3D Mesh Attribute Transfer for Dynamic Compression Compatibility

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Solution Overview

Problem

Existing mesh coding techniques face challenges in efficiently encoding dynamic meshes due to incompatibilities between attribute maps and re-sampled or re-parameterized meshes, leading to suboptimal compression and rendering quality.

Innovation Solution

The proposed method involves attribute transfer techniques to compute new attribute maps coherent with re-meshed and/or re-parametrized meshes, utilizing pre-processing stages like re-meshing and re-parameterization to enhance compatibility and compression efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If re-meshing and re-parameterization are applied to improve compression efficiency, then compression efficiency is improved, but incompatibility between attribute maps and re-sampled mesh increases

Engineering Contradiction:

Improvecompression efficiencyVSAvoidattribute map compatibility

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies attribute transfer as a pre-processing step before compression encoding. By computing new attribute maps that are coherent with the re-meshed and re-parameterized mesh structure in advance, the system ensures compatibility is established before the compression process begins, resolving the incompatibility issue while maintaining compression efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent transforms attribute values from the original mesh coordinate system to the re-meshed mesh coordinate system through parameter transformation. This involves computing new attribute maps using the re-meshed vertex positions and connectivity as parameters, ensuring the attribute data aligns with the modified mesh structure

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If re-meshing is applied to reduce mesh complexity, then device complexity is reduced, but attribute map coherence deteriorates

Engineering Contradiction:

Improvemesh complexityVSAvoidattribute map coherence

Core Design Contradiction:

Device complexityVSStability of the object's composition

Solution Approach 1:

The patent creates a copy of the attribute data and transforms it to match the re-meshed structure. Instead of directly modifying original attribute maps, the system generates new attribute maps that replicate the necessary information in a form coherent with the simplified mesh, preserving attribute coherence while reducing mesh complexity

Inventive Principle:

Principle #26Copying

Data Source

PatentUS12354221B2Attribute transfer for efficient dynamic mesh coding

Publication Date: 2025.07.08 APPLE INC

AI summary

A three-dimensional (3D) mesh encoder is provided. The 3D mesh encoder can include a pre-processing stage configured to generate the mesh M by re-sampling the mesh M and computing a new atlas of parametrization with a fewer number of patches and relatively lower parameterization distortion. The 3D mesh encoder may include an attribute transfer stage for transferring attributes to the re-sampled mesh M.