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公开(公告)号：US09832353B2
公开(公告)日：2017-11-28
申请号：US14611515
申请日：2015-02-02
Applicant: Digimarc Corporation
Inventor： Matthew M. Weaver , Ravi K. Sharma
IPC: G06F21/16 , H04N5/225 , H04N21/2389 , H04N21/44 , H04N21/8358 , G09C5/00
CPC classification number: H04N5/225 , G06F21/16 , G09C5/00 , H04L2209/34 , H04L2209/608 , H04N21/23892 , H04N21/44008 , H04N21/8358
Abstract: The disclosure relates to digital watermarking, steganography, and specifically to message coding protocols used in conjunction with digital watermarking and steganographic encoding/decoding and payload interpretation methods. One claim recites a method for interpreting a data structure having fixed and variable message portions, the method comprising: processing the fixed message portion to determine a version of the variable message portion; decoding the entire payload field of the variable message portion according to the determined version; and interpreting only a portion of the decoded payload field according to the determined version. Of course, other features and claims are provided too.
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42.发明申请公开(公告)号：US20170193628A1
公开(公告)日：2017-07-06
申请号：US15211944
申请日：2016-07-15
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , John D. Lord , Robert G. Lyons , Osama M. Alattar , Jacob L. Boles
CPC classification number: G06T1/0064 , G06K9/6206 , G06T3/0006 , G06T3/0056 , G06T2201/0052 , G06T2201/0065 , G06T2201/0081
Abstract: Signal processing devices and methods estimate a geometric transform of an image signal. 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 an image signal in which the reference signal is encoded. Geometric transform candidates encompass differential scale and shear, which are useful in approximating a perspective transform. For each candidate, update coordinates of reference signal features are identified in the image 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 geometric transform or set of top transforms based on a further analysis of correlation, as well as other results. Phase characteristics are exploited in the process of updating coordinates and measuring correlation. The geometric transform is used as an approximation of the geometric distortion of an image after digital data is encoded in it, and is used to compensate for this distortion to facilitate extracting embedded digital messages from the image. Due to the errors in the approximation, a signal confidence metric is determined and used to weight message symbol estimates extracted from the image.
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公开(公告)号：US09665919B2
公开(公告)日：2017-05-30
申请号：US15131961
申请日：2016-04-18
Applicant: Digimarc Corporation
Inventor： Alastair M. Reed , Ravi K. Sharma
CPC classification number: G06T1/0028 , G06K9/00 , G06T1/0021 , G06T1/005 , G06T2201/0051 , G06T2201/0052 , G06T2201/0601 , H04N1/32309
Abstract: The present invention relate generally to digital watermarking and data hiding. One claim recites an apparatus comprising: electronic memory for storing first color data and second color data, the first color data and the second color data represent data from a color image signal or color video signal, and a digital watermark signal, the digital watermark signal serving to facilitate detection of a watermark message; means for separating the digital watermark signal into first frequency components and second frequency components; means for modifying the first color data by hiding the first frequency components therein; and means for modifying the second color data by hiding the second frequency components therein. Of course, other combinations and claims are provided too.
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公开(公告)号：US20170024840A1
公开(公告)日：2017-01-26
申请号：US15072884
申请日：2016-03-17
Applicant: Digimarc Corporation
Inventor： Vojtech Holub , Donald Haaga , Ravi K. Sharma , Jeffrey B. Schulte , Eric D. Evans
Abstract: The present disclosure relates to advanced image processing and encoded signal processing. One claim currently recites an image processing method comprising the acts: receiving a digital representation of artwork, the artwork having an area of uniform color; generating a two-dimensional data signal that redundantly encodes a plural-bit message, the data signal comprising plural elements, each of which has a single bit value; receiving a two-dimensional synchronization signal comprising plural elements, each of which has a plural-bit value, each element of said data signal having an element of the synchronization signal corresponding thereto; processing the two-dimensional data signal with the two-dimensional synchronization signal and with a gradient function to yield a two-dimensional gradient marking signal; and printing an ink counterpart of the gradient marking signal on a medium with the artwork, said printing comprising printing plural dithered two-dimensional blocks of at least four contiguous elements each, in which one or more elements of each block are printed to be dark. Of course, other claims and combinations are described as well.
Abstract translation: 本公开涉及高级图像处理和编码信号处理。 一个声称当前背诵包括以下动作的图像处理方法：接收艺术品的数字表示，艺术品具有均匀颜色的区域; 生成对多位消息进行冗余编码的二维数据信号，所述数据信号包括多个元素，每个元素具有单个位值; 接收包括多个元素的二维同步信号，每个元素具有多位值，所述数据信号的每个元素具有与其对应的同步信号的元素; 用二维同步信号和梯度函数处理二维数据信号以产生二维梯度标记信号; 并且在具有所述图形的介质上印刷所述梯度标记信号的墨水对应物，所述打印包括打印每个块的至少四个连续元件的多个抖动二维块，其中每个块的一个或多个元件被打印为较暗。 当然，还描述了其它权利要求和组合。
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45.发明申请SIGNAL PROCESSORS AND METHODS FOR ESTIMATING TRANSFORMATIONS BETWEEN SIGNALS WITH LEAST SQUARES 审中-公开信号处理器和估计信号与最小二乘法之间的变换的方法公开(公告)号：US20160132986A1
公开(公告)日：2016-05-12
申请号：US14936359
申请日：2015-11-09
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , John D. Lord , Robert G. Lyons
CPC classification number: G06T1/0064 , G06F1/02 , G06K9/6206 , G06T1/0021 , G06T3/0006 , G06T3/0056
Abstract: 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.
Abstract translation: 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。
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Patent Agency Ranking
公开(公告)号：US09325819B2
公开(公告)日：2016-04-26
申请号：US14248057
申请日：2014-04-08
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , Tony F. Rodriguez
CPC classification number: G06F17/30743 , G05B2219/24162 , G06K9/00503 , G06K9/0053 , G06T1/0064 , G06T2201/0052 , G10L25/18 , G10L25/21 , H04M1/0264 , H04N1/00204 , H04N1/00244 , H04N1/00307 , H04N1/00358 , H04N1/00363 , H04N1/00973 , H04N1/32117 , H04N1/32144 , H04N1/3216 , H04N2201/0096 , H04N2201/3226 , H04N2201/3233 , H04N2201/327 , H04N2201/3278 , H04W88/02
Abstract: This disclosure describes a distributed reader architecture for a mobile computing device such as cellular telephone handset. One claim recites a method for identifying a content item from a host signal captured on a mobile telephone handset, comprising: from the handset, receiving filtered data from the host signal for use in identifying the content item; processing the filtered data to compute a content fingerprints; using the content fingerprints to determine an action associated with the content item, in which said determining utilizes information pertaining to an operating system associated with the mobile telephone handset; and communicating information associated with the action to the mobile telephone handset. Of course, other claims and combinations are provided as well.
Abstract translation: 本公开描述了用于诸如蜂窝电话手机的移动计算设备的分布式读取器架构。 一个权利要求描述了从移动电话手持机上捕获的主机信号中识别内容项的方法，包括：从手机接收来自主机信号的滤波数据，用于识别内容项; 处理过滤数据以计算内容指纹; 使用所述内容指纹来确定与所述内容项相关联的动作，其中所述确定利用与所述移动电话手机相关联的操作系统有关的信息; 以及将与所述动作相关联的信息传送到所述移动电话手机。 当然，也提供其他权利要求和组合。
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47.发明申请METHODS FOR ENCODING, DECODING AND INTERPRETING AUXILIARY DATA IN MEDIA SIGNALS 有权在媒体信号中编码，解码和解码辅助数据的方法公开(公告)号：US20150302543A1
公开(公告)日：2015-10-22
申请号：US14611515
申请日：2015-02-02
Applicant: Digimarc Corporation
Inventor： Matthew M. Weaver , Ravi K. Sharma
CPC classification number: H04N5/225 , G06F21/16 , G09C5/00 , H04L2209/34 , H04L2209/608 , H04N21/23892 , H04N21/44008 , H04N21/8358
Abstract: The disclosure relates to digital watermarking, steganography, and specifically to message coding protocols used in conjunction with digital watermarking and steganographic encoding/decoding and payload interpretation methods. One claim recites a method for interpreting a data structure having fixed and variable message portions, the method comprising: processing the fixed message portion to determine a version of the variable message portion; decoding the entire payload field of the variable message portion according to the determined version; and interpreting only a portion of the decoded payload field according to the determined version. Of course, other features and claims are provided too.
Abstract translation: 本公开涉及数字水印，隐写术，特别是与数字水印和隐写编码/解码和有效载荷解释方法结合使用的消息编码协议。 一个权利要求描述了一种用于解释具有固定和可变消息部分的数据结构的方法，所述方法包括：处理固定消息部分以确定可变消息部分的版本; 根据确定的版本对可变消息部分的整个有效载荷字段进行解码; 并且根据所确定的版本仅解释解码的有效负载字段的一部分。 当然，也提供其他功能和要求。
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公开(公告)号：US20140343931A1
公开(公告)日：2014-11-20
申请号：US14242774
申请日：2014-04-01
Applicant: DIGIMARC CORPORATION
Inventor： Ravi K. Sharma
IPC: G06F17/30 , G06K9/62 , G10L19/022 , G10L19/02 , G10L19/032
CPC classification number: G06F17/30743 , G06F17/30761 , G06F17/30781 , G06K9/6201 , G10L19/02 , G10L19/022 , G10L19/032 , H04H60/37 , H04H60/58 , H04H60/59 , H04H60/73
Abstract: 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.
Abstract translation: 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。
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49.发明申请公开(公告)号：US20140142958A1
公开(公告)日：2014-05-22
申请号：US14054492
申请日：2013-10-15
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , Brett A. Bradley , Yang Bai , Shankar Thagadur Shivappa , Ajith Kamath , Aparna Gurijala , Tomas Filler , David A. Cushman
IPC: G10L19/018
CPC classification number: G10L19/018 , G10L19/02
Abstract: Audio signal processing enhances audio watermark embedding and detecting processes. Audio signal processes include audio classification and adapting watermark embedding and detecting based on classification. Advances in audio watermark design include adaptive watermark signal structure data protocols, perceptual models, and insertion methods. Perceptual and robustness evaluation is integrated into audio watermark embedding to optimize audio quality relative the original signal, and to optimize robustness or data capacity. These methods are applied to audio segments in audio embedder and detector configurations to support real time operation. Feature extraction and matching are also used to adapt audio watermark embedding and detecting.
Abstract translation: 音频信号处理增强了音频水印嵌入和检测过程。 音频信号处理包括基于分类的音频分类和适应水印嵌入和检测。 音频水印设计的进步包括自适应水印信号结构数据协议，感知模型和插入方法。 感知和鲁棒性评估集成到音频水印嵌入中，以优化相对于原始信号的音频质量，并优化鲁棒性或数据容量。 这些方法适用于音频嵌入器和检测器配置中的音频段，以支持实时操作。 特征提取和匹配也用于适应音频水印嵌入和检测。
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公开(公告)号：US20140093120A1
公开(公告)日：2014-04-03
申请号：US13963627
申请日：2013-08-09
Applicant: Digimarc Corporation
Inventor： Alastair M. Reed , Ravi K. Sharma
IPC: G06T1/00
CPC classification number: G06T1/0028 , G06K9/00 , G06T1/0021 , G06T1/005 , G06T2201/0051 , G06T2201/0052 , G06T2201/0601 , H04N1/32309
Abstract: The present invention relate generally to digital watermarking and data hiding. One claim recites a method including: obtaining first data and second color data, the first color data and the second color data represent data from a color image signal or color video signal; obtaining a digital watermark pattern, the pattern aiding detection of a watermark message; separating the digital watermark pattern into first frequency components and second frequency components; utilizing a programmed electronic processor or electronic processing circuitry, modifying the first color data by hiding the first frequency components therein; and utilizing a programmed electronic processor or electronic processing circuitry, modifying the second color data by hiding the second frequency components therein. Of course, other combinations and claims are provided too.
Abstract translation: 本发明一般涉及数字水印和数据隐藏。 一个权利要求描述了一种方法，包括：获得第一数据和第二颜色数据，第一颜色数据和第二颜色数据表示来自彩色图像信号或彩色视频信号的数据; 获取数字水印图案，水印消息的图案辅助检测; 将数字水印图案分离为第一频率分量和第二频率分量; 利用编程的电子处理器或电子处理电路，通过在其中隐藏第一频率分量来修改第一颜色数据; 以及利用编程的电子处理器或电子处理电路，通过在其中隐藏第二频率分量来修改第二颜色数据。 当然，也提供其他组合和权利要求。
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