公开(公告)号：US07817818B2

公开(公告)日：2010-10-19

申请号：US11412210

申请日：2006-04-25

申请人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0061 ,  G06T2201/0083 ,  G06T2201/0202 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32293 ,  H04N2201/3233 ,  H04N2201/327

摘要： A method for embedding a watermark into digital data, when the watermark is to be embedded in a digital image, independently changes real number components and imaginary number components of each of coefficient values of a complex watermark coefficient matrix using key, from the watermark to be embedded in the digital image, a step for performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern; and a step for adding like tiling the water mark pattern to the original image, and generating an embedded image.Further more, a watermark detection method for detecting a watermark from a digital data, a step for separating a block from an arbitrary position on the detected object image, a step for performing a discrete Fourier transform on the block and obtaining a sequence matrix, a step for generating position information for a component that is to be detected and that is specified by the key, a step for detecting a position marker sequence by calculating a phase difference of a sequence by an amount of parallel displacement, for each item of the position information, and extracting offset information which is the amount of parallel displacement when there is agreement between a start point of an embedded watermark and a start point of the block cut from the detected object image, and a step for detecting the embedded watermark cut from the detected object image.

摘要翻译： 一种将水印嵌入数字数据的方法，当将水印嵌入到数字图像中时，使用密钥从水印中独立地改变复数水印系数矩阵的每个系数值的实数分量和虚数分量， 嵌入在数字图像中的步骤，用于对改变的水印的序列矩阵执行离散傅立叶逆变换并产生水印图案; 以及将水印图案拼贴到原始图像上的添加步骤，以及生成嵌入图像。 此外，还提供了一种用于从数字数据中检测水印的水印检测方法，用于从检测到的对象图像上的任意位置分离块的步骤，对该块执行离散付里叶变换并获得序列矩阵的步骤， 用于生成要被检测并由密钥指定的组件的位置信息的步骤，用于通过针对每个位置的项目计算一个序列的平均位移量来检测位置标记序列的步骤 信息，并且提取作为在嵌入水印的开始点与从检测到的对象图像切割的块的开始点之间一致时的平行位移量的偏移信息，以及用于检测从检测到的对象图像切入的嵌入水印的步骤 检测到物体图像。

公开(公告)号：US07640431B2

公开(公告)日：2009-12-29

申请号：US10634155

申请日：2003-08-04

申请人： Hiroshi Ogawa ,  Takao Nakamura ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Hiroshi Ogawa ,  Takao Nakamura ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： H04L9/32

CPC分类号： G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0083 ,  H04N1/32154 ,  H04N19/467

摘要： A method for embedding digital watermark data in digital data contents includes the steps of obtaining a frequency coefficient of block data of digital data contents, obtaining a complexity of the block data, obtaining an amount of transformation of the frequency coefficient from the complexity and the digital watermark data, and embedding the digital watermark data by transforming the frequency coefficient. In addition, a method for reading digital watermark data includes the steps of calculating a probability of reading ‘1’ or ‘0’ in a read bit sequence by using a test method on the basis of binary distribution, determining the presence or absence of digital watermark data according to the probability, and reconstituting digital watermark data. Another method includes the steps of performing soft decision in code theory by assigning weights to the digital watermark sequence with a weighting function, and reconstituting digital watermark data.

摘要翻译： 一种用于将数字水印数据嵌入数字数据内容的方法包括以下步骤：获得数字数据内容的块数据的频率系数，获得块数据的复杂度，从复杂度获得频率系数的变换量和数字 水印数据，并通过变换频率系数嵌入数字水印数据。 此外，读取数字水印数据的方法包括以下步骤：通过使用基于二进制分布的测试方法来计算读取比特序列中的“1”或“0”的概率，确定是否存在数字 水印数据根据概率，并重构数字水印数据。 另一种方法包括以下步骤：通过对具有加权函数的数字水印序列赋予权重，并重构数字水印数据，在代码理论中进行软判决。

公开(公告)号：US07978877B2

公开(公告)日：2011-07-12

申请号：US12806241

申请日：2010-08-06

申请人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0061 ,  G06T2201/0083 ,  G06T2201/0202 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32293 ,  H04N2201/3233 ,  H04N2201/327

摘要： A method for embedding a watermark into digital data, when the watermark is to be embedded in a digital image, independently changes real number components and imaginary number components of each of coefficient values of a complex watermark coefficient matrix using key, from the watermark to be embedded in the digital image, a step for performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern; and a step for adding like tiling the water mark pattern to the original image, and generating an embedded image.Further more, a watermark detection method for detecting a watermark from a digital data, a step for separating a block from an arbitrary position on the detected object image, a step for performing a discrete Fourier transform on the block and obtaining a sequence matrix, a step for generating position information for a component that is to be detected and that is specified by the key, a step for detecting a position marker sequence by calculating a phase difference of a sequence by an amount of parallel displacement, for each item of the position information, and extracting offset information which is the amount of parallel displacement when there is agreement between a start point of an embedded watermark and a start point of the block cut from the detected object image, and a step for detecting the embedded watermark cut from the detected object image.

公开(公告)号：US07072492B2

公开(公告)日：2006-07-04

申请号：US10634584

申请日：2003-08-04

申请人： Hiroshi Ogawa ,  Takao Nakamura ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Hiroshi Ogawa ,  Takao Nakamura ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0083 ,  H04N1/32154 ,  H04N19/467

摘要： A method for embedding digital watermark data in digital data contents includes the steps of obtaining a frequency coefficient of block data of digital data contents, obtaining a complexity of the block data, obtaining an amount of transformation of the frequency coefficient from the complexity and the digital watermark data, and embedding the digital watermark data by transforming the frequency coefficient. In addition, a method for reading digital watermark data includes the steps of calculating a probability of reading ‘1’ or ‘0’ in a read bit sequence by using a test method on the basis of binary distribution, determining the presence or absence of digital watermark data according to the probability, and reconstituting digital watermark data. Another method includes the steps of performing soft decision in code theory by assigning weights to the digital watermark sequence with a weighting function, and reconstituting digital watermark data.

公开(公告)号：US07860270B2

公开(公告)日：2010-12-28

申请号：US12590806

申请日：2009-11-13

申请人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0061 ,  G06T2201/0083 ,  G06T2201/0202 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32293 ,  H04N2201/3233 ,  H04N2201/327

摘要： A method for embedding a watermark into digital data by independently changing real and imaginary number components of the coefficient values of a complex watermark coefficient matrix using a key, performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern, adding like tiling the water mark pattern to the original image, and generating an embedded image. A watermark detection method includes separating a block from an arbitrary position on the detected object image, performing a discrete Fourier transform on the block and obtaining a sequence matrix, generating position information for a component which is to be detected and is specified by the key, detecting a position marker sequence by calculating a phase difference of a sequence by a parallel displacement, for the position information, extracting offset information, and detecting the embedded watermark from the detected object image.

摘要翻译： 一种用于通过使用密钥独立地改变复数水印系数矩阵的系数值的实数和虚数分量来将水印嵌入数字数据的方法，对改变的水印的序列矩阵执行离散付里叶逆变换并产生水印图案 添加像平铺水印图案到原始图像，并生成嵌入图像。 一种水印检测方法，包括从检测对象图像上的任意位置分离块，在块上执行离散付里叶变换并获得序列矩阵，生成要被检测并由密钥指定的分量的位置信息， 通过平行位移计算序列的相位差，对所述位置信息，提取偏移信息以及从检测到的对象图像中检测嵌入的水印来检测位置标记序列。

公开(公告)号：US20100131768A1

公开(公告)日：2010-05-27

申请号：US12590612

申请日：2009-11-09

申请人： Hiroshi Ogawa ,  Takao Nakamura ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Hiroshi Ogawa ,  Takao Nakamura ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： H04L9/32 ,  G09C5/00

CPC分类号： G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0083 ,  H04N1/32154 ,  H04N19/467

摘要： A method for embedding digital watermark data in digital data contents includes the steps of obtaining a frequency coefficient of block data of digital data contents, obtaining a complexity of the block data, obtaining an amount of transformation of the frequency coefficient from the complexity and the digital watermark data, and embedding the digital watermark data by transforming the frequency coefficient. In addition, a method for reading digital watermark data includes the steps of calculating a probability of reading ‘1’ or ‘0’ in a read bit sequence by using a test method on the basis of binary distribution, determining the presence or absence of digital watermark data according to the probability, and reconstituting digital watermark data. Another method includes the steps of performing soft decision in code theory by assigning weights to the digital watermark sequence with a weighting function, and reconstituting digital watermark data.

摘要翻译： 一种用于将数字水印数据嵌入数字数据内容的方法包括以下步骤：获得数字数据内容的块数据的频率系数，获得块数据的复杂度，从复杂度获得频率系数的变换量和数字 水印数据，并通过变换频率系数嵌入数字水印数据。 此外，读取数字水印数据的方法包括以下步骤：通过使用基于二进制分布的测试方法来计算读取比特序列中的“1”或“0”的概率，确定是否存在数字 水印数据根据概率，并重构数字水印数据。 另一种方法包括以下步骤：通过对具有加权函数的数字水印序列赋予权重，并重构数字水印数据，在代码理论中进行软判决。

公开(公告)号：US20100119106A1

公开(公告)日：2010-05-13

申请号：US12590806

申请日：2009-11-13

申请人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0061 ,  G06T2201/0083 ,  G06T2201/0202 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32293 ,  H04N2201/3233 ,  H04N2201/327

摘要： A method for embedding a watermark into digital data, when the watermark is to be embedded in a digital image, independently changes real number components and imaginary number components of each of coefficient values of a complex watermark coefficient matrix using key, from the watermark to be embedded in the digital image, a step for performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern; and a step for adding like tiling the water mark pattern to the original image, and generating an embedded image.Further more, a watermark detection method for detecting a watermark from a digital data, a step for separating a block from an arbitrary position on the detected object image, a step for performing a discrete Fourier transform on the block and obtaining a sequence matrix, a step for generating position information for a component that is to be detected and that is specified by the key, a step for detecting a position marker sequence by calculating a phase difference of a sequence by an amount of parallel displacement, for each item of the position information, and extracting offset information which is the amount of parallel displacement when there is agreement between a start point of an embedded watermark and a start point of the block cut from the detected object image, and a step for detecting the embedded watermark cut from the detected object image.

公开(公告)号：US20050175214A1

公开(公告)日：2005-08-11

申请号：US10634155

申请日：2003-08-04

申请人： Hiroshi Ogawa ,  Takao Nakamura ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Hiroshi Ogawa ,  Takao Nakamura ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： G06T1/00 ,  H04N1/32 ,  G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0083 ,  H04N1/32154 ,  H04N19/467

摘要： A method for embedding digital watermark data in digital data contents includes the steps of obtaining a frequency coefficient of block data of digital data contents, obtaining a complexity of the block data, obtaining an amount of transformation of the frequency coefficient from the complexity and the digital watermark data, and embedding the digital watermark data by transforming the frequency coefficient. In addition, a method for reading digital watermark data includes the steps of calculating a probability of reading ‘1’ or ‘0’ in a read bit sequence by using a test method on the basis of binary distribution, determining the presence or absence of digital watermark data according to the probability, and reconstituting digital watermark data. Another method includes the steps of performing soft decision in code theory by assigning weights to the digital watermark sequence with a weighting function, and reconstituting digital watermark data.

摘要翻译： 一种用于将数字水印数据嵌入数字数据内容的方法包括以下步骤：获得数字数据内容的块数据的频率系数，获得块数据的复杂度，从复杂度获得频率系数的变换量和数字 水印数据，并通过变换频率系数嵌入数字水印数据。 此外，读取数字水印数据的方法包括以下步骤：通过使用基于二进制分布的测试方法来计算读取比特序列中的“1”或“0”的概率，确定是否存在数字 水印数据根据概率，并重构数字水印数据。 另一种方法包括以下步骤：通过对具有加权函数的数字水印序列赋予权重，并重构数字水印数据，在代码理论中进行软判决。

公开(公告)号：US07792323B2

公开(公告)日：2010-09-07

申请号：US11412151

申请日：2006-04-25

申请人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0061 ,  G06T2201/0083 ,  G06T2201/0202 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32293 ,  H04N2201/3233 ,  H04N2201/327

摘要： A method for embedding a watermark into digital data, when the watermark is to be embedded in a digital image, independently changes real number components and imaginary number components of each of coefficient values of a complex watermark coefficient matrix using key, from the watermark to be embedded in the digital image, a step for performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern; and a step for adding like tiling the water mark pattern to the original image, and generating an embedded image.Further more, a watermark detection method for detecting a watermark from a digital data, a step for separating a block from an arbitrary position on the detected object image, a step for performing a discrete Fourier transform on the block and obtaining a sequence matrix, a step for generating position information for a component that is to be detected and that is specified by the key, a step for detecting a position marker sequence by calculating a phase difference of a sequence by an amount of parallel displacement, for each item of the position information, and extracting offset information which is the amount of parallel displacement when there is agreement between a start point of an embedded watermark and a start point of the block cut from the detected object image, and a step for detecting the embedded watermark cut from the detected object image.

公开(公告)号：US20110116679A1

公开(公告)日：2011-05-19

申请号：US12806241

申请日：2010-08-06

申请人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

发明人： Takao Nakamura ,  Hiroshi Ogawa ,  Atsuki Tomioka ,  Youichi Takashima

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0052 ,  G06T2201/0061 ,  G06T2201/0083 ,  G06T2201/0202 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32293 ,  H04N2201/3233 ,  H04N2201/327

摘要： A method for embedding a watermark into digital data, when the watermark is to be embedded in a digital image, independently changes real number components and imaginary number components of each of coefficient values of a complex watermark coefficient matrix using key, from the watermark to be embedded in the digital image, a step for performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern; and a step for adding like tiling the water mark pattern to the original image, and generating an embedded image.Further more, a watermark detection method for detecting a watermark from a digital data, a step for separating a block from an arbitrary position on the detected object image, a step for performing a discrete Fourier transform on the block and obtaining a sequence matrix, a step for generating position information for a component that is to be detected and that is specified by the key, a step for detecting a position marker sequence by calculating a phase difference of a sequence by an amount of parallel displacement, for each item of the position information, and extracting offset information which is the amount of parallel displacement when there is agreement between a start point of an embedded watermark and a start point of the block cut from the detected object image, and a step for detecting the embedded watermark cut from the detected object image.

摘要翻译： 一种将水印嵌入数字数据的方法，当将水印嵌入到数字图像中时，使用密钥从水印中独立地改变复数水印系数矩阵的每个系数值的实数分量和虚数分量， 嵌入在数字图像中的步骤，用于对改变的水印的序列矩阵执行离散傅立叶逆变换并产生水印图案; 以及将水印图案拼贴到原始图像上的添加步骤，以及生成嵌入图像。 此外，还提供了一种用于从数字数据中检测水印的水印检测方法，用于从检测到的对象图像上的任意位置分离块的步骤，对该块执行离散付里叶变换并获得序列矩阵的步骤， 用于生成要被检测并由密钥指定的组件的位置信息的步骤，用于通过针对每个位置的项目计算一个序列的平均位移量来检测位置标记序列的步骤 信息，并且提取作为在嵌入水印的开始点与从检测到的对象图像切割的块的开始点之间一致时的平行位移量的偏移信息，以及用于检测从被检测对象图像切入的嵌入水印的步骤 检测到物体图像。