公开(公告)号：US20240095265A1

公开(公告)日：2024-03-21

申请号：US18526801

申请日：2023-12-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaoran Cao ,  Pei Wang ,  Kangying Cai

IPC: G06F16/29 ,  G06T17/05

CPC classification number: G06F16/29 ,  G06T17/05

Abstract: A method and an apparatus for retrieving a 3D map is provided. The method for retrieving a 3D map includes: obtaining binary data of a plurality of 3D map descriptors, where the plurality of 3D map descriptors correspond to at least one 3D map point of a 3D map; obtaining a retrieval descriptor, where the retrieval descriptor is a feature that corresponds to a real environment and that is extracted from visual information collected by a sensor of an electronic device; and performing retrieval in the binary data of the plurality of 3D map descriptors based on binary data of the retrieval descriptor, to obtain at least one target 3D map descriptor, where a length of binary data of each of the plurality of 3D map descriptors is different from a length of the binary data of the retrieval descriptor.

公开(公告)号：US20240119639A1

公开(公告)日：2024-04-11

申请号：US18526677

申请日：2023-12-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaoran Cao ,  Kangying Cai ,  Pei Wang ,  Chenxi Tu ,  Qi Su

IPC: G06T9/00 ,  G06T17/05

CPC classification number: G06T9/00 ,  G06T17/05

Abstract: An apparatus and a method for decoding a 3D map, and an encoded bitstream of a 3D map are provided. The apparatus for decoding a 3D map includes a transmitter and a decompressor. The transmitter is configured to receive a bitstream of a 3D map, where the 3D map includes a plurality of 3D map points. The decompressor is configured to decompress the bitstream of the 3D map to obtain reconstructed data of the 3D map, where the reconstructed data of the 3D map includes reconstructed data of the plurality of 3D map points. In this application, the decompressor end may support decompression of compressed data of the 3D map, to support compression/decompression of data of the 3D map.

公开(公告)号：US20240112372A1

公开(公告)日：2024-04-04

申请号：US18526734

申请日：2023-12-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaoran Cao ,  Kangying Cai ,  Pei Wang

IPC: G06T9/00 ,  G06T17/00

CPC classification number: G06T9/00 ,  G06T17/00

Abstract: Embodiments of this application belong to the field of 3D map technologies, and disclose methods and apparatuses for compressing and decompressing a 3D map, to reduce a data volume of a 3D map. The method for compressing a 3D map includes: obtaining a 3D map descriptor, where the 3D map descriptor corresponds to at least one 3D map point of the 3D map; performing binarization on a relationship between the 3D map descriptor and at least one preset threshold vector to obtain binary data; and performing quantization on a difference between the 3D map descriptor and the at least one preset threshold vector to obtain quantized data. In embodiments of this application, storage space required for storing a 3D map can be reduced, or transmission resources required for transmitting a 3D map can be reduced.

公开(公告)号：US20240104781A1

公开(公告)日：2024-03-28

申请号：US18528022

申请日：2023-12-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaoran Cao ,  Pei Wang ,  Kangying Cai ,  Chenxi Tu

IPC: G06T9/00

CPC classification number: G06T9/00

Abstract: A three-dimensional (3D) map compression method includes performing compaction processing on a to-be-encoded descriptor to obtain a first compact representation of the to-be-encoded descriptor, where the to-be-encoded descriptor corresponds to at least one 3D map point on a 3D map. A compact representation of at least one reference descriptor corresponding to the to-be-encoded descriptor is obtained, followed by obtaining a second compact representation of the to-be-encoded descriptor based on the first compact representation of the to-be-encoded descriptor and the compact representation of the at least one reference descriptor and encapsulating the second compact representation to obtain a bitstream of the 3D map.

公开(公告)号：US20240102826A1

公开(公告)日：2024-03-28

申请号：US18526721

申请日：2023-12-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaoran Cao ,  Kangying Cai ,  Pei Wang ,  Chenxi Tu ,  Qi Su

IPC: G01C21/00 ,  G06T9/00

CPC classification number: G01C21/3896 ,  G06T9/00

Abstract: An apparatus and a method for encoding a 3D map are provided. The apparatus for encoding a 3D map includes a compression module (51) and a transmission module (52). The compression module (51) is configured to compress data of a 3D map to obtain a bitstream of the 3D map, where the 3D map includes a plurality of 3D map points, and the data of the 3D map includes data of the plurality of 3D map points. The transmission module (52) is configured to transmit the bitstream of the 3D map. With the use of the apparatus, a data volume of a 3D map can be reduced, thereby reducing transmission bandwidth and improving transmission efficiency.