B4DL provides a new benchmark, scalable data generation pipeline, and MLLM architecture for direct spatio-temporal reasoning on raw 4D LiDAR data.
How should the driver respond to the presence of the cyclist from frame 18 to frame 26?
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B4DL: A Benchmark for 4D LiDAR LLM in Spatio-Temporal Understanding
B4DL provides a new benchmark, scalable data generation pipeline, and MLLM architecture for direct spatio-temporal reasoning on raw 4D LiDAR data.