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51.发明授权公开(公告)号：US12014441B2
公开(公告)日：2024-06-18
申请号：US17479910
申请日：2021-09-20
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , John D. Lord , Robert G. Lyons , Osama M. Alattar , Jacob L Boles
CPC classification number: G06T1/0064 , G06T3/02 , G06T3/10 , G06T2201/0052 , G06T2201/0065 , G06T2201/0081
Abstract: Signal processing devices and methods estimate a geometric transform of an image. One method measures correlation between a transformed reference signal component and an image, updates, based on the measured correlation that is below a threshold, coordinates of the reference signal component to a location within a neighborhood around the coordinates of the transformed reference signal component; determines a new geometric transform that transforms the reference signal components to updated coordinates; and applies the new geometric transform to extract encoded digital data from the image.
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公开(公告)号：US11990143B2
公开(公告)日：2024-05-21
申请号：US17532884
申请日：2021-11-22
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: G10L19/00 , 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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公开(公告)号：US11651469B2
公开(公告)日：2023-05-16
申请号：US17126530
申请日：2020-12-18
Applicant: Digimarc Corporation
Inventor： John F. Stach , Ravi K. Sharma , Ajith M. Kamath
CPC classification number: G06T1/005 , G06K19/06103 , G06T1/0028 , G06T1/0071 , G06T1/0092 , G06T3/20 , G06T5/002 , G06T5/30 , G06T11/60 , G06T2201/0051 , G06T2201/0061 , G06T2201/0202 , G06T2201/0601 , G06T2207/20044
Abstract: Artwork carrying machine readable data is generated by editing artwork according to a data signal or transforming the data signal into artwork. The machine-readable data signal is generated from a digital payload and converted into an image tile. Artwork is edited according to the image tile by moving graphic elements, adapting intersections of lines, or altering line density, among other techniques. Artwork is generated from the data signal by skeletonizing it and applying morphological operators to a skeletal representation, such as a medial axis transform. Artistic effects are introduced by filtering the data signal with directional blurring or shape filters.
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公开(公告)号：US20220331841A1
公开(公告)日：2022-10-20
申请号：US17721694
申请日：2022-04-15
Applicant: Digimarc Corporation
Inventor： Tomas Filler , Vojtech Holub , Ravi K. Sharma , Tony F. Rodriguez , Osama M. Alattar , Adnan M. Alattar , Hugh L. Brunk , Brett A. Bradley , Ajith M. Kamath
Abstract: A waste stream is analyzed and sorted to segregate different items for recycling. Certain features of the technology improve the accuracy with which waste stream items are diverted to collection repositories. Other features concern adaptation of neural networks in accordance with context information sensed from the waste. Still other features serve to automate and simplify maintenance of machine vision systems used in waste sorting. Yet other aspects of the technology concern marking 2D machine readable code data on items having complex surfaces (e.g., food containers with integral ribbing for structural strength or juice pooling), to mitigate issues that such surfaces can introduce in code reading. Still other aspects of the technology concern prioritizing certain blocks of conveyor belt imagery for analysis. Yet other aspects of the technology concern joint use of near infrared spectroscopy, artificial intelligence, digital watermarking, and/or other techniques, for waste sorting. A variety of further features and arrangements are also detailed.
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公开(公告)号：US20220055071A1
公开(公告)日：2022-02-24
申请号：US17470674
申请日：2021-09-09
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , Tomas Filler , Vojtech Holub , Osama M. Alattar , Hugh L. Brunk , John D. Lord , Geoffrey B. Rhoads , William Y. Conwell , Ajith M. Kamath
Abstract: A plastic item, such as a beverage bottle, can convey two distinct digital watermarks, encoded using two distinct signaling protocols. A first, printed label watermark conveys a retailing payload, including a Global Trade Item Number (GTIN) used by a point-of-sale scanner in a retail store to identify and price the item when presented for checkout. A second, plastic texture watermark may convey a recycling payload, including data identifying the composition of the plastic. The use of two different signaling protocols assures that a point-of-sale scanner will not spend its limited time and computational resources working to decode the recycling watermark, which may lack data needed for retail checkout. In some embodiments, a recycling apparatus makes advantageous use of both types of watermarks to identify the plastic composition of the item (e.g., relating GTIN to plastic type using an associated database), thereby increasing the fraction of items that are correctly identified for sorting and recycling. In other embodiments the plastic item (or a label thereon) bears only a single watermark. A great number of other features and arrangements are also detailed.
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Patent Agency Ranking
公开(公告)号：US20210352192A1
公开(公告)日：2021-11-11
申请号：US17371964
申请日：2021-07-09
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , Tomas Filler , Vojtech Holub , Osama M. Alattar , Hugh L. Brunk , John D. Lord , William Y. Conwell
IPC: H04N5/225 , G06F21/16 , H04N21/44 , H04N21/2389 , H04N21/8358 , G09C5/00
Abstract: A plastic item, such as a beverage bottle, conveys two distinct digital watermarks, encoded using two distinct signaling protocols. A first, printed label watermark conveys a retailing payload, including a Global Trade Item Number (GTIN) used by a point-of-sale scanner in a retail store to identify and price the item when presented for checkout. A second, plastic texture watermark conveys a recycling payload, including data identifying the composition of the plastic. The use of two different signaling protocols assures that a point-of-sale scanner will not spend its limited time and computational resources working to decode the recycling watermark, which lacks the data needed for retail checkout. In some embodiments, a recycling apparatus makes advantageous use of both types of watermarks to identify the plastic composition of the item (e.g., relating GTIN to plastic type using an associated database), thereby increasing the fraction of items that are correctly identified for sorting and recycling. A great number of other features and arrangements are also detailed.
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57.发明申请公开(公告)号：US20200065933A1
公开(公告)日：2020-02-27
申请号：US16557929
申请日：2019-08-30
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , John D. Lord , Robert G. Lyons
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.
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公开(公告)号：US20190302222A1
公开(公告)日：2019-10-03
申请号：US16377700
申请日：2019-04-08
Applicant: Digimarc Corporation
Inventor： Brett A. Bradley , Ravi K. Sharma , Shankar Thagadur Shivappa , John D. Lord
Abstract: Mobile device positioning employs various forms of audio signal structures and detection methodologies. In one method, detection of an audio signal from a first source enables construction of a signal to facilitate detection of an audio signal from another source. Signals detected from these sources enable positioning of the mobile device receiving those signals. Another method forms audio signals transmitted from audio sources so that they have parts that add constructively and parts that differentiate the sources to enable positioning. Another audio signal based positioning method adaptively switches among positioning methods so that positioning remains operative as a mobile device moves toward and away from the sources. Another method tracks positioning history, evaluates it for errors and performs error mitigation to improve accuracy. Various other positioning technologies are detailed as well.
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59.发明申请公开(公告)号：US20190171856A1
公开(公告)日：2019-06-06
申请号：US16002989
申请日：2018-06-07
Applicant: Digimarc Corporation
Inventor： Ravi K. Sharma , Tomas Denemark , Brett A. Bradley , Geoffrey B. Rhoads , Eoin C. Sinclair , Vojtech Holub , Hugh L. Brunk , Trent J. Brundage , John F. Stach , John D. Lord , Joel R. Meyer
Abstract: The parameters of an optical code are optimized to achieve improved signal robustness, reliability, capacity and/or visual quality. An optimization program can determine spatial density, dot distance, dot size and signal component priority to optimize robustness. An optical code generator employs these parameters to produce an optical code at the desired spatial density and robustness. The optical code is merged into a host image, such as imagery, text and graphics of a package or label, or it may be printed by itself, e.g., on an otherwise blank label or carton. A great number of other features and arrangements are also detailed.
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公开(公告)号：US20190139176A1
公开(公告)日：2019-05-09
申请号：US16129487
申请日：2018-09-12
Applicant: Digimarc Corporation
Inventor： John F. Stach , Ravi K. Sharma , Christopher A. Ambiel , Ajith M. Kamath
Abstract: Artwork carrying machine readable data is generated by editing artwork according to a data signal or transforming the data signal into artwork. The machine-readable data signal is generated from a digital payload and converted into an image tile. Artwork is edited according to the image tile by moving graphic elements, adapting intersections of lines, or altering line density, among other techniques. Artwork is generated from the data signal by skeletonizing it and applying morphological operators to a skeletal representation, such as a medial axis transform. Artistic effects are introduced by filtering the data signal with directional blurring or shape filters.
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