公开(公告)号：US20090196500A1

公开(公告)日：2009-08-06

申请号：US12363344

申请日：2009-01-30

申请人： Yun-Qing Shi ,  GuoRong Xuan

发明人： Yun-Qing Shi ,  GuoRong Xuan

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0083 ,  G06T2201/0203

摘要： A method of hiding data comprising creating a histogram of an attribute of a first data set. The histogram includes occurrences of the attribute. Two adjacent occurrences are selected where a count of one of the two adjacent occurrences is zero. A second data set is embedded in data of the first data set associated with the selected adjacent occurrences.

摘要翻译： 一种隐藏数据的方法，包括创建第一数据集的属性的直方图。 直方图包括属性的出现。 选择两个相邻出现次数，其中两个相邻出现中的一个的计数为零。 将第二数据集嵌入与所选择的相邻出现相关联的第一数据集的数据中。

公开(公告)号：US20090116685A1

公开(公告)日：2009-05-07

申请号：US12244453

申请日：2008-10-02

申请人： Chang-Dong Yoo ,  Sun-Il Lee

发明人： Chang-Dong Yoo ,  Sun-Il Lee

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0083 ,  G06T2201/0203

摘要： Enhanced method for embedding watermarks based on integer-to-integer wavelet transform is provided. The method according to the present invention includes the steps of: (A) dividing an original image (X×Y) to a plurality of image blocks (M×N); (B) selecting image blocks for embedding an location information that indicates image blocks to be watermarked;(C) embedding the location information into the image blocks selected in the step (B); and (D) embedding watermarks into remaining image blocks which are not selected in the step (B).

摘要翻译： 提供了一种基于整数小波变换嵌入水印的增强方法。 根据本发明的方法包括以下步骤：（A）将原始图像（XxY）分割成多个图像块（MxN）; （B）选择用于嵌入指示要加密水印的图像块的位置信息的图像块;（C）将位置信息嵌入到在步骤（B）中选择的图像块中; 和（D）将水印嵌入到在步骤（B）中未被选择的剩余图像块中。

公开(公告)号：US20090070075A1

公开(公告)日：2009-03-12

申请号：US12204309

申请日：2008-09-04

申请人： Wolfgang Funk

发明人： Wolfgang Funk

IPC分类号： G06F17/50 ,  G06F19/00

CPC分类号： G06T1/0028 ,  G06T17/30 ,  G06T2201/0051 ,  G06T2201/0203

摘要： A watermark is embossed into a model of a linear or surface shape, especially a non-uniform rational B-splines model. The model has a plurality of splines, the combination of which forms the shape. Control points are assigned to the splines such that a course of the respectively associated spline can be modified and thus be controlled by changing the position of the control points and/or weights of the control points. Nodes which are located in a section of the shape that is formed by the respectively associated spline are allocated to the splines. In order to change the shape (the modified curve runs through point Cmod) when a watermark is embossed into the model, the position of at least one control point is modified, the weight by which a control point affects the shape and thus influences at least one area of the shape is modified, and/or an additional control point is inserted into the model. At least one additional node is inserted into the model (new node at u=1.1875 on the modified curve) in order to obtain information on how the change of the shape can be reversed.

摘要翻译： 水印被压印成线性或表面形状的模型，特别是非均匀有理B样条模型。 该模型具有多个花键，其组合形成形状。 控制点被分配给样条，使得可以修改分别相关联的样条的过程，并且因此通过改变控制点的位置和/或控制点的权重来控制。 位于由分别相关联的样条线形成的形状的部分中的节点被分配给样条。 为了在水印被压印到模型中时改变形状（修改后的曲线贯穿点Cmod），至少一个控制点的位置被修改，控制点对其形状的影响至少影响至少 形状的一个区域被修改，和/或附加的控制点被插入到模型中。 在模型中插入至少一个附加节点（修改曲线上的u = 1.1875处的新节点），以获得关于形状变化如何反转的信息。

公开(公告)号：US07269272B2

公开(公告)日：2007-09-11

申请号：US10600532

申请日：2003-06-23

申请人： Tomochika Murakami

发明人： Tomochika Murakami

IPC分类号： G06K9/00 ,  G06K15/00

CPC分类号： G06T1/0092 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0083 ,  G06T2201/0203

摘要： This invention can multiplex noise in multilevel image data to reversibly embed visible additional information with a noise-multiplexed distribution while maintaining the atmosphere of the multilevel image data subjected to embedding. For this purpose, when noise is multiplexed on multilevel image data to embed visible additional information with a noise-multiplexed distribution, information representing whether or not to multiplex noise for each pixel is input as the additional information. Whether a pixel of interest in the multilevel image data is located at a position where noise is to be multiplexed is determined on the basis of the additional information (S106). When the pixel of interest is determined to be located at the position where noise is to be multiplexed, a bit region where noise is to be multiplexed in the pixel of interest is specified on the basis of data in a region near the pixel of interest (S110). Bit information is reversibly changed in the specified bit region of the pixel of interest (S112, S114).

摘要翻译： 本发明可以对多级图像数据中的噪声进行多路复用，以可逆地嵌入具有噪声多路复用分布的可见附加信息，同时保持经受嵌入的多级图像数据的气氛。 为此，当噪声多路复用在多电平图像数据上以嵌入具有噪声多路复用分布的可见附加信息时，输入表示是否对每个像素复用噪声的信息作为附加信息。 基于附加信息确定多级图像数据中感兴趣的像素是否位于要复用噪声的位置（S106）。 当感兴趣的像素被确定为位于要复用噪声的位置时，基于感兴趣像素附近的区域中的数据指定要在感兴趣像素中复用噪声的位区域 S 110）。 位信息在感兴趣像素的指定位区域中可逆地改变（S 112，S 114）。

公开(公告)号：US07269271B2

公开(公告)日：2007-09-11

申请号：US10377929

申请日：2003-02-27

申请人： Steven J Harrington

发明人： Steven J Harrington

IPC分类号： G06K9/00 ,  G06K9/36 ,  G06K15/00

CPC分类号： G06T1/0071 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0083 ,  G06T2201/0203

摘要： A first digital image is combined with a transformed first digital image to authenticate and reconstruct the first digital image. When viewed in the standard manner, the combined image appears to be the first digital image. The transformed first digital image cannot be seen. When the bits within each pixel of the combined image are reversed, i.e. the least significant bit (LSB) is exchanged with the most significant bit (MSB), and the resultant image is viewed, then the transformed first digital image is seen. In this way, the transformed first digital image can be hidden inside the noise bits of the first digital image. The method is applied to color pixels by treating each color byte independently. The transformed first digital image can be encrypted before combining with the first digital image. The transformed first digital image can be inversely transformed back to the first digital image for authentication and reconstruction.

摘要翻译： 第一数字图像与变换的第一数字图像组合以认证和重建第一数字图像。 当以标准方式观看时，组合图像看起来是第一个数字图像。 转换的第一个数字图像不能被看到。 当组合图像的每个像素内的位相反时，即最低有效位（LSB）与最高有效位（MSB）交换，并且看到所得到的图像，则可以看到变换的第一数字图像。 以这种方式，变换的第一数字图像可以被隐藏在第一数字图像的噪声比特内。 该方法通过独立处理每个颜色字节应用于彩色像素。 经转换的第一数字图像可以在与第一数字图像组合之前进行加密。 经变换的第一数字图像可以逆向转换回第一数字图像进行认证和重构。

公开(公告)号：US20070071280A1

公开(公告)日：2007-03-29

申请号：US11292740

申请日：2005-12-02

申请人： Jessica Fridrich ,  Miroslav Goljan ,  Rui Du

发明人： Jessica Fridrich ,  Miroslav Goljan ,  Rui Du

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T2201/0083 ,  G06T2201/0203 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32251 ,  H04N1/32341 ,  H04N1/32347

摘要： Current methods of embedding hidden data in an image inevitably distort the original image by noise. This distortion cannot generally be removed completely because of quantization, bit-replacement, or truncation at the grayscales 0 and 255. The distortion, though often small, may make the original image unacceptable for medical applications, or for military and law enforcement applications where an image must be inspected under unusual viewing conditions (e.g., after filtering or extreme zoom). The present invention provides high-capacity embedding of data that is lossless (or distortion-free) because, after embedded information is extracted from a cover image, we revert to an exact copy of the original image before the embedding took place. This new technique is a powerful tool for a variety of tasks, including lossless robust watermarking, lossless authentication with fragile watermarks, and steganalysis. The technique is applicable to raw, uncompressed formats (e.g., BMP, PCX, PGM, RAS, etc.), lossy image formats (JPEG, JPEG2000, wavelet), and palette formats (GIF, PNG).

摘要翻译： 将隐藏数据嵌入到图像中的当前方法不可避免地使噪声原始图像失真。 由于在灰度0和255处的量化，位替换或截断，这种失真通常不能被完全去除。失真尽管经常很小，但可能会使原始图像对于医疗应用或军事和执法应用而言是不可接受的，其中 必须在异常观看条件下检查图像（例如，过滤或极大变焦后）。 本发明提供了无损（或无失真）的数据的高容量嵌入，因为在从封面图像提取嵌入信息之后，在嵌入发生之前，我们恢复原始图像的精确拷贝。 这种新技术是用于各种任务的强大工具，包括无损鲁棒水印，易损水印的无损认证和隐写分析。 该技术适用于原始的未压缩格式（例如BMP，PCX，PGM，RAS等），有损图像格式（JPEG，JPEG 2000，小波）和调色板格式（GIF，PNG）。

公开(公告)号：US20050259844A1

公开(公告)日：2005-11-24

申请号：US10958033

申请日：2004-10-04

申请人： Alex Kot ,  Huijuan Yang ,  Haiping Lu

发明人： Alex Kot ,  Huijuan Yang ,  Haiping Lu

IPC分类号： G06K9/00 ,  G06T1/00

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0083 ,  G06T2201/0203

摘要： A method of embedding watermark data into a two-colour (binary) image includes dividing the image into blocks and assessing the suitability of each block to embed a bit of watermark data by assessing whether or not the flipping of a defined pixel in each block affects the visual attributes of said block in manner to be perceptible by the human eye. Data is only embedded in those blocks determined to be suitable for data embedding, by flipping the defined pixel, as required. A recipient of the document may similarly assess which blocks contain watermark data, by assessing the suitability of each block in the document to embed such data. Conveniently, watermark data may be extracted without further information about the data's location within a document.

摘要翻译： 将水印数据嵌入到双色（二进制）图像中的方法包括将图像划分成块并通过评估每个块中定义的像素的翻转是否影响来评估每个块嵌入水印数据位的适合性 所述块的视觉属性以人眼可察觉的方式。 通过根据需要翻转定义的像素，数据仅嵌入确定为适合于数据嵌入的块中。 通过评估文档中每个块的适用性以嵌入这些数据，文档的接收者可以类似地评估哪些块包含水印数据。 方便地，可以提取水印数据而无需关于文档内的数据位置的进一步信息。

公开(公告)号：US20050244032A1

公开(公告)日：2005-11-03

申请号：US11068063

申请日：2005-02-28

申请人： Yun-Qing Shi ,  Guorong Xuan

发明人： Yun-Qing Shi ,  Guorong Xuan

IPC分类号： G06K9/00 ,  G06K9/36 ,  G06T1/00 ,  H04N1/32 ,  H04N7/26

CPC分类号： G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0083 ,  G06T2201/0203 ,  H04N1/3217 ,  H04N1/32187 ,  H04N19/467 ,  H04N19/63 ,  H04N21/23892 ,  H04N21/8358 ,  H04N2201/3233 ,  H04N2201/327

摘要： A system and method are disclosed which may include subjecting an original, pixel domain image to an Integer Wavelet Transform (IWT) to obtain a matrix of IWT coefficients; selecting a plurality of the IWT coefficients for incorporation of information therein; and setting signs for the plurality of selected IWT coefficients according to bit values of a plurality of respective data bits. The system and method can also include subjecting a marked pixel domain image to an Integer Wavelet Transform to obtain a matrix of wavelet coefficients; selecting a plurality of the coefficients from the matrix that contain embedded information; and for each selected coefficient, extracting the data bit embedded in the coefficient, a bit value of the extracted data bit determined based on a sign of the coefficient.

摘要翻译： 公开了一种系统和方法，其可以包括使原始像素域图像经受整数小波变换（IWT），以获得IWT系数矩阵; 选择多个IWT系数以便在其中合并信息; 以及根据多个相应的数据比特的比特值来设置多个所选IWT系数的符号。 该系统和方法还可以包括将标记像素域图像进行整数小波变换以获得小波系数矩阵; 从包含嵌入信息的矩阵中选择多个系数; 并且对于每个选择的系数，提取嵌入在系数中的数据位，基于系数的符号确定的提取的数据位的位值。

公开(公告)号：US20050219080A1

公开(公告)日：2005-10-06

申请号：US10517922

申请日：2003-06-11

申请人： Antonius Adrianus Cornelis Kalker ,  Franciscus Maria Willems

发明人： Antonius Adrianus Cornelis Kalker ,  Franciscus Maria Willems

IPC分类号： G06T1/00 ,  H04N1/32 ,  H04N1/387 ,  H03M7/00

CPC分类号： G06T1/0028 ,  G06T2201/0083 ,  G06T2201/0203 ,  H04N1/32144 ,  H04N1/32347

摘要： An undesirable side effect of watermarking or data-hiding schemes is that the host signal is distorted. This invention discloses a reversible or lossless data-hiding scheme, which allows complete and blind (without additional signaling) reconstruction of the host signal (X). This is achieved by accommodating, in the embedded data (d) of the watermarked signal (Y), restoration data (r) that identifies the host signal, given the composite signal, i.e. the restoration data identifies (24) which modifications the host signal has undergone during embedding (23). The restoration data is accommodated in a portion of the embedding capacity of a conventional embedder (23). The remainder of the capacity is used for embedding payload (w).

摘要翻译： 水印或数据隐藏方案的不良副作用是主机信号失真。 本发明公开了一种可逆或无损数据隐藏方案，其允许主机信号（X）的完整和盲（重新信令）重建。 这通过在给定复合信号的情况下适应水印信号（Y）的嵌入数据（d），识别主机信号的恢复数据（r）来实现，即恢复数据标识（24），其修改主机信号 在嵌入过程中经历了（23）。 恢复数据被容纳在常规嵌入器（23）的嵌入容量的一部分中。 容量的剩余部分用于嵌入有效载荷（w）。

公开(公告)号：US06940996B2

公开(公告)日：2005-09-06

申请号：US10915829

申请日：2004-08-11

申请人： Tetsujiro Kondo ,  Naoki Kobayashi

发明人： Tetsujiro Kondo ,  Naoki Kobayashi

IPC分类号： H04N7/50 ,  G06T1/00 ,  G06K9/00 ,  G06K9/36 ,  G06K9/68

CPC分类号： G06T1/0035 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0065 ,  G06T2201/0203

摘要： An image processing apparatus embeds information into image data without an overhead. The image processing apparatus includes a selection unit for selecting some of the pixels forming the image data. A changing unit embeds the information into the pixels selected by the selection unit by swapping the bits of the values of the selected pixels according to the information.