公开(公告)号：US08891811B2

公开(公告)日：2014-11-18

申请号：US11228033

申请日：2005-09-14

申请人： Osama M. Alattar ,  Adnan M. Alattar

发明人： Osama M. Alattar ,  Adnan M. Alattar

IPC分类号： G06K9/00

CPC分类号： G06T1/005 ,  G06K9/00744 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0065 ,  H04N1/32203 ,  H04N1/32267 ,  H04N1/32288 ,  H04N1/32352

摘要： The present invention relates generally to digital watermarking. In one implementation, we provide a hierarchical digital watermark detector method. The method includes: i) in a first layer of a hierarchical search, performing watermark detection on blocks of at least a portion of an incoming suspect signal; ii) identifying a first block in the portion that is likely to include a decodable digital watermark; and iii) in a second layer of the hierarchical search, performing additional watermark detection on overlapping blocks in a neighborhood around the first block. Another implementation provides a hierarchical watermark detector including a buffer and a detector. The buffer stores portions of an incoming signal. The detector evaluates watermark detection criteria for blocks stored in the buffer, and hierarchically zooms into a neighborhood of blocks around a block associated with watermark detection criteria that satisfies detection criteria.

摘要翻译： 本发明一般涉及数字水印。 在一个实现中，我们提供了一种分层数字水印检测器方法。 该方法包括：i）在分层搜索的第一层中，对进入的可疑信号的至少一部分的块执行水印检测; ii）识别该部分中可能包括可解码数字水印的第一块; 以及iii）在所述分层搜索的第二层中，对所述第一块周围的邻域中的重叠块执行附加水印检测。 另一实施方案提供了包括缓冲器和检测器的分层水印检测器。 缓冲器存储进入信号的部分。 检测器评估存储在缓冲器中的块的水印检测标准，并且分级地放大到与满足检测标准的水印检测标准相关联的块周围的块的邻域。

公开(公告)号：US08014557B2

公开(公告)日：2011-09-06

申请号：US10871349

申请日：2004-06-17

申请人： Adnan M. Alattar ,  Osama M. Alattar

发明人： Adnan M. Alattar ,  Osama M. Alattar

IPC分类号： G06K9/00

CPC分类号： G06F17/2294 ,  G06F17/241 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0062 ,  G06T2201/0065 ,  H04N1/32203 ,  H04N1/32219 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/328 ,  H04N2201/3284

摘要： A text watermarking method embeds an auxiliary message in an original electronic text document to form a watermarked text document. The method applies a spreading function to message symbols to spread the symbols over a carrier, which forms a modulated carrier. It maps elements of the modulated carrier to corresponding inter-word spaces in the electronic text document, and applies an embedding function to modify the corresponding inter-word spaces according to elements of the modulated carrier signal such that the modified inter-word spaces hide the modulated carrier signal in the watermarked text document. The message symbols are automatically decodable from the watermarked document without the original electronic text document. A compatible decoder extracts the auxiliary message from a printed or electronic watermarked text document. The decoder automatically measures inter-word spaces in the watermarked text document. It estimates elements of a modulated carrier signal embedded in the inter-word spaces to form an estimated modulated carrier signal, and applies a de-spreading function to the estimated modulated carrier signal to extract message symbols.

摘要翻译： 文本水印方法在原始电子文本文档中嵌入辅助消息以形成水印文本文档。 该方法将扩展函数应用于消息符号，以便在形成调制载波的载波上扩展符号。 它将调制载波的元素映射到电子文本文档中的对应的字间空间，并且根据调制的载波信号的元素应用嵌入功能来修改对应的字间空间，使得修改的字间空间隐藏 在水印文本文档中调制载波信号。 消息符号可以从没有原始电子文本文档的水印文档中自动解码。 兼容解码器从打印或电子水印的文本文档中提取辅助消息。 解码器自动测量水印文本文档中的字间空格。 它估计嵌入在字间空间中的调制载波信号的元素以形成估计的调制载波信号，并且对估计的调制载波信号应用去扩展功能以提取消息符号。

公开(公告)号：US20120030546A1

公开(公告)日：2012-02-02

申请号：US13181072

申请日：2011-07-12

申请人： Adnan M. Alattar ,  Osama M. Alattar

发明人： Adnan M. Alattar ,  Osama M. Alattar

IPC分类号： H03M13/05 ,  G06F11/10 ,  H03M13/15

CPC分类号： G06F17/2294 ,  G06F17/241 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0062 ,  G06T2201/0065 ,  H04N1/32203 ,  H04N1/32219 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/328 ,  H04N2201/3284

摘要： A text watermarking method embeds an auxiliary message in an original electronic text document to form a watermarked text document. The method applies a spreading function to message symbols to spread the symbols over a carrier, which forms a modulated carrier. It maps elements of the modulated carrier to corresponding inter-word spaces in the electronic text document, and applies an embedding function to modify the corresponding inter-word spaces according to elements of the modulated carrier signal such that the modified inter-word spaces hide the modulated carrier signal in the watermarked text document. The message symbols are automatically decodable from the watermarked document without the original electronic text document. A compatible decoder extracts the auxiliary message from a printed or electronic watermarked text document. The decoder automatically measures inter-word spaces in the watermarked text document. It estimates elements of a modulated carrier signal embedded in the inter-word spaces to form an estimated modulated carrier signal, and applies a de-spreading function to the estimated modulated carrier signal to extract message symbols.

摘要翻译： 文本水印方法在原始电子文本文档中嵌入辅助消息以形成水印文本文档。 该方法将扩展函数应用于消息符号，以便在形成调制载波的载波上扩展符号。 它将调制载波的元素映射到电子文本文档中的对应的字间空间，并且根据调制的载波信号的元素应用嵌入功能来修改对应的字间空间，使得修改的字间空间隐藏 在水印文本文档中调制载波信号。 消息符号可以从没有原始电子文本文档的水印文档中自动解码。 兼容解码器从打印或电子水印的文本文档中提取辅助消息。 解码器自动测量水印文本文档中的字间空格。 它估计嵌入在字间空间中的调制载波信号的元素以形成估计的调制载波信号，并且对估计的调制载波信号应用去扩展功能以提取消息符号。

公开(公告)号：US08320611B2

公开(公告)日：2012-11-27

申请号：US13181072

申请日：2011-07-12

申请人： Adnan M. Alattar ,  Osama M. Alattar

发明人： Adnan M. Alattar ,  Osama M. Alattar

IPC分类号： G06K9/00

CPC分类号： G06F17/2294 ,  G06F17/241 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0062 ,  G06T2201/0065 ,  H04N1/32203 ,  H04N1/32219 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/328 ,  H04N2201/3284

摘要： A text watermarking method embeds an auxiliary message in an original electronic text document to form a watermarked text document. The method applies a spreading function to message symbols to spread the symbols over a carrier, which forms a modulated carrier. It maps elements of the modulated carrier to corresponding inter-word spaces in the electronic text document, and applies an embedding function to modify the corresponding inter-word spaces according to elements of the modulated carrier signal such that the modified inter-word spaces hide the modulated carrier signal in the watermarked text document. The message symbols are automatically decodable from the watermarked document without the original electronic text document. A compatible decoder extracts the auxiliary message from a printed or electronic watermarked text document. The decoder automatically measures inter-word spaces in the watermarked text document. It estimates elements of a modulated carrier signal embedded in the inter-word spaces to form an estimated modulated carrier signal, and applies a de-spreading function to the estimated modulated carrier signal to extract message symbols.

摘要翻译： 文本水印方法在原始电子文本文档中嵌入辅助消息以形成水印文本文档。 该方法将扩展函数应用于消息符号，以便在形成调制载波的载波上扩展符号。 它将调制载波的元素映射到电子文本文档中的对应的字间空间，并且根据调制的载波信号的元素应用嵌入功能来修改对应的字间空间，使得修改的字间空间隐藏 在水印文本文档中调制载波信号。 消息符号可以从没有原始电子文本文档的水印文档中自动解码。 兼容解码器从打印或电子水印的文本文档中提取辅助消息。 解码器自动测量水印文本文档中的字间空格。 它估计嵌入在字间空间中的调制载波信号的元素以形成估计的调制载波信号，并且对估计的调制载波信号应用去扩展功能以提取消息符号。

公开(公告)号：US06993149B2

公开(公告)日：2006-01-31

申请号：US09963344

申请日：2001-09-25

申请人： Hugh L. Brunk ,  Osama M. Alattar

发明人： Hugh L. Brunk ,  Osama M. Alattar

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06K15/02 ,  G06T2201/0051 ,  H04N1/32208 ,  H04N1/32309

摘要： The present invention relates to digitally watermarking spot color images. In one embodiment, an original spot color is replaced with a combination of cyan (C), magenta (M) and yellow (Y) components and the original spot color. The CMY components convey a digital watermark. Preferably, a large percentage halftone process screens the spot color. This screened spot color is combined with the CMY components. Combining the CMY components with a large percentage halftone screening results in a watermarked image color that closely approximates to the original spot color. In another embodiment, a spot color is halftone-screened to a percentage of its original intensity. The screened-back spot color is modulated to accommodate a watermark signal.

公开(公告)号：US08144368B2

公开(公告)日：2012-03-27

申请号：US10723181

申请日：2003-11-26

申请人： Tony F. Rodriguez ,  Alastair M. Reed ,  Ravi K. Sharma ,  Osama M. Alattar ,  Brett T. Hannigan ,  Kenneth L. Levy ,  Hugh L. Brunk ,  Geoffrey B. Rhoads ,  Ammon E. Gustafson

发明人： Tony F. Rodriguez ,  Alastair M. Reed ,  Ravi K. Sharma ,  Osama M. Alattar ,  Brett T. Hannigan ,  Kenneth L. Levy ,  Hugh L. Brunk ,  Geoffrey B. Rhoads ,  Ammon E. Gustafson

IPC分类号： H04N1/40 ,  G06K9/00

CPC分类号： H04N1/32149 ,  B29C45/1418 ,  B42D25/29 ,  G06T1/0021 ,  G06T7/0002 ,  G06T2201/0064 ,  G06T2207/30144 ,  G07D7/0034 ,  G07D7/004 ,  H04N1/00002 ,  H04N1/00005 ,  H04N1/00037 ,  H04N1/00092 ,  H04N1/32208 ,  H04N1/32219 ,  H04N1/32261 ,  H04N1/32304 ,  H04N1/32309 ,  H04N2201/3205 ,  H04N2201/3207 ,  H04N2201/3226 ,  H04N2201/3233 ,  H04N2201/3239 ,  H04N2201/327 ,  H04N2201/3271

摘要： This disclosure describes methods for using embedded auxiliary signals in documents for copy detection and other applications. In on application, the auxiliary signal is formed as an array of elements selected from a set of print structures with properties that change differently in response to copy operations. These changes in properties of the print structures that carry the embedded auxiliary signal are automatically detectable. For example, the changes make the embedded auxiliary signal more or less detectable. The extent to which the auxiliary data is detected forms a detection metric used in combination with one or more other metrics to differentiate copies from originals. Examples of sets of properties of the print structures that change differently in response to copy operations include sets of colors (including different types of inks), sets of screens or dot structures that have varying dot gain, sets of structures with different aliasing effects, etc. Robust and fragile watermarks are used in Image Replacement Documents for a variety of applications. Digital watermarks act as on-board mediators in authentication of a variety of printed documents. Finally, digital watermarks are used to help manage quality of the scanners used in imaging systems.

摘要翻译： 本公开描述了在用于复制检测和其他应用的文档中使用嵌入式辅助信号的方法。 在应用中，辅助信号被形成为从一组打印结构中选择的元素的阵列，其具有响应于复制操作而改变的属性。 携带嵌入式辅助信号的打印结构的这些属性变化可以自动检测。 例如，这些改变使得嵌入式辅助信号或多或少被检测出来。 检测辅助数据的程度形成与一个或多个其他度量结合使用的检测度量，以区分副本与原件。 对于复制操作而改变不同的打印结构的属性集合的示例包括具有不同的点增益的颜色（包括不同类型的墨水），屏幕或点结构的集合，具有不同混叠效果的结构集合等 图像替换文档中使用了强大而脆弱的水印，用于各种应用。 数字水印作为各种印刷文件认证中的板载介质。 最后，数字水印用于帮助管理成像系统中使用的扫描仪的质量。

公开(公告)号：US06975744B2

公开(公告)日：2005-12-13

申请号：US10032282

申请日：2001-12-20

申请人： Ravi K. Sharma ,  Osama M. Alattar

发明人： Ravi K. Sharma ,  Osama M. Alattar

IPC分类号： G06T1/00 ,  H04K1/00

CPC分类号： G06T1/0071 ,  G06T2201/0052 ,  G06T2201/0065 ,  G06T2201/0601

摘要： Steganographic calibration signals (sometimes termed “orientation signals,” “marker signals,” reference signals,” “grid signals,” etc.) are sometimes included with digital watermarking signals so that subsequent distortion of the object thereby marked (e.g., a digital image file, audio clip, document, etc.) can later be discerned and compensated-for. Digital watermark detection systems sometimes fail if the object encompasses several separately-watermarked components (e.g., a scanned magazine page with several different images, or photocopy data resulting from scanning while several documents are on the photocopier platen). Each component may include its own calibration signal, confusing the detection system. In accordance with certain embodiments, this problem is addressed by a proximity-based approach, and/or a multiple grid-based approach. In accordance with other embodiments, the calibration signal can—itself—convey watermark information, so it serves both a calibration and a payload-conveyance function.

摘要翻译： 隐写校准信号（有时称为“取向信号”，“标记信号”，“参考信号”，“电网信号”等）有时包含在数字水印信号中，从而使得由此标记的物体的后续失真（例如数字图像 文件，音频剪辑，文档等）可以稍后被识别和补偿。如果对象包含几个单独加水印的组件（例如，具有几个不同图像的扫描的杂志页面或者影像复制数据），则数字水印检测系统有时会失败 根据某些实施例，该问题通过基于邻近的方法和/或多个网格方法来解决，其中，所述检测系统包括： 根据其他实施例，校准信号本身可以传达水印信息，因此它既可用于校准和付费 广告传送功能。

公开(公告)号：US06763124B2

公开(公告)日：2004-07-13

申请号：US10074677

申请日：2002-02-11

申请人： Osama M. Alattar ,  Alastair M. Reed ,  Trent J. Brundage

发明人： Osama M. Alattar ,  Alastair M. Reed ,  Trent J. Brundage

IPC分类号： G06K900

CPC分类号： H04N1/32208 ,  G06Q40/04 ,  G06T1/0028 ,  G08G1/017 ,  H04N1/32229 ,  H04N1/32251 ,  H04N1/32293 ,  H04N1/32309 ,  H04N21/23892 ,  H04N2201/327

摘要： The present invention relates to digitally watermarking spot colors. Spot colors are represented as digital files including a set of intensity values. These intensity values correspond to the amount or percentage of spot color ink that should be applied to a pixel, a group of pixel or to an image area. A watermark signal component including luminance value adjustments is converted to intensity value adjustments. These intensity value adjustments are applied to the spot color digital file to facilitated digital watermark embedding. In another embodiment, an adjustment is made to the intensity values to compensate for noise introduced by a scanner, camera or color conversion.

摘要翻译： 本发明涉及数字水印专色。 专色表示为数字文件，包括一组强度值。 这些强度值对应于应用于像素，一组像素或图像区域的专色墨水的量或百分比。 包括亮度值调整的水印信号分量被转换为强度值调整。 这些强度值调整被应用于专色数字文件以促进数字水印嵌入。 在另一个实施例中，对强度值进行调整以补偿由扫描仪，相机或颜色转换引入的噪声。