Authentic 4D Driving Simulation with a Video Generation Model

Simulating driving environments in 4D is crucial for developing accurate and immersive autonomous driving systems. Despite progress in generating driving scenes, challenges in transforming views and modeling the dynamics of space and time remain. To tackle these issues, we propose a fresh methodology that reconstructs real-world driving environments and utilizes a generative network to enable 4D simulation. This approach builds continuous 4D point cloud scenes by leveraging surround-view data from autonomous vehicles. By separating the spatial and temporal elements, it creates smooth keyframe sequences. Furthermore, video generation techniques are employed to produce lifelike 4D simulation videos from any given perspective. To extend the range of possible viewpoints, we incorporate training using decomposed camera poses, which allows for enhanced modeling of distant scenes. Additionally, we merge camera trajectory data to synchronize 3D points across consecutive frames, fostering a richer understanding of the evolving scene. With training across multiple scene levels, our method is capable of simulating scenes from any viewpoint and offers deep insight into the evolution of scenes over time in a consistent spatial-temporal framework. In comparison with current methods, this approach excels in maintaining consistency across views, background coherence, and overall accuracy, significantly contributing to the development of more realistic autonomous driving simulations.