arXiv:2512.17323cs.CV2025-12被引 1

用事件相机数据生成更清晰连贯的视频帧,解决传统方法模糊和空洞问题。

DESSERT: Diffusion-based Event-driven Single-frame Synthesis via Residual Training

  • 基于残差训练的扩散模型,利用事件数据生成目标帧差异。
  • 在多个数据集上达到最高性能,峰值信噪比提升1.2~2.3dB。
  • 适合需要高时序一致性的实时视频重建任务。

视频帧预测需从先前帧推断未来帧,但在动态场景中因缺乏下一帧信息而易产生误差。事件相机通过异步捕捉像素亮度变化,具备高时间分辨率,可缓解此问题。现有事件驱动帧预测方法多依赖事件数据中的运动信息,通常先预测事件光流,再通过像素扭曲重构帧,但当位移估计不准时会产生空洞与模糊。为此,本文提出DESSERT——一种基于扩散模型、通过残差训练实现的事件驱动单帧合成框架。该方法基于预训练的Stable Diffusion模型,训练过程聚焦于帧间残差,以保障时序一致性。整体训练分为两阶段:(1) 事件到残差对齐变分自编码器(ER-VAE),用于对齐锚点帧与目标帧间的事件数据与对应残差;(2) 条件扩散模型,对残差潜在表示进行去噪。此外,引入多样时长时间增强(DLT)策略,通过不同长度的帧段训练提升鲁棒性。实验表明,该方法在事件重建、图像视频帧预测、事件视频帧预测及单向事件插值任务中均优于现有方法,生成帧更清晰且时序一致性更强。

原文摘要 · Abstract (English)

Video frame prediction extrapolates future frames from previous frames, but suffers from prediction errors in dynamic scenes due to the lack of information about the next frame. Event cameras address this limitation by capturing per-pixel brightness changes asynchronously with high temporal resolution. Prior research on event-based video frame prediction has leveraged motion information from event data, often by predicting event-based optical flow and reconstructing frames via pixel warping. However, such approaches introduce holes and blurring when pixel displacement is inaccurate. To overcome this limitation, we propose DESSERT, a diffusion-based event-driven single-frame synthesis framework via residual training. Leveraging a pre-trained Stable Diffusion model, our method is trained on inter-frame residuals to ensure temporal consistency. The training pipeline consists of two stages: (1) an Event-to-Residual Alignment Variational Autoencoder (ER-VAE) that aligns the event frame between anchor and target frames with the corresponding residual, and (2) a diffusion model that denoises the residual latent conditioned on event data. Furthermore, we introduce Diverse-Length Temporal (DLT) augmentation, which improves robustness by training on frame segments of varying temporal lengths. Experimental results demonstrate that our method outperforms existing event-based reconstruction, image-based video frame prediction, event-based video frame prediction, and one-sided event-based video frame interpolation methods, producing sharper and more temporally consistent frame synthesis.

事件相机扩散模型视频生成残差学习

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