Multi-UAV collaborative 3D object detection can perceive and comprehend complex environments by integrating complementary information, with applications encompassing traffic monitoring, delivery services and agricultural management. However, the extremely broad observations in aerial remote sensing and significant perspective differences across multiple UAVs make it challenging to achieve precise and consistent feature mapping from 2D images to 3D space in multi-UAV collaborative 3D object detection paradigm. To address the problem, we propose an unparalleled camera-based multi-UAV collaborative 3D object detection paradigm called UCDNet. Specifically, the depth information from the UAVs to the ground is explicitly utilized as a strong prior to provide a reference for more accurate and generalizable feature mapping. Additionally, we design a homologous points geometric consistency loss as an auxiliary self-supervision, which directly influences the feature mapping module, thereby strengthening the global consistency of multi-view perception. Experiments on AeroCollab3D and CoPerception-UAVs datasets show our method increases 4.7% and 10% mAP respectively compared to the baseline, which demonstrates the superiority of UCDNet.

提出了一种无与伦比的基于相机的多UAV协同三维物体检测范式UCDNet，通过显式利用UAV到地面的深度信息作为强先验，为更准确和可推广的特征映射提供参考。此外，设计了一种同质点几何一致性损失作为辅助自监督方法，直接影响特征映射模块，从而增强多视角感知的全局一致性。在AeroCollab3D和CoPerception-UAVs数据集上的实验结果表明，与基准方法相比，我们的方法分别提高了4.7％和10％的mAP，证明了UCDNet的优越性。

UCDNet: 基于可靠特征映射的多无人机协同三维物体检测网络