公开(公告)号：US20050157907A1

公开(公告)日：2005-07-21

申请号：US10826970

申请日：2004-04-15

申请人： Alastair Reed ,  Eliot Rogers

发明人： Alastair Reed ,  Eliot Rogers

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

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0202 ,  H04N1/32149 ,  H04N1/32192 ,  H04N1/32229 ,  H04N1/32309 ,  H04N1/3232

摘要： A digital watermarking system uses a model of a rendering device to take into account the impact of the rendering device on visual or auditory quality of the watermarked signal. For visual content, a reference image and watermarked image are passed through the model and then supplied to a visual quality metric that assesses the visibility of the watermark. The digital watermark embedding is adjusted iteratively with each pass through this process to produce a watermarked signal that has the desired visual quality.

摘要翻译： 数字水印系统使用渲染设备的模型来考虑渲染设备对水印信号的视觉或听觉质量的影响。 对于视觉内容，参考图像和水印图像通过模型，然后提供给用于评估水印可见性的视觉质量度量。 每次通过该过程，迭代地调整数字水印嵌入，以产生具有期望视觉质量的水印信号。

公开(公告)号：US20080036886A1

公开(公告)日：2008-02-14

申请号：US11748851

申请日：2007-05-15

申请人： Brett Hannigan ,  Alastair Reed

发明人： Brett Hannigan ,  Alastair Reed

IPC分类号： H04N9/083

CPC分类号： G06K9/00 ,  G06T3/4007 ,  G06T3/4015

摘要： Slight camera movement between capture of successive images is advantageously utilized to minimize or eliminate the need to interpolate in order to fill in the “holes” in a Bayer pattern. The captured color values from multiple appropriately positioned images are used to fill these holes. For example, instead of interpolating the value of red for the second pixel position on the first row of a Bayer pattern, an image is selected which is positioned one pixel to the right of the first image, and the red vales from this image are used for the red values of the second pixel on the first line. Values of the pixels in multiple images which are appropriately aligned to each pixel position are averaged to generate a better value for each pixel position. Information carried by a digital watermark (either alone or together with other techniques) is used to determine the alignment of the images. Images are selected which are positioned so that corresponding pixels fall within a specified tolerance from a location in a Bayer pattern. The pixel values of the images which fall within the specified tolerance of each pixel position in a Bayer pattern are selected and used for the alignment.

摘要翻译： 有利地利用连续图像的拍摄之间的轻微的相机移动来最小化或消除内插的需要，以填充拜耳图案中的“孔”。 来自多个适当定位的图像的捕获的颜色值用于填充这些孔。 例如，代替内插Bayer图案的第一行上的第二像素位置的红色值，选择位于第一图像右侧一个像素的图像，并且使用来自该图像的红色值 对于第一行上第二个像素的红色值。 对与每个像素位置适当对齐的多个图像中的像素的值进行平均以为每个像素位置产生更好的值。 使用数字水印（单独或与其他技术一起）携带的信息来确定图像的对准。 被选择的图像被定位成使得相应的像素落在从拜耳图案中的位置指定的公差范围内。 落在拜耳图案中的每个像素位置的指定公差内的图像的像素值被选择并用于对准。

公开(公告)号：US20060028689A1

公开(公告)日：2006-02-09

申请号：US10639598

申请日：2003-08-11

申请人： Burt Perry ,  Sean Calhoon ,  Alastair Reed ,  Kenneth Levy ,  Tim Schoenheit ,  Geoffrey Rhoads

发明人： Burt Perry ,  Sean Calhoon ,  Alastair Reed ,  Kenneth Levy ,  Tim Schoenheit ,  Geoffrey Rhoads

IPC分类号： H04N1/40

CPC分类号： H04N1/32144 ,  H04N2201/327

摘要： This disclosure details systems and methods for embedding and reading auxiliary code signals in documents, and for using the code signals to enable a variety of forensic tracking, monitoring and usage control functions.

摘要翻译： 该公开内容详细描述了在文档中嵌入和读取辅助代码信号的系统和方法，并且使用代码信号来实现多种取证跟踪，监视和使用控制功能。

公开(公告)号：US4924388A

公开(公告)日：1990-05-08

申请号：US140847

申请日：1988-01-05

申请人： Peter W. Stansfield ,  Alastair Reed

发明人： Peter W. Stansfield ,  Alastair Reed

IPC分类号： G06T3/20 ,  G06T3/00

CPC分类号： G06T3/00

摘要： Apparatus for modifying part of an image represented digitally in the frequency domain comprises a first memory for storing a representation of the image digitally in the frequency domain as at least one first block of data locations containing frequency coefficient data. A second memory is provided for storing a representation of the image part in the frequency domain by second blocks of data locations containing frequency coefficient data, the first and second blocks representing, after conversion to the spatial domain, spatially shifted versions of the image part relative to a fixed spatial co-ordinate system. A suitably programmed computer applies a predetermined shift function defined in the frequency domain to the (or each) first block of data stored in the first memory to generate the (or each) second block, and stores the resultant second blocks of data in the second memory.

公开(公告)号：US4879594A

公开(公告)日：1989-11-07

申请号：US248072

申请日：1988-09-23

申请人： Peter W. Stansfield ,  Alastair Reed

发明人： Peter W. Stansfield ,  Alastair Reed

IPC分类号： H04N1/46 ,  G03F3/08 ,  G06T1/00 ,  G06T1/20 ,  H04N1/54

CPC分类号： H04N1/54

摘要： A method and apparatus for reproducing a colored original image represented by first signals defining the color content of pixels of the original image in terms of a first set of color components. The colored original image is reproduced using at least two separations representing respective color components of a second set which is different from the first set. The color components of the second set are ranked in order of similarity to each pixel and a value is selected for the highest ranked color component for which each of the first set of color component values defining said selected color component does not exceed the corresponding pixel values. The pixel values are then adjusted to take account of the select value of the color component of the second set. The process is then repeated for each of the remaining color components of the second set in the order of ranking.

公开(公告)号：US20070183622A1

公开(公告)日：2007-08-09

申请号：US11498528

申请日：2006-08-02

申请人： Brett Hannigan ,  Alastair Reed ,  Brett Bradley

发明人： Brett Hannigan ,  Alastair Reed ,  Brett Bradley

IPC分类号： G06K9/00 ,  G06K9/36

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  H04N1/3216 ,  H04N1/32165 ,  H04N1/3217 ,  H04N1/32187 ,  H04N1/32192

摘要： The present invention relates generally to steganography and data hiding. In one embodiment a method is provided including obtaining a media signal; determining characteristics of the media signal; based at least in part on the characteristics of the media signal, providing a map of the media signal; transforming at least some portions of the media signal into a transform domain; and hiding plural-bit data in at least some portions of the transformed media signal. The map identifies at least one area in the media signal in which hiding of plural-bit data should be avoided or suppressed. At least one of the act of transforming or the act of hiding utilizes the map of the media signal. Other embodiments are also provided.

摘要翻译： 本发明一般涉及隐写术和数据隐藏。 在一个实施例中，提供了一种方法，包括获得媒体信号; 确定媒体信号的特性; 至少部分地基于媒体信号的特性，提供媒体信号的映射; 将所述媒体信号的至少一些部分转换成变换域; 以及在变换的媒体信号的至少一些部分中隐藏多位数据。 该映射标识了应该避免或抑制多位数据隐藏的媒体信号中的至少一个区域。 至少一种转换行为或隐藏行为利用媒体信号的映射。 还提供了其他实施例。

公开(公告)号：US20070147653A1

公开(公告)日：2007-06-28

申请号：US11427265

申请日：2006-06-28

申请人： Alastair Reed ,  Brett Hannigan

发明人： Alastair Reed ,  Brett Hannigan

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T1/0042 ,  G06T2201/0051 ,  G06T2201/0065

摘要： The present invention relates to digital watermarking. In one implementation, a system is provided to read a digital watermark from digital imagery which includes data representing a number of pixels. Each pixel of the number of pixels is defined by a set of values representing color components of the particular pixel. The digital watermark is embedded in the digital imagery through modifications to at least some data representing the digital imagery. The system includes a filter to calculate values of pixels along a preferred projection axis, the preferred projection axis corresponds to a direction of embedding determined based on color characteristics of at least some pixels associated with the digital imagery; and a digital watermark reader which operates on values calculated by the filter. Other implementations are provided as well.

摘要翻译： 本发明涉及数字水印技术。 在一个实现中，提供了一种系统，用于从数字图像读取数字水印，数字图像包括表示多个像素的数据。 像素数的每个像素由表示特定像素的颜色分量的一组值定义。 通过对代表数字图像的至少一些数据进行修改，将数字水印嵌入到数字图像中。 该系统包括用于计算沿着优选投影轴的像素值的滤光器，优选投影轴对应于基于与数字图像相关联的至少一些像素的颜色特性确定的嵌入方向; 以及对由滤波器计算的值进行操作的数字水印读取器。 还提供其他实现。

公开(公告)号：US20060115108A1

公开(公告)日：2006-06-01

申请号：US11152685

申请日：2005-06-13

申请人： Tony Rodriguez ,  Sean Calhoon ,  Alastair Reed

发明人： Tony Rodriguez ,  Sean Calhoon ,  Alastair Reed

IPC分类号： G06K9/00 ,  G06F17/30

CPC分类号： G06F17/30265 ,  G06F17/3028 ,  G06T1/0021 ,  H04N1/32149 ,  H04N1/32352

摘要： The present invention provides methods and systems to improve network searching for watermarked content. In some implementations we employ keyword searching to narrow the universe of possible URL candidates. A resulting URL list is searched for digital watermarking. A system is provided to allow customer input. For example, a customer enters keywords or network locations. The keywords or network locations are provided to a watermark-enabled web browser which accesses locations associated with the keywords or network locations. Some implementations of the present invention employ a plurality of distributed watermark-enabled web browsers. Other aspects of the invention provide methods and system to facilitate desktop searching and automated metadata gathering and generating. In one implementation a digital watermark is used to determine whether metadata associated with an image or audio file is current or fresh. The metadata is updated when it is out of date. Watermarks can also be used to link to or facilitate so-called on-line “blogs” (or online conversations).

摘要翻译： 本发明提供了改进水印内容的网络搜索的方法和系统。 在一些实现中，我们使用关键词搜索来缩小可能的URL候选者的范围。 搜索得到的URL列表以获得数字水印。 提供了一个允许客户输入的系统。 例如，客户输入关键字或网络位置。 关键字或网络位置被提供给访问与关键字或网络位置相关联的位置的启用水印的网络浏览器。 本发明的一些实施方案采用多个分布式水印启用的网络浏览器。 本发明的其他方面提供了方便和系统以便于桌面搜索和自动元数据收集和生成。 在一个实现中，使用数字水印来确定与图像或音频文件相关联的元数据是当前还是新鲜。 元数据在过期时更新。 水印也可用于链接或促进所谓的在线“博客”（或在线对话）。

公开(公告)号：US20050041835A1

公开(公告)日：2005-02-24

申请号：US10836094

申请日：2004-04-29

申请人： Alastair Reed ,  Tony Rodriguez ,  Ravi Sharma

发明人： Alastair Reed ,  Tony Rodriguez ,  Ravi Sharma

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

CPC分类号： G06T1/0042 ,  H04N1/00002 ,  H04N1/00005 ,  H04N1/00037

摘要： This disclosure describes methods for using embedded auxiliary signals in documents for copy detection. In one implementation we embed an auxiliary signal with a first color that is out of gamut with process color inks or with a particular range of printers. A process color approximation of the first color yields a relatively different contrast when, e.g., viewed with an interference filter. A copy is determined based on the relative presence or absence of the auxiliary signal. In another implementation, we provide a first auxiliary signal with a first color and a second auxiliary signal with a second color. A filter is matched according to the spectral response of the first color. The second color preferably includes a spectral response that is inversely related to the matched filter. The first signal is then detectable in a process color copy, but less so in the original. However, the second signal is detectable in the original, but less so in the copy. In still other implementations we compare relative contrast of a signal to determine an original from a copy.

摘要翻译： 本公开描述了在用于复制检测的文档中使用嵌入式辅助信号的方法。 在一个实现中，我们使用具有处理颜色墨水或特定范围的打印机的第一种颜色嵌入不同色域的辅助信号。 当例如用干涉滤光片观察时，第一种颜色的处理颜色近似产生相对不同的对比度。 基于辅助信号的相对存在或不存在来确定副本。 在另一实现中，我们提供具有第一颜色的第一辅助信号和具有第二颜色的第二辅助信号。 滤光片根据第一种颜色的光谱响应进行匹配。 第二种颜色优选地包括与匹配滤波器相反的光谱响应。 然后第一个信号可以在过程颜色拷贝中检测到，但在原始信号中不太可能。 然而，第二个信号在原件中是可检测的，但在副本中较少。 在其他实施方式中，我们比较信号的相对对比度以从副本确定原件。

公开(公告)号：US20060008112A1

公开(公告)日：2006-01-12

申请号：US11153901

申请日：2005-06-14

申请人： Alastair Reed ,  Trent Brundage

发明人： Alastair Reed ,  Trent Brundage

IPC分类号： G06K9/00

CPC分类号： G06T1/0042 ,  G06T1/0028 ,  G06T1/0085 ,  G06T2201/0051 ,  H04N1/32144 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32251 ,  H04N1/32288 ,  H04N1/32293 ,  H04N1/32309 ,  H04N2201/327

摘要： The present invention relates to digital watermarking. In a preferred embodiment, media is embedded with one or more digital watermark components. The media includes a blue color plane, a red color plane and a green color plane. The digital watermark component is embedded in the blue color plane, and scaled versions of the digital watermark component are embedded in the red and green color planes. The scaling of component in the red and green color planes helps insure that luminance attributable to the blue color digital watermark component is reduced or offset. A related watermark detection scheme is disclosed.

摘要翻译： 本发明涉及数字水印技术。 在优选实施例中，介质被嵌入一个或多个数字水印分量。 介质包括蓝色平面，红色平面和绿色平面。 数字水印分量嵌入蓝色平面，数字水印分量的缩放版本嵌入红，绿色平面。 红色和绿色色彩分量的缩放有助于确保归因于蓝色数字水印分量的亮度减小或抵消。 公开了一种相关的水印检测方案。