Recent progress in 3D object detection from single images leverages monocular depth estimation as a way to produce 3D pointclouds, turning cameras into pseudo-lidar sensors. These two-stage detectors improve with the accuracy of the intermediate depth estimation network, which can itself be improved without manual labels via large-scale self-supervised learning. However, they tend to suffer from overfitting more than end-to-end methods, are more complex, and the gap with similar lidar-based detectors remains significant. In this work, we propose an end-to-end, single stage, monocular 3D object detector, DD3D, that can benefit from depth pre-training like pseudo-lidar methods, but without their limitations. Our architecture is designed for effective information transfer between depth estimation and 3D detection, allowing us to scale with the amount of unlabeled pre-training data. Our method achieves state-of-the-art results on two challenging benchmarks, with 16.34% and 9.28% AP for Cars and Pedestrians (respectively) on the KITTI-3D benchmark, and 41.5% mAP on NuScenes.

本文介绍了一种称之为DD3D的单阶段，端对端的单目3D对象检测器，能够借助深度预训练提升准确性并解决如伪激光雷达方法的限制，通过深度估计和三维检测之间的有效信息传输，在大规模无标记数据的帮助下，达到了KITTI-3D基准测试中的16.34％和9.28％AP的最新结果, 以及在NuScenes中的41.5％mAP。

单目三维物体检测是否需要伪激光雷达？