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

IPC: G06T1/00 ,  G06T3/00 ,  G06T3/02 ,  G06T3/10

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.

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

IPC: G06T1/00 ,  G06T3/00 ,  G06K9/62

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.

公开(公告)号：US09922389B2

公开(公告)日：2018-03-20

申请号：US14735921

申请日：2015-06-10

Applicant: Sam Houston State University

Inventor： Qingzhong Liu

IPC: G06K9/00 ,  G06K9/46 ,  G06K9/40 ,  G06T1/00

CPC classification number: G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0081 ,  G06T2201/0201

Abstract: A method of detecting tampering in a compressed digital image includes extracting one or more neighboring joint density features from a digital image under scrutiny and extracting one or more neighboring joint density features from an original digital image. The digital image under scrutiny and the original digital image are decompressed into a spatial domain. Tampering in the digital image under scrutiny is detected based on at least one difference in a neighboring joint density feature of the digital image under scrutiny and a neighboring joint density feature of the original image. In some embodiments, detecting tampering in the digital image under scrutiny includes detecting down-recompression of at least a portion of the digital image. In some embodiments, detecting tampering in the digital image includes detecting inpainting forgery in the same quantization.

公开(公告)号：US20170334234A1

公开(公告)日：2017-11-23

申请号：US15598915

申请日：2017-05-18

Applicant: Atlanta DTH, Inc.

Inventor： John W. CURTIS

IPC: B42D25/333 ,  G06T1/00 ,  H04N21/8358 ,  H04N21/4627 ,  H04N1/32

CPC classification number: B42D25/333 ,  G06T1/0028 ,  G06T1/0071 ,  G06T2201/005 ,  G06T2201/0064 ,  G06T2201/0081 ,  H04N1/32203 ,  H04N21/4627 ,  H04N21/8358 ,  H04N2201/3233

Abstract: A system and method is provided for management of digital watermarks, including a system and method for identifying the source of counterfeit copies of multimedia works using layered simple digital watermarks which are difficult to locate, identify and circumvent. The layered digital watermarks may be modulated in a variety of ways, and may be individualized to assist in detection of unlawful copyrighted material infringement by endpoint device and/or the user committing the copyright infringement. In addition, multiple layers of watermarks may be selected and applied by various schemes, such as on-the-fly remotely by the distributor of the copyrighted material. This system and method for management of digital watermarks effectively makes it impossible for a potential copyright infringer to have complete confidence that they located and disabled all of the watermarks in the copyrighted material, and therefore substantially increases the risk of infringer identification and prosecution for copyright violations.

公开(公告)号：US09712714B2

公开(公告)日：2017-07-18

申请号：US14266542

申请日：2014-04-30

Applicant: Wal-Mart Stores, Inc.

Inventor： Stuart Argue ,  Anthony Emile Marcar

IPC: G06K9/00 ,  H04N1/32 ,  H04W4/00 ,  G06T1/00 ,  G06K7/14 ,  G06Q30/04

CPC classification number: H04N1/32 ,  G06K7/1413 ,  G06Q30/04 ,  G06T1/005 ,  G06T2201/0062 ,  G06T2201/0081 ,  H04N1/32144 ,  H04N1/3232 ,  H04N2201/3233 ,  H04N2201/3269 ,  H04W4/80

Abstract: A computer-implemented process can be operated to create a watermarked copy of a unique original copy of an electronic sales receipt in a first computerized device to a second computerized device. The watermarked copy includes an electronic watermark identifying the copy. The process includes creating the watermarked copy of the electronic sales receipt by copying information from the original copy of the electronic sales receipt to the watermarked copy and providing the electronic watermark within the watermarked copy.

公开(公告)号：US20150242983A1

公开(公告)日：2015-08-27

申请号：US14188103

申请日：2014-02-24

Applicant: DISNEY ENTERPRISES, INC.

Inventor： Joseph DiGIOVANNI

IPC: G06T1/00 ,  G09G5/377

CPC classification number: G06T1/0021 ,  G06T1/005 ,  G06T2201/0065 ,  G06T2201/0081 ,  G09G5/377 ,  G09G2340/125 ,  H04N21/4307 ,  H04N21/44008 ,  H04N21/8358

Abstract: Systems and methods for synchronizing a broadcast video with contextual data are disclosed, wherein the broadcast video is enhanced by graphical overlays. Synchronization is achieved by means of digital watermarking of the broadcast video in conjunction with the graphical-overlays. Exemplary embodiments embed a watermark bitstream into the broadcast video based on an overlay-template, characteristic of a corresponding overlay-graphic. The watermarked video is then transmitted over a communication link to a receiving-end including a detector. According to some embodiment, the embedder inserts the watermark bitstream into the overlay-graphics' regions of the video and the detector extracts the watermark bitstream based on information in the overlay-template and based on a restored version of the original overlay-graphics.

Abstract translation: 公开了用于使广播视频与上下文数据同步的系统和方法，其中通过图形叠加来增强广播视频。 通过与图形叠加结合的广播视频的数字水印来实现同步。 示例性实施例基于覆盖模板，相应重叠图形的特征​​将水印比特流嵌入到广播视频中。 然后，经水印的视频通过通信链路发送到包括检测器的接收端。 根据一些实施例，嵌入器将水印比特流插入到视频的覆盖图形区域中，并且检测器基于覆盖模板中的信息并基于原始叠加图形的恢复版本来提取水印比特流。

公开(公告)号：US20140270330A1

公开(公告)日：2014-09-18

申请号：US13837415

申请日：2013-03-15

Applicant: Sergey POMETUN ,  Dmitriy DOROGOVTSEV ,  Maksym KOSHEL ,  Nikolay POLYANOVSKIY ,  Svitlana VOLKOVA

Inventor： Sergey POMETUN ,  Dmitriy DOROGOVTSEV ,  Maksym KOSHEL ,  Nikolay POLYANOVSKIY ,  Svitlana VOLKOVA

IPC: G06T1/00

CPC classification number: G06T1/0057 ,  G06T2201/0053 ,  G06T2201/0061 ,  G06T2201/0081

Abstract: A method of embedding a watermark in video data includes generating a watermark to be embedded in the video data, generating a bit string based on a generated watermark, and embedding a watermark in the video data by changing a quantization parameter of the video data by a predetermined value based on the bit string.

Abstract translation: 一种在视频数据中嵌入水印的方法包括：生成要嵌入在视频数据中的水印，基于生成的水印产生位串，并通过将视频数据的量化参数改变为视频数据的量化参数，将视频数据嵌入水印 基于位串的预定值。

公开(公告)号：US08189856B2

公开(公告)日：2012-05-29

申请号：US12012669

申请日：2008-02-05

Applicant: Chattopadhyay Tanushyam Sibnath ,  Pal Arpan Dipak Kumar

Inventor： Chattopadhyay Tanushyam Sibnath ,  Pal Arpan Dipak Kumar

IPC: G06K9/00

CPC classification number: G06T1/0028 ,  G06T2201/0081 ,  G06T2201/0202

Abstract: A system and apparatus for evaluating the reliability of a watermarking technique for a video sequence, said system and apparatus comprising: a) a calibrating means adapted to calibrate said system and apparatus using a test original video sequence and a test attacked video sequence in compliance with predetermined degrees of quality; b) an attacking means adapted to attack embedded watermark in said video sequence, said attack selected from a group of attacks; and c) an evaluating means including a comparator means for comparing the test original video sequence with test attacked video sequence and the watermark in the test original video sequence with the watermark in the test attacked video sequence to evaluate the reliability of a watermarking technique to give a reliability score.

Abstract translation: 一种用于评估视频序列的水印技术的可靠性的系统和装置，所述系统和装置包括：a）校准装置，其适于使用测试原始视频序列和测试攻击的视频序列校准所述系统和装置， 预定质量; b）适用于攻击所述视频序列中的嵌入水印的攻击手段，所述攻击是从一组攻击中选出的; 以及c）评估装置，包括比较装置，用于将测试原始视频序列与被测试的视频序列和测试原始视频序列中的水印与测试攻击的视频序列中的水印进行比较，以评估水印技术的可靠性，以给出 可靠性分数。

公开(公告)号：US20120051642A1

公开(公告)日：2012-03-01

申请号：US13263591

申请日：2010-04-08

Applicant: Sid Ahmed Berrani ,  Nicolas Gengembre

Inventor： Sid Ahmed Berrani ,  Nicolas Gengembre

IPC: G06K9/34

CPC classification number: G06T1/0028 ,  G06T1/005 ,  G06T2201/0065 ,  G06T2201/0081

Abstract: A method and apparatus are provided for determining a descriptor for a region of interest in an image. The method includes: defining a grid of points for the region of interest; associating a respective zone of influence with each point of the grid of points; determining a representative value for each point of the grid of points as a function of its respective zone of influence; and comparing the representative value obtained for each point of the grid of points with at least one reference value. The result of the comparison serves to define a descriptor for the region of interest.

Abstract translation: 提供了一种用于确定图像中感兴趣区域的描述符的方法和装置。 该方法包括：为感兴趣区域定义一个点的网格; 将各个影响区域与点网格的每个点相关联; 根据其各自的影响区域确定点网格中每个点的代表值; 以及将获得的每个点的网格点的代表值与至少一个参考值进行比较。 比较的结果用于定义感兴趣区域的描述符。

公开(公告)号：US20110276663A1

公开(公告)日：2011-11-10

申请号：US13187839

申请日：2011-07-21

Applicant: Geoffrey B. Rhoads

Inventor： Geoffrey B. Rhoads

IPC: G06F15/16

CPC classification number: H04L67/02 ,  B42D25/00 ,  B42D25/328 ,  G06F17/30876 ,  G06K7/1417 ,  G06K7/1447 ,  G06K19/06037 ,  G06K19/06046 ,  G06K19/14 ,  G06K19/18 ,  G06K2017/0064 ,  G06K2019/06253 ,  G06Q20/341 ,  G06Q20/40145 ,  G06T1/005 ,  G06T1/0064 ,  G06T2201/0065 ,  G06T2201/0081 ,  G07C9/00079 ,  G07D7/0034 ,  G07D7/004 ,  G07F7/086 ,  G07F7/1008 ,  G07F17/16 ,  G07F17/26 ,  G11B20/00086 ,  G11B20/00884 ,  G11B20/00891 ,  H04N1/00846 ,  H04N1/32122 ,  H04N1/32144 ,  H04N1/3216 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32251 ,  H04N1/32288 ,  H04N1/32352 ,  H04N2201/3225 ,  H04N2201/3226 ,  H04N2201/3233 ,  H04N2201/3249 ,  H04N2201/327 ,  H04N2201/3271 ,  H04N2201/3274

Abstract: A method includes receiving, at a first device, data representing a graphic. The graphic includes non-uniformly toned regions with information steganographically encoded therein. The steganographically encoded information is decoded from the received data. The method also includes communicating with a second device and receiving data from the second device. An aspect of operation of the first device is controlled in accordance with the data received from the second device. The data received from the second device is a function of the decoded information.

Abstract translation: 一种方法包括在第一设备处接收表示图形的数据。 该图形包括在其中被隐写编码的信息的非均匀调色区域。 从接收的数据解码隐写编码信息。 该方法还包括与第二设备通信并从第二设备接收数据。 根据从第二设备接收的数据来控制第一设备的操作的一个方面。 从第二设备接收的数据是解码信息的函数。