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BAT: Learning Event-based Optical Flow with Bidirectional Adaptive Temporal Correlation by Xu, Gangwei; Lin, Haotong; Zhang, Zhaoxing; Luo, Hongcheng; Sun, Haiyang; Yang, Xin is a scholarly article available to read on EtoBox.

What is BAT: Learning Event-based Optical Flow with Bidirectional Adaptive Temporal Correlation about?

Event cameras deliver visual information characterized by a high dynamic range and high temporal resolution, offering significant advantages in estimating optical flow for complex lighting conditions and fast-moving objects. Current advanced optical flow methods for event cameras largely adopt established image-based frameworks. However, the spatial sparsity of event data limits their performance. In this paper, we present BAT, an innovative framework that estimates event-based optical flow using bidirectional adaptive temporal correlation. BAT includes three novel designs: 1) a bidirectional temporal correlation that transforms bidirectional temporally dense motion cues into spatially dense ones, enabling accurate and spatially dense optical flow estimation; 2) an adaptive temporal sampling strategy for maintaining temporal consistency in correlation; 3) spatially adaptive temporal motion aggregation to efficiently and adaptively aggregate consistent target motion features into adjacent motion features while suppressing inconsistent ones. Our results rank $1^{st}$ on the DSEC-Flow benchmark, outperforming existing state-of-the-art methods by a large margin while also exhibiting sh

Author

Xu, Gangwei; Lin, Haotong; Zhang, Zhaoxing; Luo, Hongcheng; Sun, Haiyang; Yang, Xin

Published

2025

Language

EN