公开(公告)号：US20190279328A1

公开(公告)日：2019-09-12

申请号：US16242805

申请日：2019-01-08

Applicant: Digimarc Corporation

Inventor： Alastair M. Reed ,  Ravi K. Sharma

IPC: G06T1/00 ,  G06K9/00

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.

公开(公告)号：US10192560B2

公开(公告)日：2019-01-29

申请号：US15714642

申请日：2017-09-25

Applicant: Digimarc Corporation

Inventor： Ravi K. Sharma ,  Adnan M. Alattar

IPC: G10L19/018 ,  G10L19/12 ,  G10L15/08 ,  G10L21/055 ,  G10L19/00 ,  G10L19/022 ,  G10L19/26

Abstract: Spectral encoding methods are more robust when used with improved weak signal detection and synchronizations methods. Further robustness gains are achieved by using informed embedding, error correction and embedding protocols that enable signal to noise enhancements by folding and pre-filtering the received signal.

公开(公告)号：US20180349491A1

公开(公告)日：2018-12-06

申请号：US15836692

申请日：2017-12-08

Applicant: Digimarc Corporation

Inventor： Ravi K. Sharma ,  Tony F. Rodriguez

IPC: G06F17/30 ,  G10L25/21 ,  G06K9/00 ,  H04M1/02

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 portable computing device including: memory for storing a library of processing components, the library including a signal detector component and an audio fingerprinting component; a microphone for capturing ambient audio; one or more processors configured for: invoking the audio fingerprinting component for processing captured audio to produce an audio fingerprint, wherein the audio fingerprinting component comprises a filtering process, in which the filtering process produces components of the captured audio that are used to produce the audio fingerprint; and invoking the signal detector component, in which the signal detector component comprises a fast detect process for analyzing the captured audio to determine the presence of an auxiliary signal within the captured audio, and when the presence of the auxiliary signal is detected, controlling the signal detector component for detecting the auxiliary signal to yield a detected auxiliary signal. The device further includes a communications output for communicating the audio fingerprint and the detected auxiliary signal to a remotely located server. Of course, other claims and combinations are provided as well.

公开(公告)号：US20180338068A1

公开(公告)日：2018-11-22

申请号：US15823138

申请日：2017-11-27

Applicant: Digimarc Corporation

Inventor： Matthew M. Weaver ,  Ravi K. Sharma

IPC: H04N5/225 ,  G09C5/00 ,  H04N21/44 ,  H04N21/2389 ,  G06F21/16 ,  H04N21/8358

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.

公开(公告)号：US20180308193A1

公开(公告)日：2018-10-25

申请号：US15959992

申请日：2018-04-23

Applicant: Digimarc Corporation

Inventor： Ravi K. Sharma ,  John D. Lord ,  Robert G. Lyons

IPC: G06T1/00 ,  G06T3/00 ,  G06F1/02 ,  G06K9/62

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.

公开(公告)号：US09990565B2

公开(公告)日：2018-06-05

申请号：US15332262

申请日：2016-10-24

Applicant: Digimarc Corporation

Inventor： Geoffrey B. Rhoads ,  Yang Bai ,  Tony F. Rodriguez ,  Eliot Rogers ,  Ravi K. Sharma ,  John D. Lord ,  Scott Long ,  Brian T. MacIntosh ,  Kurt M. Eaton

IPC: G06K9/00 ,  G06K9/62 ,  G06T15/20 ,  H04N7/18 ,  G06F17/30

CPC classification number: G06K9/6215 ,  G06F17/30247 ,  G06F17/30256 ,  G06F17/30268 ,  G06K9/00 ,  G06K9/00208 ,  G06K9/4671 ,  G06K9/6202 ,  G06K9/6255 ,  G06T15/02 ,  G06T15/20 ,  G06T17/00 ,  H04N7/185

Abstract: Methods and arrangements involving portable user devices such smartphones and wearable electronic devices are disclosed, as well as other devices and sensors distributed within an ambient environment. Some arrangements enable a user to perform an object recognition process in a computationally- and time-efficient manner. Other arrangements enable users and other entities to, either individually or cooperatively, register or enroll physical objects into one or more object registries on which an object recognition process can be performed. Still other arrangements enable users and other entities to, either individually or cooperatively, associate registered or enrolled objects with one or more items of metadata. A great variety of other features and arrangements are also detailed.

公开(公告)号：US20180126769A1

公开(公告)日：2018-05-10

申请号：US15650447

申请日：2017-07-14

Applicant: Digimarc Corporation

Inventor： Tony F. Rodriguez ,  Geoffrey B. Rhoads ,  Ravi K. Sharma

IPC: B42D25/333 ,  B41M3/10 ,  G07D7/12 ,  G07D7/20 ,  G06K9/46 ,  G06T1/00 ,  B42D25/00 ,  B42D25/328 ,  G06K9/22 ,  B42D25/23

Abstract: The application discloses apparatus and systems for authenticating physical object, identification documents and security documents. Some such methods and apparatus involve signal encoding or digital watermarking.

公开(公告)号：US20180005341A1

公开(公告)日：2018-01-04

申请号：US15605904

申请日：2017-05-25

Applicant: Digimarc Corporation

Inventor： Alastair M. Reed ,  Ravi K. Sharma

IPC: G06T1/00 ,  H04N1/32

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 signal encoding and decoding. One claim recites a method comprising: obtaining color image data or color video data, the color image data or color video data comprising an encoded signal pattern, the encoded signal pattern aiding detection of an encoded message, the pattern comprising first frequency components and second frequency components, the color image data or color video data comprising first color data and second color data, in which the first color data comprises the first frequency components encoded therein, and the second color data comprises the second frequency components encoded therein; combining the first color data and the second color data, said combining yielding combined color data; utilizing one or more processors or electronic processing circuitry, detecting the encoded signal pattern from the combined color data, said detecting yielding rotation and scale information; and using the rotation and scale information to detect the encoded message from the combined color data. Of course, other combinations and claims are provided too.

公开(公告)号：US20170230533A1

公开(公告)日：2017-08-10

申请号：US15497042

申请日：2017-04-25

Applicant: Digimarc Corporation

Inventor： Vojtech Holub ,  Donald Haaga ,  Ravi K. Sharma

IPC: H04N1/32

CPC classification number: H04N1/32229 ,  G06T1/0028 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0065 ,  G06T2201/0202 ,  H04N1/32 ,  H04N1/32187 ,  H04N1/32224 ,  H04N1/32251 ,  H04N1/32261 ,  H04N1/3232 ,  H04N1/32352 ,  H04N19/124 ,  H04N19/467 ,  H04N2201/3233

Abstract: Sparse signal modulation schemes encode a data channel on a substrate in a manner that is robust, flexible to achieve perceptual quality constraints, and provides improved data capacity. The substrate is printed by any of a variety of means to apply the image, with sparse signal, to an object. After image capture of the object, a decoder processes the captured image to detect and extract data modulated into the sparse signal. The sparse signal may incorporate implicit or explicit synchronization components, which are either formed from the data signal or are complementary to it.

公开(公告)号：US09652821B2

公开(公告)日：2017-05-16

申请号：US14301293

申请日：2014-06-10

Applicant: Digimarc Corporation

Inventor： Ravi K. Sharma ,  John D. Lord

IPC: G06K9/36 ,  G06T3/00 ,  G06T1/00 ,  G06K9/62 ,  G06K9/52

CPC classification number: G06T3/0056 ,  G06K9/522 ,  G06K9/6206 ,  G06T1/0021 ,  G06T1/0064 ,  G06T2201/0065

Abstract: A phase deviation method determines an offset between a reference and suspect signal by analyzing a phase deviation surface created by computing a deviation metric for phase shift and then analyzing a surface formed from the deviation metrics for an array of offsets. The phase deviation method analyzes the deviation surface to determine an offset that minimizes phase deviation. This method is applied at increasing levels of detail to refine the determination of the offset.