An event camera is a novel vision sensor that can capture per-pixel brightness changes and output a stream of asynchronous ``events''. It has advantages over conventional cameras in those scenes with high-speed motions and challenging lighting conditions because of the high temporal resolution, high dynamic range, low bandwidth, low power consumption, and no motion blur. Therefore, several supervised monocular depth estimation from events is proposed to address scenes difficult for conventional cameras. However, depth annotation is costly and time-consuming. In this paper, to lower the annotation cost, we propose a self-supervised event-based monocular depth estimation framework named EMoDepth. EMoDepth constrains the training process using the cross-modal consistency from intensity frames that are aligned with events in the pixel coordinate. Moreover, in inference, only events are used for monocular depth prediction. Additionally, we design a multi-scale skip-connection architecture to effectively fuse features for depth estimation while maintaining high inference speed. Experiments on MVSEC and DSEC datasets demonstrate that our contributions are effective and that the accuracy can outperform existing supervised event-based and unsupervised frame-based methods.

提出了一种自我监督的基于事件感知的单目深度估计框架EMoDepth，利用来自与像素坐标中的事件对齐的强度帧的跨模态一致性约束训练过程，并且在推理中仅使用事件进行单目深度预测，同时设计了多尺度跳跃连接架构以有效融合用于深度估计的特征，并保持高推理速度。在MVSEC和DSEC数据集上的实验证明了方法的有效性，并且精度能够超过现有的有监督基于事件感知和无监督基于帧的方法。

基于自我监督的事件驱动单目深度估计与跨模态一致性