公开(公告)号：US10897269B2

公开(公告)日：2021-01-19

申请号：US16133674

申请日：2018-09-17

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Fabrice A. Robinet ,  Alexandros Tourapis ,  Yeping Su

IPC: H03M7/30 ,  H04N19/96 ,  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.

公开(公告)号：US20200217937A1

公开(公告)日：2020-07-09

申请号：US16736703

申请日：2020-01-07

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Alexandros Tourapis ,  Jungsun Kim

IPC: G01S7/4861 ,  G01S17/42

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. An order for the points is determined based on a space filling curve, wherein an encoder and a decoder determine a same order for the points based on the space filling curve. Levels of detail are determined by sampling the ordered points according to different sampling parameters, and attribute values are predicted for the points in the levels of detail using the determined order. The encoder determines attribute correction values based on a comparison of the predicted values to an original value prior to compression. The decoder corrects the predicted attribute values based on received attribute correction values.

公开(公告)号：US20200111236A1

公开(公告)日：2020-04-09

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.

公开(公告)号：US10462485B2

公开(公告)日：2019-10-29

申请号：US16121501

申请日：2018-09-04

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Fabrice A. Robinet ,  Andrea Cremaschi ,  Alexandros Tourapis

IPC: H04N19/60 ,  H04N19/597 ,  H04N19/59 ,  H04N19/132 ,  H04N19/119 ,  H04N19/182 ,  H04N19/167 ,  G06T17/00

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.

公开(公告)号：US20190087979A1

公开(公告)日：2019-03-21

申请号：US16132230

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  Fabrice A. Robinet ,  Alexandros Tourapis ,  Yeping Su

IPC: 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. 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.

公开(公告)号：US20190087978A1

公开(公告)日：2019-03-21

申请号：US16133677

申请日：2018-09-17

Applicant: Apple Inc.

Inventor： Alexandros Tourapis ,  Khaled Mammou ,  Yeping Su ,  Fabrice A. Robinet ,  David W. Singer

IPC: G06T9/00 ,  G06T3/00

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. 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.

公开(公告)号：US20250054197A1

公开(公告)日：2025-02-13

申请号：US18806983

申请日：2024-08-16

Applicant: Apple Inc.

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

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. 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.

公开(公告)号：US20240412419A1

公开(公告)日：2024-12-12

申请号：US18807049

申请日：2024-08-16

Applicant: Apple Inc.

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

IPC: G06T9/00 ,  G01S17/89 ,  G06F16/901 ,  G06T17/00

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. 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.

公开(公告)号：US20240144541A1

公开(公告)日：2024-05-02

申请号：US18494679

申请日：2023-10-25

Applicant: Apple Inc.

Inventor： Jungsun Kim ,  Alexandros Tourapis ,  Khaled Mammou

IPC: G06T9/00

CPC classification number: G06T9/001

Abstract: A system comprises an encoder configured to compress and encode data for a three-dimensional mesh. To compress the three-dimensional mesh, the encoder determines displacements to be applied to sub-division locations of a base mesh. The displacement values may be signaled in their own sub-bitstream, e.g., a dedicated displacement data sub-bitstream, or may be signaled, at least in part, in an atlas data sub-bitstream that includes patch data. In some embodiments, the displacements may also be signaled, at least in part, in a video sub-bitstream or in a base-mesh sub-bitstream.

公开(公告)号：US20240127491A1

公开(公告)日：2024-04-18

申请号：US18545925

申请日：2023-12-19

Applicant: Apple Inc.

Inventor： Khaled Mammou ,  David Flynn ,  Alexandros Tourapis

IPC: G06T9/40

CPC classification number: G06T9/40

Abstract: A system receives encoded data regarding a points in a point cloud. The data includes a prediction tree having a nodes generated based on spatial information regarding the points and properties of a sensor system that obtained the spatial information. A value of each node represents first spatial coordinates of a respective one of the points according to a first coordinate system, and the value of at least a first node in the prediction tree is determined based on ancestor nodes of the first node and the properties of the sensor system. The system decodes the data to determine first data, including the first spatial coordinates of at least some of the points, and quantization parameters associated with the first spatial coordinates. The system determines second data based on the first data, including second spatial coordinates of at least some of the points according to a second coordinate system.