SemLT3D: Semantic-Guided Expert Distillation for Camera-only Long-Tailed 3D Object Detection

ArXi:2604.18476v1 Announce Type: new Camera-only 3D object detection has emerged as a cost-effective and scalable alternative to LiDAR for autonomous driving, yet existing methods primarily prioritize overall performance while overlooking the severe long-tail imbalance inherent in real-world datasets. In practice, many rare but safety-critical categories such as children, strollers, or emergency vehicles are heavily underrepresented, leading to biased learning and degraded performance.