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    Full-color visibility model using CSF which varies spatially with local luminance
    73.
    发明授权
    Full-color visibility model using CSF which varies spatially with local luminance 有权
    使用CSF的全色可见性模型，其在局部亮度上空间变化

    公开(公告)号：US09401001B2

    公开(公告)日：2016-07-26

    申请号：US14588636

    申请日：2015-01-02

    Applicant: Digimarc Corporation

    Inventor： Alastair M. Reed ,  Yang Bai ,  Kristyn R. Falkenstern ,  David Berfanger

    IPC: G06K9/00 ,  G06T1/00 ,  H04N7/167

    CPC classification number: G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0083 ,  G06T2201/0202

    Abstract: The present disclosure relate generally to color science and digital watermarking. A full color visibility model has been developed which has good correlation to subjective visibility tests for color patches degraded with a watermark. A relatively better correlation can be achieved with a model that applies a luminance correction to the contrast sensitivity functions (CSF). The model can be applied during the watermark embed process, using a pyramid based method, to obtain equal visibility. Better robustness and visibility can be obtained with equal visibility embed than uniform strength embed. Of course, other features, combinations and claims are disclosed as well.

    Abstract translation: 本公开一般涉及彩色科学和数字水印。 已经开发了全色可见性模型，其与用水印降级的色斑的主观可见性测试具有良好的相关性。 使用向对比度敏感度函数（CSF）施加亮度校正的模型可以实现相对更好的相关性。 该模型可以在水印嵌入过程中应用，使用基于金字塔的方法，以获得相等的可见性。 可以通过均匀的强度嵌入具有相同的可见性嵌入来获得更好的鲁棒性和可见性。 当然，也公开了其它特征，组合和权利要求。

    Transactional video marking system
    74.
    发明授权
    Transactional video marking system 有权
    事务视频标记系统

    公开(公告)号：US09262793B2

    公开(公告)日：2016-02-16

    申请号：US14214366

    申请日：2014-03-14

    Applicant: Verance Corporation

    Inventor： Jian Zhao ,  Guillaume Mercier

    IPC: G06K9/00 ,  G06T1/00

    CPC classification number: G06T1/0021 ,  G06T1/0028 ,  G06T1/0071 ,  G06T2201/0051 ,  G06T2201/0053 ,  G06T2201/0202

    Abstract: Methods, devices, systems and computer program products facilitate embedding and extraction of transactional watermarks into and from a video content. One such method includes selecting a first number of frames from a video content and performing temporal and a spatial psychovisual analysis on the selected frames. For each selected frame, at least one area for insertion of watermarks is identified. A first and a second watermark symbol is embedded separately in the identified area(s), and the embedded frames are re-encoded to obtain a first and a second alternative data. An inserter manifest is formed that includes the first and the second alternative data to enable insertion of a watermark into the video content by selecting one or the other of the first and second alternative data for insertion into the video content.

    Abstract translation: 方法，设备，系统和计算机程序产品有助于将事务水印嵌入和提取到视频内容中。 一种这样的方法包括从视频内容中选择第一数量的帧，并对所选择的帧执行时间和空间心理视觉分析。 对于每个所选择的帧，识别用于插入水印的至少一个区域。 将第一和第二水印符号分别嵌入所识别的区域中，并且嵌入的帧被重新编码以获得第一和第二替代数据。 形成插入器清单，其包括第一和第二备选数据，以通过选择用于插入到视频内容中的第一和第二备选数据中的一个或另一个来使水印插入到视频内容中。

    Circumvention of watermark analysis in a host content
    75.
    发明授权
    Circumvention of watermark analysis in a host content 有权
    在主机内容中规避水印分析

    公开(公告)号：US09153006B2

    公开(公告)日：2015-10-06

    申请号：US14460730

    申请日：2014-08-15

    Applicant: Verance Corporation

    Inventor： Rade Petrovic ,  Babak Tehranchi ,  Joseph M. Winograd ,  Kanaan Jemili

    IPC: G06K9/00 ,  G06T1/00 ,  G10L19/018 ,  H04N1/32 ,  G09C5/00

    CPC classification number: G06T1/005 ,  G06T1/0028 ,  G06T1/0071 ,  G06T2201/0202 ,  G09C5/00 ,  G10L19/018 ,  H04L2209/608 ,  H04N1/32203 ,  H04N1/32245 ,  H04N1/32299 ,  H04N1/32315 ,  H04N2201/3233

    Abstract: Methods and devices are provided to thwart analysis of a watermarking system by preventing analysis of watermarks in a host content. Upon receiving a content at a watermark embedding device, the content is analyzed to ascertain whether one or more test features are present in at least a first portion of the received content. When the analysis reveals that one or more test features are present, embedding of watermarks in at least the first portion of the received content is disabled. The test features of interest include a temporal, a spatial and/or a frequency characteristic such that, if a region of the content that includes test feature is embedded with a watermark, at least one characteristic of the embedded watermark is detectable upon analysis of that region. The test feature can, for example, approximate an impulse signal, a step function signal or a pure sinusoidal signal.

    Abstract translation: 提供方法和设备，通过防止主机内容中的水印的分析来阻止水印系统的分析。 在水印嵌入装置接收到内容时，分析内容以确定在所接收的内容的至少第一部分中是否存在一个或多个测试特征。 当分析显示存在一个或多个测试特征时，水印在至少接收的内容的第一部分中的嵌入被禁用。 感兴趣的测试特征包括时间，空间和/或频率特性，使得如果包括测试特征的内容的区域被嵌入水印，则在分析该嵌入水印时，嵌入水印的至少一个特性是可检测的 地区。 测试特征可以例如近似脉冲信号，阶梯函数信号或纯正弦信号。

    ASSESSMENT OF CAMERA PHONE DISTORTION FOR DIGITAL WATERMARKING
    76.
    发明申请
    ASSESSMENT OF CAMERA PHONE DISTORTION FOR DIGITAL WATERMARKING 有权
    摄像机电话失真对数字水印的评估

    公开(公告)号：US20150242985A1

    公开(公告)日：2015-08-27

    申请号：US14579371

    申请日：2014-12-22

    Applicant: Digimarc Corporation

    Inventor： Alastair M. Reed

    IPC: G06T1/00

    CPC classification number: G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0202

    Abstract: The present disclosure relates generally to cell phones and cameras, and to digital watermarking involving such cell phones and cameras. One claim recites a method comprising: measuring distortion introduced by a cell phone camera; using a programmed electronic processor, quantifying the distortion; and providing quantified distortion as feedback to adjust a digital watermark embedding process in view of the distortion introduced by the cell phone camera. The act of quantifying distortion may include, e.g., quantifying a spatial frequency response (SFR) of the cell phone camera. Of course, other claims and combinations are provided too.

    Abstract translation: 本公开一般涉及蜂窝电话和相机，以及涉及这种蜂窝电话和相机的数字水印。 一个权利要求描述了一种方法，包括：测量由手机摄像机引入的失真; 使用编程的电子处理器，量化失真; 并且考虑到由手机摄像机引入的失真，提供量化失真作为反馈以调整数字水印嵌入处理。 量化失真的动作可以包括例如量化手机摄像机的空间频率响应（SFR）。 当然，也提供其他权利要求和组合。

    WATERMARK EXTRACTOR ENHANCEMENTS BASED ON PAYLOAD RANKING
    78.
    发明申请
    WATERMARK EXTRACTOR ENHANCEMENTS BASED ON PAYLOAD RANKING 有权
    基于PAYLOAD排名的WATERMARK提取器增强

    公开(公告)号：US20150030200A1

    公开(公告)日：2015-01-29

    申请号：US13948618

    申请日：2013-07-23

    Applicant: Verance Corporation

    Inventor： Rade Petrovic ,  Joseph M. Winograd ,  Patrick George Downes

    IPC: G06T1/00

    CPC classification number: G06T1/005 ,  G06T1/0028 ,  G06T2201/0065 ,  G06T2201/0202

    Abstract: Methods, devices, systems and computer program products improve the detection of watermarks that are embedded in a host content by providing information indicative of a ranking of watermark payloads to watermark extractors. A watermark extractor device obtains information indicative of a ranking of a plurality of watermark payload values, where such information designates each watermark payload value within a first subset of the plurality of watermark payload values as having an associated rank value. Based at least in-part on the information indicative of the ranking, the watermark extractor device is configured to prioritize resource allocation for extraction of payload values that are designated as belonging to the first subset over payload values that are not designated as belonging to the first subset. The watermark extractor then extracts a payload value, designated as belonging to the first subset, from one or more watermarks embedded in the host content.

    Abstract translation: 方法，设备，系统和计算机程序产品通过向水印提取器提供指示水印有效载荷的排序的信息来改进嵌入在主机内容中的水印的检测。 水印提取器装置获得指示多个水印有效负载值的排序的信息，其中这样的信息将多个水印有效载荷值的第一子集内的每个水印有效载荷值指定为具有相关联的等级值。 至少部分地基于指示排序的信息，水印提取器设备被配置为优先化资源分配以提取被指定为属于第一子集的有效载荷值，该有效载荷值未被指定为属于第一 子集。 然后，水印提取器从嵌入在主机内容中的一个或多个水印提取被指定为属于第一子集的有效载荷值。

    Method for watermarking a digital data set and device implementing said method
    80.
    发明授权
    Method for watermarking a digital data set and device implementing said method 有权
    用于对数字数据集进行水印处理的方法和实现所述方法的装置

    公开(公告)号：US08064635B2

    公开(公告)日：2011-11-22

    申请号：US12086573

    申请日：2006-12-11

    Applicant: Séverine Baudry ,  Corinne Naturel ,  Philippe Nguyen

    Inventor： Séverine Baudry ,  Corinne Naturel ,  Philippe Nguyen

    IPC: G06K9/00 ,  H04N11/02

    CPC classification number: H04N17/004 ,  G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0202 ,  H04N21/23892 ,  H04N21/44008 ,  H04N21/8358

    Abstract: The invention relates to a method of watermarking a data set comprising the steps of: selecting, in the data set, at least one group of two data; and modifying at least one data of the group. The data is modified such that the difference between the modified data and the other data of the group possibly modified equals a predefined watermarking parameter multiplied by an integer number, called rejection class, associated with the group and equal to the integer nearest to the ratio between the difference between the at least one data and the other data of the group before the modification divided by the watermarking parameter.

    Abstract translation: 本发明涉及一种对数据集进行水印处理的方法，包括以下步骤：在数据集中选择至少一组两个数据; 以及修改该组的至少一个数据。 修改数据使得修改的数据与可能修改的组的其他数据之间的差异等于预定义的水印参数乘以与组相关联的称为拒绝类的整数，并且等于最接近于 所述修改之前的所述组的所述至少一个数据与所述其他数据之间的差除以所述水印参数。

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