Unlock instant, AI-driven research and patent intelligence for your innovation.

Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device

A technology of three-dimensional data and coding method, which is applied in image coding, image data processing, digital video signal modification, etc., and can solve problems such as large amount of point group data

Pending Publication Date: 2021-10-15
PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is expected that point cloud will become the mainstream as a representation method of 3D data, the data volume of point group is very large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device
  • Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device
  • Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0132] First, the data structure of the encoded three-dimensional data (hereinafter also referred to as encoded data) according to the present embodiment will be described. figure 1 It is a figure which shows the structure of the encoded three-dimensional data of this embodiment.

[0133] In the present embodiment, the three-dimensional space is divided into spaces (SPCs) corresponding to pictures in the encoding of moving images, and three-dimensional data is encoded in units of spaces. The space is further divided into volumes (VLMs) corresponding to macroblocks in video coding, and prediction and conversion are performed in units of VLMs. A volume includes the smallest unit, a number of voxels (VXL), corresponding to position coordinates. In addition, the prediction refers to generating predicted three-dimensional data similar to the processing unit of the processing target with reference to other processing units, and performing the prediction on the difference between th...

Embodiment approach 2

[0244] When the encoded data of the point cloud is used in an actual device or service, it is desirable to transmit and receive necessary information according to the application in order to suppress the network bandwidth. However, such a function does not exist in the conventional encoding structure of three-dimensional data, and thus there is no encoding method corresponding to this.

[0245] In this embodiment, a three-dimensional data encoding method and a three-dimensional data encoding apparatus for providing a function of transmitting and receiving required information according to the application in encoded data of a three-dimensional point cloud, and the A three-dimensional data decoding method and a three-dimensional data decoding device for decoding encoded data.

[0246] A voxel (VXL) having a certain feature amount or more is defined as a feature voxel (FVXL), and a world space (WLD) constituted by FVXL is defined as a sparse world space (SWLD). Figure 11 It is ...

Embodiment approach 3

[0342] In this embodiment, a method of transmitting and receiving three-dimensional data between vehicles will be described. For example, transmission and reception of three-dimensional data between the own vehicle and surrounding vehicles is performed.

[0343] Figure 24 It is a block diagram of the three-dimensional data creation apparatus 620 of this embodiment. The three-dimensional data creation device 620 is included in, for example, the own vehicle, and generates denser third three-dimensional data 636 by synthesizing the received second three-dimensional data 635 and the first three-dimensional data 632 created by the three-dimensional data creation device 620 .

[0344] The three-dimensional data creation device 620 includes a three-dimensional data creation unit 621 , a request range determination unit 622 , a search unit 623 , a reception unit 624 , a decoding unit 625 , and a synthesis unit 626 .

[0345] First, the three-dimensional data creation unit 621 creat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This three-dimensional data encoding method, when the number of three-dimensional points included in point cloud data to be encoded is n that is larger than a predetermined number (Yes in S7861), generates a hierarchical structure in which each of the plurality of pieces of attribute information on the n three-dimensional points is divided into high-frequency components and low-frequency components and is layered, and calculates a coding coefficient (S7862), generates a bitstream including the calculated coding coefficient (S7863), and when the number of three-dimensional points included in the point cloud data is m that is equal to or less than the predetermined number (No in S7861), generates a bitstream on the basis of the attribute information on m three-dimensional points without generating a hierarchical structure (S7864).

Description

technical field [0001] The present disclosure relates to a three-dimensional data encoding method, a three-dimensional data decoding method, a three-dimensional data encoding apparatus, and a three-dimensional data decoding apparatus. Background technique [0002] Devices and services that utilize 3D data will be widely used in large fields such as computer vision, map information, monitoring, infrastructure inspection, or image distribution for autonomous operation of automobiles and robots. Three-dimensional data is obtained by various methods such as distance sensors such as rangefinders, stereo cameras, or a combination of multiple monocular cameras. [0003] As one of the representation methods of three-dimensional data, there is a representation method called a point cloud in which the shape of a three-dimensional structure is represented by a point group in a three-dimensional space. Save the position and color of the point group in the point cloud. Although point c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/40
CPCH04N19/597H04N19/30G06T9/001H04N19/12H04N19/167H04N19/17H04N19/184H04N19/33G06T9/00
Inventor 杉尾敏康井口贺敬
Owner PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA