公开(公告)号：US20230262257A1

公开(公告)日：2023-08-17

申请号：US17653355

申请日：2022-03-03

申请人： SHANDONG UNIVERSITY

发明人： Hui YUAN ,  Tingting WANG ,  Tian GUO ,  Shuai LI

IPC分类号： H04N19/54 ,  G06T17/00 ,  G06F17/16

CPC分类号： H04N19/54 ,  G06T17/00 ,  G06F17/16

摘要： A motion estimation method and a system in inter-frame prediction coding of 3D point cloud data: first, isometric sub-sampling is performed for points in pc_likely_world, then, the sampled points were divided into uniform small cubes, and the centroid of point cloud location information in each small cube was calculated, and the points closest to the centroid were found, and these points were put into pc_world_target. Finally, the corresponding point pc_world_ref is found in the reference frame, and the LMS algorithm is used to calculate the global motion matrix; by reserving the centroid points in each block, the method not only effectively removes the redundant points to reduce the computational complexity of the global motion matrix but also preserves the points that represent the characteristics of the point cloud to ensure the computational accuracy of the global motion matrix.

公开(公告)号：US11671612B2

公开(公告)日：2023-06-06

申请号：US17494486

申请日：2021-10-05

申请人： Tencent America LLC

发明人： Guichun Li ,  Xiang Li ,  Xiaozhong Xu ,  Shan Liu

IPC分类号： H04N19/44 ,  H04N19/137 ,  H04N19/46 ,  H04N19/176 ,  H04N19/105 ,  H04N19/159 ,  H04N19/186 ,  H04N19/132 ,  H04N19/513 ,  H04N19/51 ,  H04N19/109 ,  H04N19/91 ,  H04N19/54 ,  H04N19/52

CPC分类号： H04N19/44 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/54 ,  H04N19/91

摘要： A method for video encoding includes encoding prediction information of a current block in a current picture into a coded video bitstream, the prediction information being indicative of a symmetric motion vector difference (SMVD) mode for bi-prediction from a pair of forward and backward reference pictures. The method further includes, when searching for the pair of the forward and backward reference pictures, skipping a reference picture associated with a weighted prediction without checking a picture order count (POC) of the reference picture. The method also includes determining a first reference block for the current block in the forward reference picture and a second reference block for the current block in the backward reference picture, and reconstructing the current block according to the first reference block and the second reference block.

公开(公告)号：US20180249189A1

公开(公告)日：2018-08-30

申请号：US15892405

申请日：2018-02-08

申请人： NextVR Inc.

发明人： David Cole ,  Alan McKay Moss

IPC分类号： H04N21/218 ,  H04N7/18 ,  G06T17/20 ,  H04N19/54 ,  G06T15/06 ,  G03B37/04 ,  G03B35/08

CPC分类号： H04N21/21805 ,  G03B35/08 ,  G03B37/04 ,  G06T15/06 ,  G06T17/20 ,  H04N7/181 ,  H04N19/54 ,  H04N19/597 ,  H04N21/2143 ,  H04N21/251 ,  H04N21/472 ,  H04N21/816

摘要： Supporting camera switching while reducing the effect on the user in terms of sudden changes in view are described. Production side switching between cameras is supported and in some cases policed to try and ensure that a user will be able to see the same area of interest, e.g., ball, after a switch in cameras as the user was viewing before the switch. In some embodiments the playback device takes into consideration what location on a 3D model of the environment the user was viewing at the time of the switch and attempts to maintain the user's view during the switch so that the user will be viewing the same portion of the environment, e.g., object, before and after a switch. The user still experiences a change in viewing position in the environment due to the camera switch but with less disorientation than otherwise might be the case.

公开(公告)号：US09959600B2

公开(公告)日：2018-05-01

申请号：US15511938

申请日：2015-10-09

申请人： BOE Technology Group Co., Ltd.

发明人： Hong Wang ,  Chengqi Zhou

IPC分类号： G06K9/00 ,  G06T5/00 ,  G06T7/246 ,  G06T7/11 ,  G06T7/13 ,  G06T3/00 ,  G06K9/62 ,  G06T7/223

CPC分类号： G06T5/003 ,  G06K9/6202 ,  G06T3/0006 ,  G06T7/11 ,  G06T7/13 ,  G06T7/223 ,  G06T7/248 ,  G06T2207/20021 ,  G06T2207/20056 ,  G06T2207/20201 ,  H04N19/54 ,  H04N19/577 ,  H04N19/587

摘要： Disclosed are a motion image compensation method and a device, and a display device. The motion image compensation method comprises: acquiring a first image corresponding to a pre-motion picture and a second image corresponding to a post-motion picture; dividing the first image and the second image respectively into several image blocks; performing computations on any pair of mutually corresponding image blocks in the first image and the second image based on a phase correlation method; performing edge detection on the first image and the second image respectively; and according to a preset condition, acquiring, from the at least one displacement vector, a displacement vector matched with a transformation between the edge feature patterns within the pair of mutually corresponding image blocks as a displacement vector corresponding to the pair of image blocks during a motion compensation process.

公开(公告)号：US20180115785A1

公开(公告)日：2018-04-26

申请号：US15336276

申请日：2016-10-27

申请人： Flux Planet, Inc.

发明人： Sang Yup LEE

IPC分类号： H04N19/587 ,  H04L29/06 ,  H04N19/54 ,  H04N19/172 ,  H04N19/146

CPC分类号： H04N19/587 ,  H04L65/4069 ,  H04L65/4084 ,  H04L65/602 ,  H04L65/605 ,  H04L65/607 ,  H04L65/80 ,  H04N19/146 ,  H04N19/172 ,  H04N19/54 ,  H04N21/234381 ,  H04N21/2402 ,  H04N21/44 ,  H04N21/64792

摘要： A content streaming system includes: an encoding unit generating frame-by-frame mesh data and motion data, converting the mesh data into a geometry image, encoding the geometry image with tagged motion data, and generating first streaming data; a traffic control unit selecting a drop frame dropping the geometry image based on a network bandwidth, dropping the geometry image of the drop frame from the first streaming data, and generating second streaming data; and a decoding unit decoding the second streaming data, converting a geometry image of the decoded second streaming data into mesh data, and interpolating and generating mesh data of the drop frame.

公开(公告)号：US20180054628A1

公开(公告)日：2018-02-22

申请号：US15026928

申请日：2016-02-17

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

发明人： Martin PETTERSSON ,  Kenneth ANDERSSON ,  Per WENNERSTEN

IPC分类号： H04N19/53 ,  H04N19/54 ,  H04N19/567 ,  H04N19/577 ,  H04N19/172 ,  H04N19/182

CPC分类号： H04N19/53 ,  H04N19/105 ,  H04N19/117 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/46 ,  H04N19/54 ,  H04N19/567 ,  H04N19/577 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  H04N19/85

摘要： A method is disclosed performed in an encoder for encoding video pictures into a video bit stream, the method comprising: obtaining a denoised version of a reference picture; performing a matching procedure at least once, the matching procedure comprising matching a reference matching area of the reference picture to a matching area of a second picture and matching a reference matching area of the denoised version to the matching area of the second picture, and encoding a block of a current picture by selecting, for the block, a first prediction area based on a first reference area of the reference picture or a second prediction area based on a second reference area of the denoised version, wherein the prediction area having lowest matching error to the corresponding matching area of the second picture is selected. A corresponding method in a decoder is disclosed, and encoder, decoder, computer programs and computer program products.

公开(公告)号：US09860553B2

公开(公告)日：2018-01-02

申请号：US14661406

申请日：2015-03-18

申请人： Intel Corporation

发明人： Dmitri Bitouk ,  Artem Zinevich

IPC分类号： G06K9/00 ,  H04N19/527 ,  G06K9/62 ,  H04N5/14 ,  H04N19/139 ,  H04N19/119 ,  H04N19/167 ,  H04N19/54 ,  G06T7/246

CPC分类号： H04N19/527 ,  G06K9/00624 ,  G06K9/00765 ,  G06K9/6201 ,  G06K9/6211 ,  G06K9/6218 ,  G06K9/6284 ,  G06T7/246 ,  G06T2207/20164 ,  H04N5/144 ,  H04N19/119 ,  H04N19/139 ,  H04N19/167 ,  H04N19/17 ,  H04N19/54

摘要： Techniques related to detecting local change in video are discussed. Such techniques may include determining inlier and outlier keypoints for a current frame of a video sequence based on inlier keypoints from previous frames, detecting a region of local change based on outlier keypoints of the current and previous frames, and providing an indicator of local change based on the detected region of local change.

公开(公告)号：US09813616B2

公开(公告)日：2017-11-07

申请号：US14933871

申请日：2015-11-05

申请人： FotoNation Cayman Limited

发明人： Dan Lelescu ,  Ankit K. Jain

IPC分类号： H04N5/232 ,  G06T3/40 ,  H04N19/53 ,  H04N19/54 ,  H04N19/59 ,  G06K9/46 ,  G06K9/62 ,  G06T11/60 ,  G06T7/13 ,  G06T7/246

CPC分类号： H04N5/23232 ,  G06K9/4604 ,  G06K9/6201 ,  G06T3/4053 ,  G06T3/4069 ,  G06T7/13 ,  G06T7/246 ,  G06T11/60 ,  G06T2207/20221 ,  H04N19/53 ,  H04N19/54 ,  H04N19/59

摘要： Systems and methods in accordance with embodiments of the invention enable feature based high resolution motion estimation from low resolution images captured using an array camera. One embodiment includes performing feature detection with respect to a sequence of low resolution images to identify initial locations for a plurality of detected features in the sequence of low resolution images, where the at least one sequence of low resolution images is part of a set of sequences of low resolution images captured from different perspectives. The method also includes synthesizing high resolution image portions, where the synthesized high resolution image portions contain the identified plurality of detected features from the sequence of low resolution images. The method further including performing feature detection within the high resolution image portions to identify high precision locations for the detected features, and estimating camera motion using the high precision locations for said plurality of detected features.

公开(公告)号：US20170272761A1

公开(公告)日：2017-09-21

申请号：US15458391

申请日：2017-03-14

申请人： FUJITSU LIMITED

发明人： Takahiro KOBAYAKAWA ,  YASUO MISUDA

IPC分类号： H04N19/167 ,  H04N19/543 ,  H04N19/54 ,  G06T7/11 ,  H04N19/527

CPC分类号： H04N19/167 ,  G06T7/11 ,  H04N19/119 ,  H04N19/137 ,  H04N19/176 ,  H04N19/527 ,  H04N19/54 ,  H04N19/543

摘要： A non-transitory computer-readable storage medium storing an encoding processing program that causes a computer to execute a process, the process including acquiring image feature information of each of a plurality of image regions obtained by partitioning first image data and image feature information of each of the plurality of image regions obtained by partitioning second image data, determining, for each of the plurality of image regions, whether image feature information of the first image data and image feature information of the second image data have a correlation greater than or equal to a certain value, and coding a specified image region of the second image data which has the correlation, the coding being performed by using coding unit used for coding of an image region of the first image data whose position corresponds to the specified image region of the second image data.

公开(公告)号：US20170214936A1

公开(公告)日：2017-07-27

申请号：US15004434

申请日：2016-01-22

申请人： Mitsubishi Electric Research Laboratories, Inc.

发明人： Dong Tian ,  Huifang Sun ,  Anthony Vetro

IPC分类号： H04N19/54 ,  H04N19/593 ,  H04N19/527

CPC分类号： H04N19/54 ,  G06K9/00751 ,  H04N19/23 ,  H04N19/46 ,  H04N19/52 ,  H04N19/527 ,  H04N19/543 ,  H04N19/58 ,  H04N19/593

摘要： A method processes keypoint trajectories in a video, wherein the keypoint trajectories describe motion of a plurality of keypoints across pictures of the video over time, by first acquiring the video of a scene using a camera. Kkeypoints and associated feature descriptors are detected in each picture. The keypoints and associated features descriptors are matched between neighboring pictures to generate keypoint trajectories. Then, the keypoint trajectories are coded predictively into a bitstream, which is outputted.