Patents by Inventor Xiang Zhang

Xiang Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • IMPLICIT GEOMETRY PARTITION FOR POINT CLOUD CODING
    Publication number: 20230345046
    Abstract: In a method for point cloud processing, a bitstream corresponding to a sequence of coded point cloud frames is received. Whether an implicit geometry partition is enabled for the sequence of coded point cloud frames is determined. An octree representing a geometry of points in a bounding box in a coded point cloud frame in the sequence of coded point cloud frames is reconstructed based on whether the implicit geometry partition is determined to be enabled for the sequence of coded point cloud frames.
    Type: Application
    Filed: June 23, 2023
    Publication date: October 26, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Xiang ZHANG, Wen GAO, Sehoon YEA, Shan LIU
  • CHART BASED MESH COMPRESSION
    Publication number: 20230334712
    Abstract: A method performed in a decoder includes receiving a coded video bitstream that includes one or more 2D meshes corresponding to a 3D mesh. The method includes reconstructing one or more boundary vertices of each of the one or more 2D meshes. The method includes determining whether a reconstruction mode for reconstructing one or more internal vertices of each of the one or more 2D meshes is one of (i) a sampling mode and a (ii) non-sampling mode. The method includes reconstructing the one or more internal vertices of each of the one or more 2D meshes based on the determined reconstruction mode. The method further includes reconstructing the 3D mesh based on the reconstructed one or more boundary vertices of each of the one or more 2D meshes and the reconstructed one or more internal vertices of each of the one or more 2D meshes.
    Type: Application
    Filed: March 28, 2023
    Publication date: October 19, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Xiang ZHANG, Chao HUANG, Xiaozhong XU, Jun TIAN, Shan LIU
  • CODING OF BOUNDARY UV2XYZ INDEX FOR MESH COMPRESSION
    Publication number: 20230334714
    Abstract: A method performed by at least one processor in a decoder includes receiving a coded video bitstream that includes a compressed two dimensional (2D) mesh corresponding to a surface of three dimensional (3D) volumetric object. The method further includes predicting a current vertex included in the compressed 2D mesh based on an interpolation-based hierarchical prediction scheme that uses at least one sampled vertex included in the compressed 2D mesh. The method further includes deriving a prediction residual associated with the predicted current vertex. The method further includes reconstructing a boundary vertex associated with the 3D volumetric object based on the predicted current vertex and the derived prediction residual.
    Type: Application
    Filed: March 28, 2023
    Publication date: October 19, 2023
    Applicant: Tencent America LLC
    Inventors: Xiang ZHANG, Xiaozhong Xu, Chao Huang, Jun Tian, Shan Liu
  • ON CODING OF BOUNDARY UV2XYZ INDEX FOR MESH COMPRESSION
    Publication number: 20230334713
    Abstract: A method performed in a decoder includes receiving a coded video bitstream that includes (i) one or more two dimensional (2D) meshes corresponding to a three dimensional (3D) mesh and (ii) a 2D to 3D index array that maps each vertex in the one or more 2D meshes to a respective vertex in the 3D mesh. The method further includes reconstructing the 3D mesh using the 2D to 3D index array to map each vertex in the one or more 2D meshes to the respective vertex in the 3D mesh. The 2D to 3D index array encoded in a tuple format in which each tuple in the 2D to 3D index array includes a first parameter that specifies a starting index of a run, a second parameter that specifies a length of the run, and a third parameter that specifies a direction of the run.
    Type: Application
    Filed: March 28, 2023
    Publication date: October 19, 2023
    Applicant: Tencent America LLC
    Inventors: Xiang Zhang, Xiaozhong Xu, Chao Huang, Jun Tian, Shan Liu
  • Attribute value of reconstructed position associated with plural original points
    Patent number: 11783512
    Abstract: Aspects of the disclosure provide methods and apparatuses for point cloud compression. In some examples, an apparatus for point cloud compression includes processing circuitry. The processing circuitry determines a plurality of original points in a point cloud that is quantized to a reconstructed position. The processing circuitry determines an attribute value of the reconstructed position based on attribute information of the plurality of original points. Further, the processing circuitry encodes the point cloud based on the determined attribute value of the reconstructed position.
    Type: Grant
    Filed: July 7, 2022
    Date of Patent: October 10, 2023
    Assignee: Tencent America LLC
    Inventors: Xiang Zhang, Wen Gao, Shan Liu
  • ATLAS SAMPLING BASED MESH COMPRESSION WITH CHARTS OF GENERAL TOPOLOGY
    Publication number: 20230316585
    Abstract: Method, apparatus, and system for atlas sampling-based dynamic mesh compression are provided. The process may include receiving a mesh frame with polygons representing a surface of an object; determining that the mesh frame is associated with an irregular UV chart in response to one or more singularity components in the mesh frame; performing boundary detection to the UV chart to identify one or more boundary loops in the UV chart; and compressing information of the identified one or more boundary loops into a bitstream.
    Type: Application
    Filed: March 14, 2023
    Publication date: October 5, 2023
    Inventors: Chao HUANG, Xiaozhong XU, Xiang ZHANG, Jun TIAN, Shan LIU
  • TRIANGULATION METHODS WITH BOUNDARY INFORMATION FOR DYNAMIC MESH COMPRESSION
    Publication number: 20230319293
    Abstract: A method and apparatus that receives a coded video bitstream from an encoder; retrieves, from the coded video bitstream, a mesh including a plurality of polygons that describe a surface of a volumetric object; triangulates one or more vertices of the mesh, the one or more vertices are located on a boundary of the mesh or interior of the mesh; infers connectivity information between the one or more vertices using the triangulation of the one or more vertices; and reconstructs one or more boundary UV coordinates based on the connectivity information.
    Type: Application
    Filed: March 16, 2023
    Publication date: October 5, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Xiang ZHANG, Chao Huang, Jun Tian, Xiaozhong Xu, Shan Liu
  • MESH PARAMETERIZATION WITH TEMPORALLY CORRELATED UV ATLASES
    Publication number: 20230306648
    Abstract: Method, apparatus, and system for generating temporally correlated UV atlases are provided. The process may include generating plurality of consistent UV charts based on partition information associated with one or more previous frames; removing one or more non-manifold vertices from the plurality of consistent UV charts based on assigning one or more incident faces associated with the one or more non-manifold vertices to corresponding UV charts; merging more than one of the plurality of consistent UV charts based on a similarity between the plurality of consistent UV charts and one or more reference charts associated with the one or more previous frames; and generating temporally correlated UV atlases for the current frame based on aligning the plurality of consistent UV charts with the one or more reference charts associated with the one or more previous frames.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 28, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Chao HUANG, Xiaozhong XU, Jun TIAN, Xiang ZHANG, Shan LIU
  • GEOMETRY FILTERING FOR MESH COMPRESSION
    Publication number: 20230306647
    Abstract: Method, apparatus, and system for geometry filtering for mesh compression are provided. The process may include receiving a coded bitstream associated with a mesh, wherein the coded bitstream comprises boundary information associated with the mesh, and determining one or more boundary vertices associated with the mesh based on the boundary information. The process may also include generating a filtered geometry map associated with the mesh based on the one or more boundary vertices associated with the mesh and one or more filtering parameters in a filtering algorithm; and compressing the filtered geometry map using a video codec into a plurality of single channel or multiple channel images.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 28, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Xiang ZHANG, Chao HUANG, Jun TIAN, Xiaozhong XU, Shan LIU
  • PARALLEL APPROACH TO DYNAMIC MESH ALIGNMENT
    Publication number: 20230306701
    Abstract: Method, apparatus, and system for parallel dynamic mesh alignment are provided. The process may include determining that a temporal alignment is present between one or more frames in a received input mesh including a plurality of polygons that describe a surface of a volumetric object, then, determining an intra-frame alignment scheme to spatially align charts within a frame. The process may also include applying the intra-frame alignment scheme to one or more corresponding charts in the one or more frames for inter-frame alignment; and processing the one or more frames in parallel based on the intra-frame alignment scheme and inter-frame alignment.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 28, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Chao HUANG, Xiaozhong XU, Xiang ZHANG, Jun TIAN, Shan LIU
  • Convolutional Approach to Fast and Compact Packing of 3D Mesh Into 2D Maps
    Publication number: 20230306645
    Abstract: This disclosure relates generally to coding and decoding of 3-dimensional (3D) mesh and specifically to fast and efficient packing of parts of a 3D mesh into a map in a 2-dimensional (2D) space. In one example, a 3D mesh frame is decomposed into charts. The charts are iteratively projected and packed into a 2D map to achieve improved compactness by using an image filtering technology. The image filtering technology may involve perform efficient convolution and correlation processing using fast Fourier transform.
    Type: Application
    Filed: October 27, 2022
    Publication date: September 28, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Jun TIAN, Chao HUANG, Xiaozhong XU, Xiang ZHANG, Shan LIU
  • PREDICTIVE CODING OF BOUNDARY UV2XYZ INDEX FOR MESH COMPRESSION
    Publication number: 20230306649
    Abstract: A method and apparatus that receives a coded video bitstream from an encoder; retrieves, from the coded video bitstream, a mesh including a plurality of polygons that describe one or more surfaces of a volumetric object; predicts a current value of an index of the UV-to-XYZ index array from at least one previously coded value included in another index in the UV-to-XYZ index array, wherein the UV-to-XYZ index array includes a plurality of indices which correspond each two-dimensional (2D) UV vertex associated with the mesh to a three-dimensional (3D) XYZ vertex associated with the mesh; derives a prediction residual associated with the current value of the index of the UV-to-XYZ index array; and reconstructs a boundary UV coordinate based on the predicted current value of the index of the UV-to-XYZ index array and the derived prediction residual.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 28, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Xiang ZHANG, Chao HUANG, Jun TIAN, Xiaozhon XU, Shan LIU
  • NODE-BASED GEOMETRY AND ATTRIBUTE CODING FOR A POINT CLOUD
    Publication number: 20230306651
    Abstract: A method and apparatus for coding information of a point cloud may be performed by at least one processor and comprises: obtaining the point cloud including a set of points in a three-dimensional space; partitioning the point cloud into a tree structure comprising a plurality of nodes at different depths; encoding geometry information of the nodes; and encoding attribute information of the nodes before the entire point cloud is partitioned.
    Type: Application
    Filed: June 2, 2023
    Publication date: September 28, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Wen GAO, Xiang ZHANG, Shan LIU
  • PREDICTIVE CODING OF BOUNDARY UV INFORMATION FOR MESH COMPRESSION
    Publication number: 20230308669
    Abstract: A method performed by at least one processor in a decoder includes receiving a coded video bitstream that includes a compressed two dimensional (2D) mesh corresponding to a surface of three dimensional (3D) volumetric object. The method includes predicting a sampled 2D coordinate from at least one previously coded sampled 2D coordinate included in the compressed mesh. The method includes deriving a prediction residual associated with the sampled 2D coordinate. The method further includes reconstructing a 2D coordinate corresponding to a boundary vertex based on the predicted sampled 2D coordinate and the derived prediction residual.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 28, 2023
    Applicant: TENCENT AMERICA LLC
    Inventors: Xiang ZHANG, Chao HUANG, Jun TIAN, Xiaozhong XU, Shan LIU
  • PREDICTIVE CODING OF BOUNDARY GEOMETRY INFORMATION FOR MESH COMPRESSION
    Publication number: 20230298216
    Abstract: This disclosure relates to methods and systems for for encoding or decoding a 3D mesh with predictive coding of boundary geometry information. The example decoding method includes receiving a coded bitstream comprising a geometry patch for a three-dimension mesh; extracting, from the coded bitstream, a reconstructed geometry image for the geometry patch comprising a set of points corresponding to a set of geometry coordinates for a boundary vertex in the three-dimension mesh; deriving based on the set of the geometry coordinates, a 3D geometry coordinate for the boundary vertex; obtaining a prediction residue for the boundary vertex; and reconstructing, by the device, geometry information of the boundary vertex based on the derived 3D geometry coordinate and the prediction residue.
    Type: Application
    Filed: October 26, 2022
    Publication date: September 21, 2023
    Applicant: Tencent America LLC
    Inventors: Xiang ZHANG, Xiaozhong XU, Jun TIAN, Chao HUANG, Shan LIU
  • Document applet generation
    Patent number: 11763076
    Abstract: A method for generating a document applet is provided. In the method, an editing interface including an editing region and a component list is displayed. The component list includes a plurality of predefined components. Each of the predefined components is configured to provide a document input template. At least one target component of the plurality of predefined components is added in the editing region. A page of the document applet is generated to include the document input template of each of the at least one target component in the editing region. The document applet is provided to a server. The document applet is configured to perform document processing via the page when downloaded to a user terminal.
    Type: Grant
    Filed: September 2, 2022
    Date of Patent: September 19, 2023
    Assignee: Tencent Technology (Shenzhen) Company Limited
    Inventors: Sen Li, Yuting Yang, Di Zhang, Yu Wang, Yin Qin, Xiang Zhang, Xianqing Yan
  • Display support arm mount
    Patent number: 11761573
    Abstract: Display assemblies for supporting displays on stands or support arms have mount portions to removably attach to the displays using magnetic assemblies and latches. The magnetic assemblies and latches can improve user experience and allow the display to be installed on a support arm from the viewing side of the display and without having to see or reach behind the display. Magnetic structures can center a mount portion of the support arm and a recess of the display and can attract them to each other. Laterally-extending latches can ensure the display is not inadvertently removed. Locking mechanisms can prevent the display from being rotated to a portrait orientation when sufficient space around the display and the necessary user intent is not provided.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: September 19, 2023
    Assignee: Apple Inc.
    Inventors: Kristopher P. Laurent, Bradley J. Hamel, Brett W. Degner, David H. Narajowski, Hao Zhu, Lauren M. Farrell, Sunita Venkatesh, Peter N. Jeziorek, Edward T. Sweet, David A. Jungquist, Karen Y. Cheng, Xiang Zhang, Danny L. McBroom, Michael D. McBroom, Laura M. DeForest
  • B7-H4 ANTIBODY DOSING REGIMENS
    Publication number: 20230287123
    Abstract: The present disclosure provides methods of administering antibodies and antigen-binding fragments thereof that specifically bind to human B7-H4 to a subject in need thereof, for example, a cancer patient.
    Type: Application
    Filed: September 27, 2022
    Publication date: September 14, 2023
    Inventors: Sandeep P. Inamdar, Helen L. Collins, Xiang Zhang, Hong Xiang
  • MESH COMPRESSION WITH CONSTRAINED GEOMETRY DYNAMIC RANGE
    Publication number: 20230281876
    Abstract: This disclosure relates to methods and systems for for encoding or decoding a 3D mesh with constrained geometry dynamic range. The example decoding method includes receiving a coded bitstream comprising a geometry patch for a three-dimension mesh; extracting, from the coded bitstream, a first syntax element indicating whether the geometry patch is partitioned, wherein the geometry patch comprises one or more partitions; and for a respective partition in the geometry patch, obtaining a dynamic range of pixel values for points in the respective partition that correspond to vertices in the three-dimension mesh, wherein the dynamic range enables the geometry patch to be coded within a predetermined bit depth.
    Type: Application
    Filed: October 26, 2022
    Publication date: September 7, 2023
    Applicant: Tencent America LLC
    Inventors: Xiang ZHANG, Xiaozhong XU, Jun TIAN, Chao HUANG, Shan LIU
  • STABLE PHARMACEUTICAL TOPICAL FORMULATION CONTAINING IMMUNOSUPPRESSANT FOR TREATING DERMATOLOGICAL CONDITION
    Publication number: 20230277537
    Abstract: A stable, yellowing-resistant topical formulation for the treatment of a dermatological condition includes a JAK inhibitor in an oil-in-water emulsion; white petrolatum in an amount of about 10% by wt.; less than about 0.7 ppm butyl hydroxytoluene (BHT) by wt.; oleyl alcohol in an amount of about 2% by wt.; and an antimicrobial agent.
    Type: Application
    Filed: July 12, 2021
    Publication date: September 7, 2023
    Applicant: PFIZER INC.
    Inventors: Raymond Ruzhong Chen, Amanda Patrice Surajhie Samuel, Todd Christopher Zelesky, Xiang Zhang