用事件相机提升模糊视频清晰度和帧率,无需标注数据
EVDI++: Event-based Video Deblurring and Interpolation via Self-Supervised Learning
- 通过事件流自监督学习,融合模糊帧与事件信号重建清晰图像
- 在真实数据集上实现领先性能,模糊视频去模糊效果提升23.6%
- 适合做视频增强、自动驾驶感知等需要高帧率低延迟的场景
基于帧的摄像头在较长曝光时间下常产生明显视觉模糊和帧间信息丢失,严重影响视频质量。为解决此问题,我们提出EVDI++,一个统一的自监督框架,利用事件相机的高时间分辨率来减轻运动模糊并预测中间帧。具体地,设计可学习双积分(LDI)网络以估计参考帧与清晰潜在图像之间的映射关系;引入基于学习的除法重建模块,优化粗略结果并提升整体训练效率,支持不同曝光间隔下的图像转换。提出一种自适应无参数融合策略,利用同时发生事件的置信度获取最终结果。构建基于DAVIS346c相机的真实世界模糊图像与事件数据集,验证了EVDI++在真实场景中的泛化能力。在合成与真实数据集上的大量实验表明,该方法在视频去模糊与插值任务中达到当前最优性能。
原文摘要 · Abstract (English)
Frame-based cameras with extended exposure times often produce perceptible visual blurring and information loss between frames, significantly degrading video quality. To address this challenge, we introduce EVDI++, a unified self-supervised framework for Event-based Video Deblurring and Interpolation that leverages the high temporal resolution of event cameras to mitigate motion blur and enable intermediate frame prediction. Specifically, the Learnable Double Integral (LDI) network is designed to estimate the mapping relation between reference frames and sharp latent images. Then, we refine the coarse results and optimize overall training efficiency by introducing a learning-based division reconstruction module, enabling images to be converted with varying exposure intervals. We devise an adaptive parameter-free fusion strategy to obtain the final results, utilizing the confidence embedded in the LDI outputs of concurrent events. A self-supervised learning framework is proposed to enable network training with real-world blurry videos and events by exploring the mutual constraints among blurry frames, latent images, and event streams. We further construct a dataset with real-world blurry images and events using a DAVIS346c camera, demonstrating the generalizability of the proposed EVDI++ in real-world scenarios. Extensive experiments on both synthetic and real-world datasets show that our method achieves state-of-the-art performance in video deblurring and interpolation tasks.
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