Author

Jiujiang Guo

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Preprint Aug 2026

Radar4D-VLM: Proposal-Grounded Temporal 4D Radar Reasoning Across Frozen Language Models

Radar4D-VLM is introduced, a radar-only temporal vision-language model that reasons from ten consecutive 4D-radar point-cloud sweeps without camera or LiDAR input, establishing a reproducible foundation for radar-only multimodal scene and motion reasoning while separating interface compatibility from the benefit of lan...

Jiajun Han, Xu Sun, Qike Zhang et al. · 0 citations

#artificial intelligence Preprint Sep 2026

InfraPatch: Cross-Task Targeted Grayscale Patch Attacks on Infrared-Adapted Vision-Language Models

Results show that small grayscale patches can inject chosen target semantics across IR-VLM families under a controlled digital threat model, motivating stronger robustness evaluation for infrared multimodal systems.

Chengyin Hu, Ding-Yi Lu, Jiajun Han et al. · 0 citations