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公开(公告)号：US10176545B2
公开(公告)日：2019-01-08
申请号：US15650597
申请日：2017-07-14
Applicant: Digimarc Corporation
Inventor： Alastair M. Reed , Ravi K. Sharma
Abstract: The present disclosures relates generally to digital watermarking and data hiding. One claim recites a smartphone comprising: a camera to capture video of a display that is rendering video, in which the video comprises a first watermark signal embedded in a first portion of the data, a second watermark signal embedded in a second portion of the data, and a third watermark signal embedded in a third portion of the data, in which at least two of the first watermark signal, second watermark signal and third watermark signal are inversely related to one another; electronic memory for buffering data representing captured video; one or more electronic processors programmed for: applying a first perspective distortion to the data representing the captured video to yield first perspective distorted video; and analyzing the first perspective distorted video to detect digital watermarking, in which a second perspective distortion is applied to the data representing the captured video to yield second perspective distorted video when the analyzing does not detect digital watermarking, and then performing analyzing the second perspective distorted video to detect digital watermarking. Of course, other claims are provided too.
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62.发明申请公开(公告)号：US20180330464A1
公开(公告)日：2018-11-15
申请号：US15967214
申请日：2018-04-30
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：US20180211673A1
公开(公告)日：2018-07-26
申请号：US15848339
申请日：2017-12-20
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 , G10L19/02
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.
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公开(公告)号：US20180130165A1
公开(公告)日：2018-05-10
申请号：US15650597
申请日：2017-07-14
Applicant: Digimarc Corporation
Inventor： Alastair M. Reed , Ravi K. Sharma
CPC classification number: G06T1/005 , G06K9/00 , G06T1/00 , G06T1/0021 , G06T1/0085 , G06T2201/0051 , G06T2201/0065
Abstract: The present disclosures relates generally to digital watermarking and data hiding. One claim recites a smartphone comprising: a camera to capture video of a display that is rendering video, in which the video comprises a first watermark signal embedded in a first portion of the data, a second watermark signal embedded in a second portion of the data, and a third watermark signal embedded in a third portion of the data, in which at least two of the first watermark signal, second watermark signal and third watermark signal are inversely related to one another; electronic memory for buffering data representing captured video; one or more electronic processors programmed for: applying a first perspective distortion to the data representing the captured video to yield first perspective distorted video; and analyzing the first perspective distorted video to detect digital watermarking, in which a second perspective distortion is applied to the data representing the captured video to yield second perspective distorted video when the analyzing does not detect digital watermarking, and then performing analyzing the second perspective distorted video to detect digital watermarking. Of course, other claims are provided too.
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公开(公告)号：US09852736B2
公开(公告)日：2017-12-26
申请号：US15090279
申请日：2016-04-04
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , Brett A. Bradley , Yang Bai , Shankar Thagadur Shivappa , Ajith Kamath , Aparna Gurijala , David A. Cushman
IPC: G10L19/00 , G10L19/018 , G10L19/02
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.
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Patent Agency Ranking
公开(公告)号：US09811757B2
公开(公告)日：2017-11-07
申请号：US15224975
申请日：2016-08-01
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma
CPC classification number: G06K9/4642 , G06F17/30256 , G06K9/38 , G06K9/4652 , G06K9/6201 , G06K9/6212 , G06T7/11 , H04M2250/52
Abstract: A multidimensional histogram is used to characterize an image (or object), and is used to identify candidate matches with one or more reference images (or objects). An exemplary implementation employs hue information for two of the dimensions, and a second derivative function based on luminance for a third dimension. The simplicity and speed of the detailed arrangements make them well suited for use with cell phones and other mobile devices, which can use the technology for image/object recognition, e.g., in visual search applications.
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公开(公告)号：US20170143249A1
公开(公告)日：2017-05-25
申请号：US15362446
申请日：2016-11-28
Applicant: Digimarc Corporation
Inventor： Bruce L. Davis , Tony F. Rodriguez , Alastair M. Reed , John Stach , Geoffrey B. Rhoads , William Y. Conwell , Shankar Thagadur Shivappa , Ravi K. Sharma , Richard F. Gibson
CPC classification number: A61B5/441 , A61B5/0075 , A61B5/0077 , A61B5/1032 , A61B5/1034 , A61B5/444 , A61B5/445 , A61B5/4806 , A61B5/6898 , A61B5/7246 , A61B5/7278 , A61B5/7282 , A61B5/7425 , A61B5/743 , A61B5/7485 , A61B2576/02 , G06F17/30424 , G06F17/30554 , G06F19/00 , G06F19/3418 , G06T5/40 , G06T7/0012 , G06T2207/30088 , G10L19/018 , G16H50/20 , G16H50/70 , Y02A90/26
Abstract: Reference imagery of dermatological conditions is compiled in a crowd-sourced database (contributed by clinicians and/or the lay public), together with associated diagnosis information. A user later submits a query image to the system (e.g., captured with a smartphone). Image-based derivatives for the query image are determined (e.g., color histograms, FFT-based metrics, etc.), and are compared against similar derivatives computed from the reference imagery. This comparison identifies diseases that are not consistent with the query image, and such information is reported to the user. Depending on the size of the database, and the specificity of the data, 90% or more of candidate conditions may be effectively ruled-out, possibly sparing the user from expensive and painful biopsy procedures, and granting some peace of mind (e.g., knowledge that an emerging pattern of small lesions on a forearm is probably not caused by shingles, bedbugs, malaria or AIDS). A great number of other features and arrangements are also detailed.
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公开(公告)号：US09405991B2
公开(公告)日：2016-08-02
申请号：US14853408
申请日：2015-09-14
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma
CPC classification number: G06K9/4642 , G06F17/30256 , G06K9/38 , G06K9/4652 , G06K9/6201 , G06K9/6212 , G06T7/11 , H04M2250/52
Abstract: A multidimensional histogram is used to characterize an image (or object), and is used to identify candidate matches with one or more reference images (or objects). An exemplary implementation employs hue information for two of the dimensions, and a second derivative function based on luminance for a third dimension. The simplicity and speed of the detailed arrangements make them well suited for use with cell phones and other mobile devices, which can use the technology for image/object recognition, e.g., in visual search applications.
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公开(公告)号：US20160156805A1
公开(公告)日：2016-06-02
申请号：US14936263
申请日：2015-11-09
Applicant: Digimarc Corporation
Inventor： Alastair M. Reed , Ravi K. Sharma , Tony F. Rodriguez
CPC classification number: G06T1/005 , G06T1/0021 , G06T11/001 , G06T2201/0083 , H04N1/32144 , H04N1/32267 , H04N1/32309 , H04N1/6005 , H04N1/6008 , H04N2201/3228 , H04N2201/3233 , H04N2201/327
Abstract: This patent document relates generally to steganography and digital watermarking. One claim recites an apparatus comprising: electronic memory for buffering samples corresponding to a digital image; means for analyzing a digital image relative to an expected workflow process, the expected workflow process comprising optical capture of a printed version of the digital image, the digital image comprising data representing process colors CMY; means for applying tone correction to the digital image, said means for applying yielding an altered digital image; means for transforming the altered digital image with digital watermarking, the digital watermarking conveying a plural-bit message; and a processor configured for providing the transformed, altered digital image. Of course, other claims and combinations are provided too.
Abstract translation: 该专利文献一般涉及隐写术和数字水印。 一个权利要求记载一种装置，包括：用于缓冲对应于数字图像的样本的电子存储器; 用于相对于期望的工作流过程分析数字图像的装置，所述预期工作流程包括数字图像的打印版本的光学捕获，所述数字图像包括表示处理颜色CMY的数据; 用于对数字图像应用色调校正的装置，所述用于应用的装置产生改变的数字图像; 用于利用数字水印变换改变的数字图像的装置，数字水印传送多位消息; 以及配置用于提供经变换的改变的数字图像的处理器。 当然，也提供其他权利要求和组合。
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公开(公告)号：US09317888B2
公开(公告)日：2016-04-19
申请号：US14572478
申请日：2014-12-16
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 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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