公开(公告)号：US20100322468A1

公开(公告)日：2010-12-23

申请号：US12768519

申请日：2010-04-27

申请人： Ravi K. Sharma ,  John Stach

发明人： Ravi K. Sharma ,  John Stach

IPC分类号： G06K9/00

CPC分类号： G06T1/0064 ,  G06T2201/0052

摘要： This disclosure describes apparatus and systems for encoding and decoding signals from a host signal such as audio, video or imagery. One claim recites an apparatus comprising: electronic memory for storing a media signal representing audio or video; and an electronic processor. The electronic processor is programmed for: extracting data representing at least some features of the media signal; using the extracted data as a key to select coefficients in a transform domain, the coefficients representing the media signal; and modifying selected coefficients to hide a steganographic signal in the media signal. Of course, other claims and combinations are provided as well.

摘要翻译： 本公开描述了用于对来自主机信号（例如音频，视频或图像）的信号进行编码和解码的装置和系统。 一个权利要求记载一种装置，包括：用于存储表示音频或视频的媒体信号的电子存储器; 和电子处理器。 电子处理器被编程为：提取表示媒体信号的至少一些特征的数据; 使用提取的数据作为键来选择变换域中的系数，表示媒体信号的系数; 以及修改所选择的系数以隐藏媒体信号中的隐写信号。 当然，也提供其他权利要求和组合。

公开(公告)号：US07706570B2

公开(公告)日：2010-04-27

申请号：US12368104

申请日：2009-02-09

申请人： Ravi K. Sharma ,  John Stach

发明人： Ravi K. Sharma ,  John Stach

IPC分类号： G06K9/00 ,  H04B1/66

CPC分类号： G06T1/0064 ,  G06T2201/0052

摘要： This disclosure describes methods and systems for encoding and decoding signals from a host signal such as audio, video or imagery. One claim recites a method comprising: receiving a host signal carrying an auxiliary signal; extracting data representing at least some features of the host signal, said extracting utilizes one or more processors; using the data representing at least some features of the host signal to determine a key; and detecting the auxiliary signal in a transform domain associated with the key, the detecting utilizes one or more processors. Other claims and combinations are provided as well.

摘要翻译： 本公开描述了用于对来自诸如音频，视频或图像的主机信号的信号进行编码和解码的方法和系统。 一个权利要求描述了一种方法，包括：接收携带辅助信号的主机信号; 提取表示主机信号的至少一些特征的数据，所述提取利用一个或多个处理器; 使用表示主机信号的至少一些特征的数据来确定密钥; 并且在与所述密钥相关联的变换域中检测辅助信号，所述检测利用一个或多个处理器。 还提供了其他权利要求和组合。

公开(公告)号：US07702125B2

公开(公告)日：2010-04-20

申请号：US10774312

申请日：2004-02-05

申请人： Kenneth L. Levy ,  Ravi K. Sharma ,  Lance Lixin Shen ,  John Stach

发明人： Kenneth L. Levy ,  Ravi K. Sharma ,  Lance Lixin Shen ,  John Stach

IPC分类号： G06K9/00

CPC分类号： G06T1/0064

摘要： Various improvements and applications for digital watermarking technology are detailed. One concerns techniques for making watermarks resistant to malicious attacks. Another involves using digital watermarking with ID cards and credentials, such as a watermarked driver's license conveying a user's cryptographic PKI. Still another uses digital watermarks in connection with automated compliance audits for corporate users of electronic content. A variety of other technologies are also detailed.

摘要翻译： 详细介绍了数字水印技术的各种改进和应用。 一个涉及使水印抵御恶意攻击的技术。 另一个涉及使用ID卡和凭证的数字水印，例如传达用户密码PKI的带有水印的驾驶执照。 还有另一个使用电子水印与电子内容的企业用户的自动化合规性审核相关联。 还详细介绍了各种其他技术。

公开(公告)号：US08170273B2

公开(公告)日：2012-05-01

申请号：US12768519

申请日：2010-04-27

申请人： Ravi K. Sharma ,  John Stach

发明人： Ravi K. Sharma ,  John Stach

IPC分类号： G06K9/00 ,  H04B1/66

CPC分类号： G06T1/0064 ,  G06T2201/0052

摘要： This disclosure describes apparatus and systems for encoding and decoding signals from a host signal such as audio, video or imagery. One claim recites an apparatus comprising: electronic memory for storing a media signal representing audio or video; and an electronic processor. The electronic processor is programmed for: extracting data representing at least some features of the media signal; using the extracted data as a key to select coefficients in a transform domain, the coefficients representing the media signal; and modifying selected coefficients to hide a steganographic signal in the media signal. Of course, other claims and combinations are provided as well.

摘要翻译： 本公开描述了用于对来自主机信号（例如音频，视频或图像）的信号进行编码和解码的装置和系统。 一个权利要求记载一种装置，包括：用于存储表示音频或视频的媒体信号的电子存储器; 和电子处理器。 电子处理器被编程为：提取表示媒体信号的至少一些特征的数据; 使用提取的数据作为键来选择变换域中的系数，表示媒体信号的系数; 以及修改所选择的系数以隐藏媒体信号中的隐写信号。 当然，也提供其他权利要求和组合。

公开(公告)号：US20090285446A1

公开(公告)日：2009-11-19

申请号：US12273423

申请日：2008-11-18

申请人： John Stach ,  Hugh L. Brunk ,  Ravi K. Sharma

发明人： John Stach ,  Hugh L. Brunk ,  Ravi K. Sharma

IPC分类号： G06K9/00 ,  G06K9/36

CPC分类号： G10L21/00 ,  G06T1/0064 ,  G06T2201/0052 ,  G10L19/018 ,  H04N1/32144 ,  H04N1/32154 ,  H04N1/32352

摘要： Machine readable signals embedded in other media signals include a circular structure in a transform domain to facilitate detection. The machine readable signals are not apparent to human observers of rendered media containing the machine readable signals, such as images and documents. A detector captures the media signal, transforms it to the transform domain, and then uses the circular structure in the transform domain to facilitate detection despite rotation of the media signal.

摘要翻译： 嵌入在其他媒体信号中的机读信号包括变换域中的圆形结构以便于检测。 机器可读信号对于包含机器可读信号（例如图像和文档）的渲染介质的人类观察者来说是不明显的。 检测器捕获媒体信号，将其转换为变换域，然后在变换域中使用圆形结构，以便尽管媒体信号旋转，以便于检测。

公开(公告)号：US20090232350A1

公开(公告)日：2009-09-17

申请号：US12368104

申请日：2009-02-09

申请人： Ravi K. Sharma ,  John Stach

发明人： Ravi K. Sharma ,  John Stach

IPC分类号： G06K9/00

CPC分类号： G06T1/0064 ,  G06T2201/0052

摘要： This disclosure describes methods and systems for encoding and decoding signals from a host signal such as audio, video or imagery. One claim recites a method comprising: receiving a host signal carrying an auxiliary signal; extracting data representing at least some features of the host signal, said extracting utilizes one or more processors; using the data representing at least some features of the host signal to determine a key; and detecting the auxiliary signal in a transform domain associated with the key, the detecting utilizes one or more processors. Other claims and combinations are provided as well.

摘要翻译： 本公开描述了用于对来自诸如音频，视频或图像的主机信号的信号进行编码和解码的方法和系统。 一个权利要求描述了一种方法，包括：接收携带辅助信号的主机信号; 提取表示主机信号的至少一些特征的数据，所述提取利用一个或多个处理器; 使用表示主机信号的至少一些特征的数据来确定密钥; 并且在与所述密钥相关联的变换域中检测辅助信号，所述检测利用一个或多个处理器。 还提供了其他权利要求和组合。

公开(公告)号：US08005259B2

公开(公告)日：2011-08-23

申请号：US12763417

申请日：2010-04-20

申请人： Kenneth L. Levy ,  Ravi K. Sharma ,  Lance Lixin Shen ,  John Stach

发明人： Kenneth L. Levy ,  Ravi K. Sharma ,  Lance Lixin Shen ,  John Stach

IPC分类号： G06K9/00

CPC分类号： G06T1/0064

摘要： Various improvements and applications for digital watermarking technology are detailed. One concerns techniques for making watermarks resistant to malicious attacks. Another involves using digital watermarking with ID cards and credentials, such as a watermarked driver's license conveying a user's cryptographic PKI. Still another uses digital watermarks in connection with automated compliance audits for corporate users of electronic content. A variety of other technologies are also detailed.

摘要翻译： 详细介绍了数字水印技术的各种改进和应用。 一个涉及使水印抵御恶意攻击的技术。 另一个涉及使用ID卡和凭证的数字水印，例如传达用户密码PKI的带有水印的驾驶执照。 还有另一个使用电子水印与电子内容的企业用户的自动化合规性审核相关联。 还详细介绍了各种其他技术。

公开(公告)号：US07046819B2

公开(公告)日：2006-05-16

申请号：US10132060

申请日：2002-04-24

申请人： Ravi K. Sharma ,  John Stach

发明人： Ravi K. Sharma ,  John Stach

IPC分类号： G06K9/00

CPC分类号： G06T1/0064 ,  G06T2201/0052

摘要： This disclosure describes a method for encoding a digital watermark into an image signal that is robust to geometric distortion. The digital watermark is adapted to the host image signal in which it is embedded so as to be imperceptible or substantially imperceptible in the watermarked image when displayed or printed. This digital watermark may be used to determine the geometric distortion applied to a watermarked image, may be used to carry auxiliary information, and may be used to detect and decode a digital watermark embedded in a geometrically distorted version of a watermarked image. Because of its robustness to geometric distortion, the digital watermark is useful for a number of applications for embedding auxiliary data in image signals, including still pictures and video, where the image signal is expected to survive geometric distortion.This method may adapted to other types of media signals such as audio.

公开(公告)号：US09398210B2

公开(公告)日：2016-07-19

申请号：US13088259

申请日：2011-04-15

申请人： John Stach ,  Ravi K. Sharma

发明人： John Stach ,  Ravi K. Sharma

IPC分类号： H04N5/232 ,  G06T1/00

CPC分类号： H04N5/23222 ,  G06T1/0021 ,  H04N5/23258 ,  H04N5/23293

摘要： Arrangements are detailed to aid a user in positioning a camera-equipped device (e.g., a smartphone) at a particular viewing position relative to an object being imaged. Other embodiments discern the device's viewing position, and then undertake image or other processing that is dependent on such viewpoint. A great number of other features and arrangements are also detailed.

摘要翻译： 详细的安排是为了帮助用户将相机配备的设备（例如，智能电话机）定位在相对于被成像对象的特定观看位置。 其他实施例分辨设备的观看位置，然后进行取决于这种观点的图像或其他处理。 还详细介绍了许多其他功能和安排。

公开(公告)号：US07489801B2

公开(公告)日：2009-02-10

申请号：US11383742

申请日：2006-05-16

申请人： Ravi K. Sharma ,  John Stach

发明人： Ravi K. Sharma ,  John Stach

IPC分类号： G06K9/36 ,  H04N7/167

CPC分类号： G06T1/0064 ,  G06T2201/0052

摘要： This disclosure describes methods and systems for encoding a digital watermark into and/or detecting a digital watermark from a host (or media) signal such as audio, video or imagery. One implementation involves a method of detecting a digital watermark. The method includes: receiving a host signal carrying a digital watermark; computing attributes of the host signal; using the attributes of the host signal to compute a key; and using the key to detect the digital watermark in a transform domain dependent on the key. Other methods, systems and apparatus are provided as well.

摘要翻译： 本公开描述了用于从诸如音频，视频或图像的主机（或媒体）信号将数字水印编码到和/或检测数字水印的方法和系统。 一种实现涉及一种检测数字水印的方法。 该方法包括：接收携带数字水印的主机信号; 计算主机信号的属性; 使用主机信号的属性来计算密钥; 并使用该密钥来检测取决于密钥的变换域中的数字水印。 还提供了其他方法，系统和装置。