3D Gaussian Head Avatars with Expressive Dynamic Appearances by Compact Tensorial Representations

• URL: http://arxiv.org/abs/2504.14967v1
• Date: Mon, 21 Apr 2025 08:50:12 GMT
• Title: 3D Gaussian Head Avatars with Expressive Dynamic Appearances by Compact Tensorial Representations
• Authors: Yating Wang, Xuan Wang, Ran Yi, Yanbo Fan, Jichen Hu, Jingcheng Zhu, Lizhuang Ma,
• Abstract summary: We introduce an expressive and compact representation that encodes texture-related attributes of the 3D Gaussians in the tensorial format.<n>We store appearance of neutral expression in static tri-planes, and represents dynamic texture details for different expressions using lightweight 1D feature lines.<n>Experiments show this design enables accurate face dynamic details capturing while maintains real-time rendering and significantly reduces storage costs.
• Score: 41.303036354495816
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent studies have combined 3D Gaussian and 3D Morphable Models (3DMM) to construct high-quality 3D head avatars. In this line of research, existing methods either fail to capture the dynamic textures or incur significant overhead in terms of runtime speed or storage space. To this end, we propose a novel method that addresses all the aforementioned demands. In specific, we introduce an expressive and compact representation that encodes texture-related attributes of the 3D Gaussians in the tensorial format. We store appearance of neutral expression in static tri-planes, and represents dynamic texture details for different expressions using lightweight 1D feature lines, which are then decoded into opacity offset relative to the neutral face. We further propose adaptive truncated opacity penalty and class-balanced sampling to improve generalization across different expressions. Experiments show this design enables accurate face dynamic details capturing while maintains real-time rendering and significantly reduces storage costs, thus broadening the applicability to more scenarios.

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