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    • 2. 发明授权
    • Arrangements for increasing detection confidence
    • 增加检测信心的安排
    • US09008192B2
    • 2015-04-14
    • US13309960
    • 2011-12-02
    • Geoffrey B. RhoadsJohn Stach
    • Geoffrey B. RhoadsJohn Stach
    • H04N7/64G06K9/68H04N7/22
    • G06T1/0021G06K9/685G06K2009/6871G06T2201/0065G10L19/018
    • In one embodiment, a first set of digital data (e.g., an image) is tested for the presence of a certain feature (e.g., a certain face), yielding one of two outcomes (e.g., not-present, or present). If the testing yields the first outcome, no additional testing is performed. If, however, the testing yields the second outcome, further testing is performed to further check this outcome. Such further testing is performed on a second set of digital data that is based on, but different from, the first set of data. Only if the original testing and the further testing both yield the same second outcome is it treated as a valid result. A variety of other features and arrangements are also detailed.
    • 在一个实施例中,测试第一组数字数据(例如,图像)以存在某个特征(例如,某个面部),产生两个结果之一(例如,不存在或存在)。 如果测试产生了第一个结果,则不进行其他测试。 然而,如果测试产生了第二个结果,则进行进一步测试以进一步检查该结果。 对第二组数字数据执行这样的进一步测试,该第二组数字数据基于但不同于第一组数据。 只有当原始测试和进一步测试都产生相同的第二个结果时,才被视为有效的结果。 还详细介绍了各种其他功能和安排。
    • 3. 发明授权
    • Encoding and decoding auxiliary signals
    • 辅助信号编码和解码
    • US08170273B2
    • 2012-05-01
    • US12768519
    • 2010-04-27
    • Ravi K. SharmaJohn Stach
    • Ravi K. SharmaJohn Stach
    • G06K9/00H04B1/66
    • G06T1/0064G06T2201/0052
    • 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.
    • 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。
    • 4. 发明授权
    • Digital watermarking methods, programs and apparatus
    • 数字水印方法,程序和设备
    • US08068636B2
    • 2011-11-29
    • US12562883
    • 2009-09-18
    • Tony F. RodriguezJohn Stach
    • Tony F. RodriguezJohn Stach
    • G06K9/00
    • G06T1/0028G06T1/0064
    • The present claims recite various steganographic and digital watermarking methods and apparatus. One claim recites a method of watermarking a representation of a physical object. The method includes: projecting a watermark orientation component onto a physical object; and using a camera or image sensor, capturing an image or video of the physical object including the watermark orientation component as projected thereon. Another claim recites an apparatus including: a light source for projecting a registration component onto a physical object; a camera or sensor for capturing an image or video of the physical object including the registration component as projected thereon; and an electronic processor programmed for encoding a message in the image or video captured by said camera or sensor. Of course, other claims and combinations are provided as well.
    • 本权利要求描述了各种隐写和数字水印方法和装置。 一个要求描述了对物理对象的表示进行水印的方法。 该方法包括:将水印定向分量投影到物理对象上; 以及使用照相机或图像传感器,捕获包括投影在其上的水印定向分量的物理对象的图像或视频。 另一个权利要求描述了一种装置,包括:用于将登记部件投射到物理对象上的光源; 照相机或传感器,用于捕获包括在其上投射的登记部件的物理对象的图像或视频; 以及被编程用于对由所述相机或传感器捕获的图像或视频中的消息进行编码的电子处理器。 当然,也提供其他权利要求和组合。
    • 5. 发明申请
    • Quantization-Based Data Embedding in Mapped Data
    • 基于量化的数据嵌入映射数据
    • US20110044494A1
    • 2011-02-24
    • US12849726
    • 2010-08-03
    • Brett Alan BradleyJohn Stach
    • Brett Alan BradleyJohn Stach
    • H04K1/00
    • G10L19/032G06T1/0064G06T2201/0061G06T2201/0601G10L19/018H04N1/32187H04N1/32197H04N1/3232
    • Novel methods and systems for quantization based data embedding and reading in host signals, such as image, audio and video signals. To embed auxiliary data in a host signal, an embedder maps the host signal from a first domain into a mapped signal in a second domain. The embedder performs quantization based embedding of auxiliary data into the host signal using quantizers. The quantizers are adapted such that the relationship between corresponding quantizers in the first and second domains satisfies a predetermined constraint. The mapping improves the robustness of the data embedding method by increasing the chances that the embedded data can be recovered by an auxiliary data reader after modifications. A related embedding method projects the mapped signal unto a vector, and specifically, a pseudorandom vector. It performs quantization based embedding on the projected signal. The use of this projection provides added robustness of the embedded data to noise and other forms of distortion.
    • 用于基于量化的数据嵌入和读取在主机信号中的新方法和系统,例如图像,音频和视频信号。 为了将辅助数据嵌入主机信号中,嵌入器将来自第一域的主机信号映射到第二域中的映射信号。 嵌入器使用量化器对辅助数据进行基于量化的嵌入主机信号。 调整量化器,使得第一和第二域中相应的量化器之间的关系满足预定的约束。 该映射通过增加在修改之后辅助数据读取器可以恢复嵌入数据的机会来改善数据嵌入方法的鲁棒性。 相关的嵌入方法将映射的信号投影到向量,具体地说,是伪随机向量。 它对投影信号执行基于量化的嵌入。 使用这种投影可以增加嵌入数据对噪声和其他形式的失真的鲁棒性。
    • 7. 发明申请
    • Encoding and Decoding Auxiliary Signals
    • 编码和解码辅助信号
    • US20090232350A1
    • 2009-09-17
    • US12368104
    • 2009-02-09
    • Ravi K. SharmaJohn Stach
    • Ravi K. SharmaJohn Stach
    • G06K9/00
    • G06T1/0064G06T2201/0052
    • 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.
    • 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。
    • 8. 发明授权
    • Progressive image quality control using watermarking
    • 使用水印的逐行图像质量控制
    • US07515730B2
    • 2009-04-07
    • US10319413
    • 2002-12-13
    • Jun TianJohn Stach
    • Jun TianJohn Stach
    • G06K9/00H04L9/00G06K15/00
    • H04N1/32299H04N1/32144H04N1/32304H04N1/3232H04N1/32347
    • The ability to remove a watermark from an encoded image by reversible watermarking opens the possibility of various novel applications. Several such applications are detailed. One permits different classes of consumers to gain access to different versions of an image. A pristine image is intentionally degraded in some fashion, and distributed to consumers. By reference to one or more watermarks in the degraded image, some or all of the degradation can be removed, or transformed to a less-objectionable state. Through such arrangements, image consumers with different needs can gain access to versions of the image having differing qualities.
    • 通过可逆水印从编码图像中去除水印的能力打开了各种新颖应用的可能性。 几个这样的应用程序是详细的。 允许不同类别的消费者访问不同版本的图像。 原始图像有意地以某种方式退化,并分发给消费者。 通过参考退化图像中的一个或多个水印,可以去除部分或全部退化,或者转化为较不令人讨厌的状态。 通过这种安排,具有不同需求的图像消费者可以访问具有不同质量的图像的版本。
    • 9. 发明申请
    • Data hiding through arrangement of objects
    • 数据隐藏通过对象的排列
    • US20050207615A1
    • 2005-09-22
    • US11127442
    • 2005-05-11
    • John Stach
    • John Stach
    • G06K9/00H04N1/32
    • H04N1/32149G06T1/0064G06T2201/0051H04N1/32154H04N1/32187H04N1/32208H04N1/32229H04N1/32251H04N1/32309H04N2201/327
    • The present invention provides steganographic embedding techniques. A digital watermark signal is reduced to a set of spatial positions. The set of spatial positions sufficiently conveys the digital watermark signal. Message objects are positioned according to the set of spatial positions. Non-message objects are combined with the message objects to form an image or design. The message objects include distinguishable characteristics, e.g., via color, contrast, gray-scale level or luminance, in comparison to the non-message objects. The digital watermark signal is detected by distinguishing the message objects from the non-message objects (e.g., via color or contrast differences) and analyzing the relative placement of the message objects within the image or design.
    • 本发明提供隐写嵌入技术。 数字水印信号被减少到一组空间位置。 该组空间位置充分地传达了数字水印信号。 消息对象根据空间位置的集合进行定位。 非消息对象与消息对象组合以形成图像或设计。 与非消息对象相比,消息对象包括例如经由颜色,对比度,灰度级或亮度的可区分的特征。 通过将消息对象与非消息对象(例如,经由颜色或对比度差异)区分开来并且分析消息对象在图像或设计内的相对位置来检测数字水印信号。