Robust signatures derived from local nonlinear filters
    73.
    发明授权
    Robust signatures derived from local nonlinear filters 有权
    来自局部非线性滤波器的稳健签名

    公开(公告)号:US08687839B2

    公开(公告)日:2014-04-01

    申请号:US12784736

    申请日:2010-05-21

    申请人: Ravi K. Sharma

    发明人: Ravi K. Sharma

    IPC分类号: G06K9/00 G06K9/46 G06K9/68

    摘要: Content signal recognition is based on a multi-axis filtering of the content signal. The signatures are calculated, formed into data structures and organized in a database for quick searching and matching operations used in content recognition. For content recognition, signals are sampled and transformed into signatures using the multi axis filter. The database is searched to recognize the signals as part of a content item in the database. Using the content identification, content metadata is retrieved and provided for a variety of applications. In one application, the metadata is provided in response to a content identification request.

    摘要翻译: 内容信号识别基于内容信号的多轴滤波。 计算签名,形成数据结构,并组织在数据库中,用于内容识别中的快速搜索和匹配操作。 对于内容识别,使用多轴滤波器对信号进行采样并转换为签名。 搜索数据库以将信号识别为数据库中内容项的一部分。 使用内容标识,检索内容元数据并为各种应用程序提供内容元数据。 在一个应用中,响应于内容标识请求提供元数据。

    Authenticating identification and security documents
    75.
    发明授权
    Authenticating identification and security documents 有权
    验证身份证件和安全文件

    公开(公告)号:US08194919B2

    公开(公告)日:2012-06-05

    申请号:US12970629

    申请日:2010-12-16

    摘要: The application discloses identification and security documents and methods and systems for authenticating such identification and security documents. In one implementation, a document includes a first surface; and a second surface. The first surface comprises a first set of print structures and a second set of print structures. The first set of print structures and the second set of print structures cooperate to obscure the location on the first surface of the second set of print structures. The second set of print structures is arranged on the first surface so as to provide a reflection pattern. In one example, the reflection pattern includes a diffraction grating. The second set of print structures is preferably provided on the first surface with metallic ink. Of course, other claims and combinations are provided too.

    摘要翻译: 该申请公开了用于认证这种识别和安全文件的识别和安全文件和方法和系统。 在一个实现中,文档包括第一表面; 和第二表面。 第一表面包括第一组打印结构和第二组打印结构。 第一组打印结构和第二组打印结构相配合以掩盖第二组打印结构的第一表面上的位置。 第二组打印结构布置在第一表面上以提供反射图案。 在一个示例中,反射图案包括衍射光栅。 第二组打印结构优选地在金属墨水的第一表面上设置。 当然,也提供其他权利要求和组合。

    Signal Processors and Methods for Estimating Transformations Between Signals with Least Squares
    76.
    发明申请
    Signal Processors and Methods for Estimating Transformations Between Signals with Least Squares 有权
    信号处理器和估计信号与最小二乘法之间的转换的方法

    公开(公告)号:US20120078989A1

    公开(公告)日:2012-03-29

    申请号:US13224608

    申请日:2011-09-02

    IPC分类号: G06F17/14

    摘要: Signal processing devices and methods estimate transforms between signals using a least squares technique. From a seed set of transform candidates, a direct least squares method applies a seed transform candidate to a reference signal and then measures correlation between the transformed reference signal and a suspect signal. For each candidate, update coordinates of reference signal features are identified in the suspect signal and provided as input to a least squares method to compute an update to the transform candidate. The method iterates so long as the update of the transform provides a better correlation. At the end of the process, the method identifies a transform or set of top transforms based on a further analysis of correlation, as well as other results.

    摘要翻译: 信号处理装置和方法使用最小二乘法估计信号之间的变换。 从种子变换候选组中,直接最小二乘法将种子变换候选应用于参考信号,然后测量变换的参考信号与可疑信号之间的相关性。 对于每个候选者,参考信号特征的更新坐标在可疑信号中被识别,并作为输入提供给最小二乘法以计算变换候选的更新。 只要变换的更新提供了更好的相关性,该方法将重复。 在该过程结束时,该方法基于对相关性的进一步分析以及其他结果来识别变换或顶点变换集合。

    Signal embedding and detection using circular structures in a transform domain of a media signal
    78.
    发明授权
    Signal embedding and detection using circular structures in a transform domain of a media signal 有权
    在媒体信号的变换域中使用圆形结构的信号嵌入和检测

    公开(公告)号:US07986807B2

    公开(公告)日:2011-07-26

    申请号:US12273423

    申请日:2008-11-18

    IPC分类号: H04K1/00

    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。