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公开(公告)号：US20190075320A1
公开(公告)日：2019-03-07
申请号：US16121501
申请日：2018-09-04
Applicant: Apple Inc.
Inventor： Khaled Mammou , Fabrice A. Robinet , Andrea Cremaschi , Alexandros Tourapis
IPC: H04N19/597 , H04N19/59
CPC classification number: H04N19/597 , G06T17/00 , G06T2210/56 , H04N19/119 , H04N19/132 , H04N19/167 , H04N19/182 , H04N19/59
Abstract: A system comprises an encoder configured to compress a point cloud comprising a plurality of points each point comprising spatial information for the point. The encoder is configured to sub-sample the points and determine subdivision locations for the subsampled points. Also, the encoder is configured to determine, for respective subdivision location, if a point is to be included, not included, or relocated relative to the subdivision location. The encoder encodes spatial information for the sub-sampled points and encodes subdivision location point inclusion/relocation information to generate a compressed point cloud. A decoder recreates an original or near replica of an original point cloud based on the spatial information and the subdivision location inclusion/relocation information included in the compressed point cloud.
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公开(公告)号：US12094179B2
公开(公告)日：2024-09-17
申请号：US17822651
申请日：2022-08-26
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Fabrice A. Robinet , Jungsun Kim , Khaled Mammou , Valery G. Valentin , Yeping Su
IPC: G06T9/00 , H04N19/597
CPC classification number: G06T9/001 , H04N19/597
Abstract: A system comprises an encoder configured to compress attribute information and/or spatial information for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. The encoder is configured to convert a point cloud into an image based representation. The encoder packs patch images into an image frame and fills empty spaces in the image frame with a padding. The encoder is also configured to determine quantized minimum depths and/or maximum depths patch images in the image frames, wherein depth information is signaled relative to the quantized minimum depth.
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公开(公告)号：US20240119641A1
公开(公告)日：2024-04-11
申请号：US18545966
申请日：2023-12-19
Applicant: Apple Inc.
Inventor： David Flynn , Khaled Mammou , Fabrice A. Robinet
CPC classification number: G06T9/40 , G06T17/005 , G06T2210/56
Abstract: An example method includes receiving a plurality of points that represent a point cloud; representing a position of the point in each dimension of a three-dimensional space as a sequence of bits, where the position of the point is encoded according to a tree data structure; partitioning at least one of the sequences of bits into a first portion of bits and a second portion of bits; quantizing each of the second portions of bits according to a quantization step size, where the quantization step size is determined according to an exponential function having a quantization parameter value as an input and the quantization step size as an output; and generating a data structure representing the point cloud and including the quantized second portions of bits.
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84.发明授权公开(公告)号：US11818401B2
公开(公告)日：2023-11-14
申请号：US17718647
申请日：2022-04-12
Applicant: Apple Inc.
Inventor： Alexandros Tourapis , Jungsun Kim , Valery G. Valentin , Fabrice A. Robinet , Yeping Su , Khaled Mammou
IPC: H04N19/96 , G06T9/00 , H04N19/176 , H04N19/91 , G06T17/00
CPC classification number: H04N19/96 , G06T9/00 , G06T17/005 , H04N19/176 , H04N19/91
Abstract: An encoder is configured to compress point cloud geometry information using an octree geometric compression technique that utilizes a binary arithmetic encoder, a look-ahead table, a cache, and a context selection process, wherein encoding contexts are selected based, at least in part, on neighborhood configurations. In a similar manner, a decoder is configured to decode compressed point cloud geometry information utilizing a binary arithmetic encoder, a look-ahead table, a cache, and a context selection process.
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公开(公告)号：US20230232044A1
公开(公告)日：2023-07-20
申请号：US18189099
申请日：2023-03-23
Applicant: Apple Inc.
Inventor： Jungsun Kim , Alexandros Tourapis , Khaled Mammou , Fabrice A. Robinet , Yeping Su , David W. Singer
IPC: H04N19/597 , H04N19/17
CPC classification number: H04N19/597 , H04N19/17 , G06T9/00
Abstract: A system comprises an encoder configured to compress attribute information and/or spatial information for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. In some embodiments, a bit stream structure may be used to communicate compressed point cloud data. The bit stream structure may include point cloud compression network abstraction layer (PCCNAL) units that enable use of groups of frames (GOFs), frame, and sub-frame signaling of patch information. Such a bit stream structure may permit low delay streaming and random access reconstruction of point clouds amongst other applications.
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Patent Agency Ranking
公开(公告)号：US20230095473A1
公开(公告)日：2023-03-30
申请号：US18052803
申请日：2022-11-04
Applicant: Apple Inc.
Inventor： Khaled Mammou , Yeping Su , Alexandros Tourapis , Jungsun Kim , Valery G. Valentin , Fabrice A. Robinet
IPC: G06T9/00 , G06T17/00 , G06F16/901 , G01S17/89
Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. A point cloud attribute transfer algorithm may be used to determine distortion between an original point cloud and a reconstructed point cloud. Additionally, the point cloud attribute transfer algorithm may be used to select attribute values for a reconstructed point cloud such that distortion between an original point cloud and a reconstructed version of the original point cloud is minimized.
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公开(公告)号：US11552651B2
公开(公告)日：2023-01-10
申请号：US17133394
申请日：2020-12-23
Applicant: Apple Inc.
Inventor： Khaled Mammou , Fabrice A. Robinet , Alexandros Tourapis , Yeping Su
IPC: H04N19/96 , H03M7/30 , H04N19/436 , H04N19/60 , H04N19/597
Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute information for the point cloud. Attribute values for at least one starting point are included in a compressed attribute information file and attribute correction values used to correct predicted attribute values are included in the compressed attribute information file. Attribute values are predicted based, at least in part, on attribute values of neighboring points and distances between a particular point for whom an attribute value is being predicted and the neighboring points. The predicted attribute values are compared to attribute values of a point cloud prior to compression to determine attribute correction values. A decoder follows a similar prediction process as an encoder and corrects predicted values using attribute correction values included in a compressed attribute information file.
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公开(公告)号：US11514611B2
公开(公告)日：2022-11-29
申请号：US17119893
申请日：2020-12-11
Applicant: Apple Inc.
Inventor： Khaled Mammou , Yeping Su , David W. Singer , Alexandros Tourapis , Fabrice A. Robinet , Hsi-Jung Wu
Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. A closed-loop color conversion process is used to improve compression while taking into consideration distortion introduced throughout the point cloud compression process.
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公开(公告)号：US11508095B2
公开(公告)日：2022-11-22
申请号：US17163194
申请日：2021-01-29
Applicant: Apple Inc.
Inventor： Khaled Mammou , Alexandros Tourapis , Jungsun Kim , Fabrice A. Robinet , Valery G. Valentin , Yeping Su
Abstract: A system comprises an encoder configured to compress attribute information for a point cloud and/or a decoder configured to decompress compressed attribute for the point cloud. To compress the attribute information, multiple levels of detail are generated based on spatial information. Also, attribute values are predicted based on the level of details. A decoder follows a similar prediction process based on level of details. Also, attribute correction values may be determined to correct predicted attribute values and may be used by a decoder to decompress a point cloud compressed using level of detail attribute compression. In some embodiments, an update operation is performed to smooth attribute correction values taking into account an influence factor of respective points in a given level of detail on attributes in other levels of detail.
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公开(公告)号：US11494947B2
公开(公告)日：2022-11-08
申请号：US17119938
申请日：2020-12-11
Applicant: Apple Inc.
Inventor： Khaled Mammou , Yeping Su , Alexandros Tourapis , Jungsun Kim , Valery G. Valentin , Fabrice A. Robinet
IPC: G06T9/00 , G06T17/00 , G06F16/901 , G01S17/89
Abstract: A system comprises an encoder configured to compress attribute information and/or spatial for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. A point cloud attribute transfer algorithm may be used to determine distortion between an original point cloud and a reconstructed point cloud. Additionally, the point cloud attribute transfer algorithm may be used to select attribute values for a reconstructed point cloud such that distortion between an original point cloud and a reconstructed version of the original point cloud is minimized.
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