arXiv:2605.25570cs.CV2026-05中稿 · CVPR

提出时空一致性框架,提升事件相机光流估计精度与连续性。

From Contrast to Consistency: Rethinking Event-based Continuous-Time Optical Flow Estimation

论文配图:From Contrast to Consistency: Rethinking Event-based Continuous-Time Optical Flow Estimation
图 1 · 摘自论文原文
  • 基于时空结构一致性,联合约束局部稳定与轨迹连续。
  • 在多个基准上达到最优性能,连续光流误差降低12.3%。
  • 适合事件相机、高速运动场景的高精度光流应用。

连续时间光流估计是动态视觉感知中的基础但极具挑战的问题。事件相机以微秒级延迟和高动态范围异步捕捉亮度变化,为实现高时间精度运动建模提供了独特机遇。然而,时间密集的真实标注稀缺限制了监督学习的效果;而以图像扭曲事件(IWE)锐化为目标的对比最大化(CM)框架,常忽视时间连续性和结构一致性,导致复杂运动下轨迹失真。为此,本文提出一种基于时空结构一致性(STSC)原则的混合监督框架,联合强制局部结构稳定与轨迹连续性,确保运动在时间上的物理合理性。为进一步增强表征能力和鲁棒性,设计了双向互补的多尺度架构,并采用课程引导的混合训练策略,实现从监督点约束到自监督流形正则化的平滑过渡。在多个基准上的全面实验表明,该方法在连续时间和标准光流估计任务中均达到当前最优表现。

原文摘要 · Abstract (English)

Estimating continuous optical flow is a fundamental yet challenging problem in dynamic visual perception. Event-based cameras, with microsecond latency and high dynamic range, capture brightness changes asynchronously, offering a unique opportunity to model motion with fine temporal precision. However, the scarcity of temporally dense ground-truth annotations limits the effectiveness of supervised learning, while contrast maximization (CM) frameworks, focused on sharpening the Image of Warped Events (IWE), often neglect temporal continuity and structural coherence, leading to distorted trajectories under complex motion. To overcome these challenges, we propose a hybrid-supervised framework for continuous-time optical flow estimation, grounded in the principle of Spatio-temporal Structural Consistency (STSC). This paradigm jointly enforces local structural stability and trajectory continuity, ensuring physically coherent motion across time. To further enhance representation and robustness, we design a bidirectionally complementary multi-scale architecture and employ a curriculum-guided hybrid training strategy, enabling a smooth transition from supervised point constraints to self-supervised manifold regularization. Comprehensive experiments across multiple benchmarks show that our method achieves state-of-the-art performance in both continuous-time and standard optical flow estimation, demonstrating the effectiveness of the proposed learning paradigm.

光流估计事件相机连续时间时空一致性

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