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    Occupancy map block-to-patch information compression
    31.
    发明授权
    Occupancy map block-to-patch information compression 有权

    公开(公告)号：US11748916B2

    公开(公告)日：2023-09-05

    申请号：US17804477

    申请日：2022-05-27

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Alexandros Tourapis ,  Yeping Su ,  Jungsun Kim ,  Fabrice A. Robinet ,  Valery G. Valentin

    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. Various compression strategies may be used to encode an occupancy map and related block-to-patch information indicating which portions of the image frame correspond to which packed patches. Packed image frames comprising patches and padding, along with an encoded occupancy map and related block-to-patch information are sent to a decoder. The decoder is configured to generate a decompressed point cloud based on the packed image frames, compressed occupancy map, and related block-to-patch information.

    Adaptive distance based point cloud compression
    32.
    发明授权
    Adaptive distance based point cloud compression 有权

    公开(公告)号：US11727603B2

    公开(公告)日：2023-08-15

    申请号：US17318273

    申请日：2021-05-12

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Jungsun Kim ,  Valery G. Valentin ,  Fabrice A. Robinet ,  Yeping Su ,  Alexandros Tourapis

    IPC: G06T9/00 ,  G06T7/50

    CPC classification number: G06T9/00 ,  G06T7/50 ,  G06T2207/10012 ,  G06T2207/10028

    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, attribute values are predicted using one of a plurality of prediction strategies, wherein a selected prediction strategy is selected based at least in part on attribute variability of points in a neighborhood of points. A decoder follows a similar prediction process. Also, attribute correction values may be determined to correct predicted attribute values and may be used by a decoder to decompress a point cloud, wherein the decoder applies the same prediction strategy applied at the encoder.

    Point cloud compression image padding
    34.
    发明授权
    Point cloud compression image padding 有权

    公开(公告)号：US11386524B2

    公开(公告)日：2022-07-12

    申请号：US16586872

    申请日：2019-09-27

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Alexandros Tourapis ,  Jungsun Kim ,  Yeping Su ,  David W. Singer ,  Valery G. Valentin ,  Fabrice A. Robinet

    IPC: G06T3/40 ,  G06T5/00 ,  G06T9/00

    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. 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, wherein pixel values for the padding are determined based on neighboring pixels values such that the padding is smoothed in the image frame. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud.

    Occupancy map block-to-patch information compression
    35.
    发明授权
    Occupancy map block-to-patch information compression 有权

    公开(公告)号：US11367224B2

    公开(公告)日：2022-06-21

    申请号：US16591530

    申请日：2019-10-02

    Applicant: Apple Inc.

    Inventor： Khaled Mammou ,  Alexandros Tourapis ,  Yeping Su ,  Jungsun Kim ,  Fabrice A Robinet ,  Valery G. Valentin

    IPC: G06T9/00 ,  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. Various compression strategies may be used to encode an occupancy map and related block-to-patch information indicating which portions of the image frame correspond to which packed patches. Packed image frames comprising patches and padding, along with an encoded occupancy map and related block-to-patch information are sent to a decoder. The decoder is configured to generate a decompressed point cloud based on the packed image frames, compressed occupancy map, and related block-to-patch information.

    Point cloud compression with adaptive filtering
    37.
    发明授权
    Point cloud compression with adaptive filtering 有权

    公开(公告)号：US11017566B1

    公开(公告)日：2021-05-25

    申请号：US16459483

    申请日：2019-07-01

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Khaled Mammou ,  Yeping Su ,  Jungsun Kim ,  Valery G. Valentin ,  David W. Singer ,  Fabrice A. Robinet ,  Hsi-Jung Wu

    IPC: G06T9/00 ,  G06T3/40 ,  H03M7/30 ,  G06T17/20

    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 processing/filtering element utilizes occupancy map information and/or auxiliary patch information to determine relationships between patches in image frames and adjusts encoding/decoding and/or filtering or pre/post-processing parameters based on the determined relationships.

    Point cloud compression using fixed-point numbers
    38.
    发明授权
    Point cloud compression using fixed-point numbers 有权

    公开(公告)号：US10853973B2

    公开(公告)日：2020-12-01

    申请号：US16592711

    申请日：2019-10-03

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Valery G. Valentin ,  Fabrice A. Robinet ,  Khaled Mammou ,  Jungsun Kim ,  Yeping Su

    IPC: G06T9/00

    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. Attribute values for at least one starting point are included in a compressed attribute information file and attribute correction values are included in the compressed attribute information file. Attribute values are predicted based, at least in part, on attribute values of neighboring points. The predicted attribute values are compared to attribute values of a point cloud prior to compression to determine attribute correction values. In order to improve computing efficiency and/or repeatability, fixed-point number representations are used when determining predicted attribute values and 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 using fixed-point number representations.

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