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公开(公告)号：US20180152688A1
公开(公告)日：2018-05-31
申请号：US15816094
申请日：2017-11-17
Applicant: SONY CORPORATION
Inventor： Danillo Graziosi
CPC classification number: H04N13/117 , G06T15/04 , H04N13/161 , H04N13/178 , H04N13/243 , H04N13/282 , H04N19/20 , H04N19/597 , H04N19/85
Abstract: A decoder-centric codec for free-viewpoint video streaming enables a more efficient and more accurate process of capturing, preprocessing, encoding, decoding and rendering of multi-layer free-viewpoint video.
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公开(公告)号：US12238272B2
公开(公告)日：2025-02-25
申请号：US17739484
申请日：2022-05-09
Applicant: SONY GROUP CORPORATION , Sony Corporation of America
Inventor： Alexandre Zaghetto , Ali Tabatabai , Danillo Graziosi
IPC: H04N19/103 , H04N19/119 , H04N19/147 , H04N19/176 , H04N19/42 , H04N19/597
Abstract: An electronic device and method for adaptive mode selection for point cloud compression, is provided. The electronic device receives a 3D point cloud geometry and partitions the 3D point cloud geometry into a set of 3D blocks. For a 3D block of the set of 3D blocks, mode decision information is determined. The mode decision information includes class information of the 3D point cloud geometry, operational conditions associated with an encoding stage of the 3D point cloud geometry, or mode-related information associated with one or more 3D blocks of the set of 3D blocks. Based on the mode decision information, one or more modes are selected for the 3D block from a plurality of modes. Each mode corresponds to a function that is used to encode the 3D block. The 3D block is encoded based on the one or more modes.
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公开(公告)号：US20240357163A1
公开(公告)日：2024-10-24
申请号：US18374848
申请日：2023-09-29
Applicant: SONY GROUP CORPORATION , Sony Corporation of America
Inventor： Alexandre Zaghetto , Danillo Graziosi , Ali Tabatabai
IPC: H04N19/597 , H04N19/159 , H04N19/172 , H04N19/186
CPC classification number: H04N19/597 , H04N19/159 , H04N19/172 , H04N19/186
Abstract: An attribute prediction and compensation scheme for geometry-based dynamic point cloud compression is described herein. A combination of multiple reference frames are able to be used as a predictor for current frames. The method described herein improves efficiency and accuracy.
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公开(公告)号：US20240177355A1
公开(公告)日：2024-05-30
申请号：US18394042
申请日：2023-12-22
Applicant: SONY GROUP CORPORATION , Sony Corporation of America
Inventor： Danillo Graziosi , Alexandre Zaghetto , Ali Tabatabai
Abstract: A new SEI message for the V-DMC standard is described herein, the zippering SEI. The zippering SEI message can be used by the decoder for the mesh reconstruction, where in the case of multiple sub-meshes, the zippering SEI provides ways to reduce common artifacts caused by independent sub-mesh encoding, such as holes and cracks on the mesh surface.
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公开(公告)号：US20230306684A1
公开(公告)日：2023-09-28
申请号：US17987846
申请日：2022-11-15
Applicant: SONY GROUP CORPORATION , Sony Corporation of America
Inventor： Danillo Graziosi , Alexandre Zaghetto , Ali Tabatabai
Abstract: An architecture includes new blocks that transform mesh connectivity to enable lossy compression. In addition, a method generates surface patches from meshes and preserves the overall aspect of the object, while generating patches for efficient encoding using the V3C standard. Triangles are joined together into connected components, and conditional projection of each triangle to the surface is performed to enforce connectivity at the projected surface. A new depth filtering algorithm is able to be used to improve compression performance. The new blocks added for connectivity compression and the techniques introduced to ensure 2D connectivity to allow for UV texture map transmission and to filter depth values and avoid highfrequency edges in the depth image are described herein.
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Patent Agency Ranking
公开(公告)号：US20230306683A1
公开(公告)日：2023-09-28
申请号：US17987836
申请日：2022-11-15
Applicant: SONY GROUP CORPORATION , Sony Corporation of America
Inventor： Danillo Graziosi , Alexandre Zaghetto , Ali Tabatabai
Abstract: Ways to post-process a decoded mesh and modify received triangles per patch to improve the mesh geometry are described herein. Since the transmitted geometry contains the high-resolution surface information, the information is able to be applied to the mesh reconstruction operation to generate triangles that are aligned with the original surface. Methods include generating new triangles by splitting the received triangles' edges according to their size, by inserting new vertices at the triangle's centroids, by splitting the vertices, and by performing marching cubes in surfaces defined by the geometry images.
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公开(公告)号：US20230306642A1
公开(公告)日：2023-09-28
申请号：US17987833
申请日：2022-11-15
Applicant: SONY GROUP CORPORATION , Sony Corporation of America
Inventor： Danillo Graziosi , Alexandre Zaghetto , Ali Tabatabai
IPC: G06T9/00
CPC classification number: G06T9/001
Abstract: The connectivity information and mapping information of a mesh surface patch are able to be encoded after projection to 2D. Regarding the connectivity information, the projection operation does not change the connection between vertices, so the same list of connected vertices are able to be carried in the atlas data. Similarly, the mapping information does not change after projection and is able to be carried in the atlas data. Two methods are disclosed for encoding the connectivity and mapping information. For the connectivity information, a video-based method uses neighboring color coding. For mapping coordinates, a method uses the projected vertex position. The connectivity and mapping are also able to be processed by an external mesh encoder. Newly proposed mapping information is able to be taken advantage of to perform temporal compression.
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38.发明授权公开(公告)号：US11461941B2
公开(公告)日：2022-10-04
申请号：US16850264
申请日：2020-04-16
Applicant: Sony Corporation
Inventor： Danillo Graziosi , Arash Vosoughi
IPC: G06T11/40 , G06T3/00 , H04N19/186 , H04N19/86
Abstract: A method for reducing color leaking artefacts in an image formed by projection processing from a 3D point cloud comprises: receiving an input image comprising the 3D point cloud; classifying the cloud into a plurality of surface patches; projecting the patches onto a plane to form a first 2D image; processing the first 2D image, by coding, transmitting and decoding, to form a final 2D image; and providing the final 2D image as an output. Processing includes independent patch processing to reduce inter-patch color leakage in the final 2D image, the independent patch processing including chroma sub-sampling pixels within each of the projected patches in the first 2D image separately; recombining the chroma sub-sampled patches to form a second 2D image; and compressing the second 2D image.
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公开(公告)号：US20210407139A1
公开(公告)日：2021-12-30
申请号：US17161319
申请日：2021-01-28
Applicant: SONY CORPORATION
Inventor： Danillo Graziosi , Ali Tabatabai
Abstract: A new hash Supplemental Enhancement Information (SEI) message for the V3C/V-PCC atlas frame is described herein. The message is used to signal the hash values that are computed for the syntax elements associated with each patch. The hash SEI message is able to be used for the V3C/V-PCC tile level and optionally for atlas level conformance testing. The hash is able to be used to confirm that the decoded values by the decoder are the same as the original values that were encoded by the encoder.
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公开(公告)号：US11190803B2
公开(公告)日：2021-11-30
申请号：US16525175
申请日：2019-07-29
Applicant: SONY CORPORATION
Inventor： Danillo Graziosi
Abstract: A method of point cloud coding using homography transform sends the homography transform of the 3D patches, instead of the explicit projection values (such as bounding boxes and patch orientation, rotation). The method has a more compact notation, is more efficient in terms of transmission, and allows for a faster decoding, particularly in cases where the 3D points will be reprojected.
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