a tampered position on an image. A tamper-detection-information embedding apparatus 1 divides the image into a plurality of frequency bands to obtain transform coefficients, and then generates a pseudo-random number series by using key data, and further generates authentication data. The key data and the authentication data are embedded in the transform coefficients of MRA and MRR, respectively. the image in which the information is embedded is reconstructed by using MRA and MRR. A tamper-detecting apparatus 2 extracts the key data from MRA obtained by dividing the image into frequency bands and generates the authentication data assumed to have been embedded, and further extracts the embedded information from MRR. The image is divided in to a plurality of blocks composed of a predetermined number of pixels. For each block, an information series embedded in the transform coefficients of MRR representing the same spatial region as the unit block is compared, for verification, with the corresponding authentication data series so that the tamper is determined on a regional basis.
摘要翻译：本发明的目的是提供一种能够区分由图像处理和有意图像篡改引起的变化的信息嵌入/篡改检测装置和方法，并且还能够在区域上本地化图像上的被篡改的位置。篡改检测信息嵌入装置1将图像划分为多个频带以获得变换系数，然后通过使用密钥数据生成伪随机数序列，并进一步生成认证数据。密钥数据和认证数据分别嵌入在MRA和MRR的变换系数中。通过使用MRA和MRR重建其中嵌入信息的图像。篡改检测装置2从通过将图像划分成频带而获得的MRA提取密钥数据，并生成假定已被嵌入的认证数据，并且进一步从MRR中提取嵌入信息。图像被划分为由预定数量的像素组成的多个块。对于每个块，将表示与单位块相同的空间区域的MRR的变换系数中嵌入的信息序列与相应的认证数据序列进行比较，以便在区域的基础上确定篡改。

15. 发明授权

US06898297B2 Digital watermark embedding method, digital watermark extracting method, recording medium, image recording device, and image replaying device 失效
标题翻译：数字水印嵌入方法，数字水印提取方法，记录介质，图像记录装置和图像重放装置
公开(公告)号：US06898297B2
公开(公告)日：2005-05-24
申请号：US09885730
申请日：2001-06-20
申请人： Takashi Katsura , Hisashi Inoue , Koji Sugishita
发明人： Takashi Katsura , Hisashi Inoue , Koji Sugishita
IPC分类号： G06T1/00 , G09C5/00 , G11B20/00 , H04N1/387 , H04N5/92 , H04N7/08 , H04N7/081 , G06K9/00
CPC分类号： G06T1/005 , G11B20/00086 , G11B20/00884
摘要： Embedding data to be embedded as a digital watermark is acquired. Packing data is formed in which the embedding data is repeatedly connected three times or more sequentially without interval. Real embedding information is formed such that a redundancy bit with a fixed length that is used for an error correction of an information bit is added immediately after the information bit in which the packing data is subdivided into data each having a fixed length. The real embedding information is embedded into the image data itself. The embedding mechanism for the information is not easily understood, and security level is high.
摘要翻译：嵌入作为数字水印嵌入的数据被获取。形成包装数据，其中嵌入数据在不间隔的情况下重复连接三次或更多次。形成实际嵌入信息，使得在将打包数据细分为具有固定长度的数据的信息位之后立即添加用于信息位的纠错的固定长度的冗余位。真正的嵌入信息被嵌入到图像数据本身中。信息的嵌入机制不容易理解，安全级别很高。

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