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

Mesh compression via point cloud representation

A grid and basic grid technology, applied in the field of 3D graphics coding, can solve the problems of low efficiency and loss of data in RAW patch coding of 3D data.

Pending Publication Date: 2022-01-14
SONY CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can encode sparse point clouds, but RAW patches are not efficient for encoding 3D data, and further data (such as attributes of triangular faces) may be lost from this method

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
  • Mesh compression via point cloud representation
  • Mesh compression via point cloud representation
  • Mesh compression via point cloud representation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] A method of compressing 3D mesh data using a point cloud representation of a mesh surface has been described above. Embodiments utilize 3D surface patches to represent point clouds and perform temporally consistent global mapping of 3D patch surface data to 2D canvas images.

[0025]In 3D point cloud encoding using a video encoder, the projection from 3D to 2D is important to generate the video that will represent the point cloud. The most efficient way to generate those videos is to use 3D patches, which segment the surface of the object, and use an orthographic projection to generate segmented depth images, which are tied together and used as a video encoder input of. In current point cloud standards, it is not possible to encode 3D meshes because there is no defined way to encode the connectivity of meshes. Furthermore, if the vertex data is sparse, the standard performs poorly because it cannot exploit the correlation between vertices.

[0026] This paper describ...

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

A method of compressing meshes using a projection-based approach, and leveraging the tools and syntax already generated for projection-based point cloud compression is described herein. Similar to the V-PCC approach, the mesh is segmented into surface patches, only the difference is that the segments follow the connectivity of the mesh. Each surface patch (or 3D patch) is then projected to a 2D patch, whereby in the case of the mesh, the triangle surface sampling is similar to a common rasterization approach used in computer graphics. For each patch, the position of the projected vertices is kept in a list, along with the connectivity of those vertices. The sampled surface now resembles a point cloud, and is coded with the same approach used for point cloud compression. Additionally, the list of vertices and connectivity is encoded per patch, and this data is sent along with the coded point cloud data.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Patent Application Serial No. 62 / 946,194, filed December 10, 2019, entitled "Mesh Compression Via Point Cloud Representations," for all purposes, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to three-dimensional graphics. More specifically, the invention relates to the encoding of three-dimensional graphics. Background technique [0004] In recent years, a new method for compressing point clouds based on 3D to 2D projections is being standardized. This method is also known as V-PCC (video-based point cloud compression), which maps 3D point cloud data into several 2D patches (patch), and then further arranges these patches into atlas images, and then Encode it with a video encoder. The atlas image corresponds to the geometry of the points, their respective textures...

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): G06T7/593G06K9/62
CPCG06T7/593G06T2207/10016G06T2207/10024G06T2207/10028G06F18/241H04N19/597G06T9/001H04N19/70H04N19/184G06T17/20G06T15/08
Inventor D·格拉兹斯中神央二A·扎格托A·塔巴塔拜
Owner SONY CORP