Open-vocabulary querying in 3D space is challenging but essential for scene
understanding tasks such as object localization and segmentation.
Language-embedded scene representations have made progress by incorporating
language features into 3D spaces. However, their efficacy heavily depends on
neural networks that are resource-intensive in training and rendering. Although
recent 3D Gaussians offer efficient and high-quality novel view synthesis,
directly embedding language features in them leads to prohibitive memory usage
and decreased performance. In this work, we introduce Language Embedded 3D
Gaussians, a novel scene representation for open-vocabulary query tasks.
Instead of embedding high-dimensional raw semantic features on 3D Gaussians, we
propose a dedicated quantization scheme that drastically alleviates the memory
requirement, and a novel embedding procedure that achieves smoother yet high
accuracy query, countering the multi-view feature inconsistencies and the
high-frequency inductive bias in point-based representations. Our comprehensive
experiments show that our representation achieves the best visual quality and
language querying accuracy across current language-embedded representations,
while maintaining real-time rendering frame rates on a single desktop GPU.

通过使用一种新颖的场景表示方法 —— 嵌入语言的 3D 高斯模型，本研究在 3D 空间中实现了开放词汇查询任务，取得了最佳的视觉质量和语言查询准确性，并且保持在单个台式 GPU 上的实时渲染帧速率。