4D LangSplat: 4D Language Gaussian Splatting via Multimodal Large Language Models

Figure 1. Visualization of the learned language features of our 4D LangSplat. We observe that 4D LangSplat effectively learns dynamic semantic features that change over time, such as the gradual diffusion of coffee shown in the first two rows, and the "chicken" toggling between open and closed states in the latter two rows. Additionally, our semantic field captures consistent features for semantics that remain unchanged over time, with the clear object boundaries in the visualization demonstrating the precision of our semantic field.