arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2209.09359cs.CV
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E-VFIA:基于事件的关注视频帧插值

E-VFIA : Event-Based Video Frame Interpolation with Attention

Middle East Technical University(中东技术大学)

Onur Selim Kılıç, Ahmet Akman, A. Aydın Alatan

摘要:

视频帧内插(VFI)是一种基本的视觉任务,其目的是在两个连续的原始视频图像之间合成多个帧。大多数算法旨在通过仅使用关键帧来实现VFI,这是一个不适定问题,因为关键帧通常不会产生关于场景中对象的轨迹的任何准确精度。另一方面,基于事件的摄像机在视频的关键帧之间提供更精确的信息。最近一些基于事件的方法通过利用事件数据进行更好的光流估计来通过扭曲对视频帧进行内插来解决这个问题。然而,这些方法严重地受到重影效应的影响。另一方面,一些仅使用帧作为输入的基于内核的VFI方法已经表明,当使用Transformers备份时,可变形卷积可以是处理长距离依赖关系的可靠方法。我们提出了基于事件的视频帧插值与注意力(E-VFIA),作为一个轻量级的基于内核的方法。E-VFIA通过可变形卷积将事件信息与标准视频帧融合,生成高质量的插值帧。所提出的方法表示具有高时间分辨率的事件,并使用多头自注意力机制来更好地编码基于事件的信息,同时不易受到模糊和重影伪影的影响;因此,生成更清晰的帧。仿真结果表明,所提出的技术优于当前国家的最先进的方法(帧和事件为基础的)与一个显着更小的模型大小。

英文摘要:

Video frame interpolation (VFI) is a fundamental vision task that aims to synthesize several frames between two consecutive original video images. Most algorithms aim to accomplish VFI by using only keyframes, which is an ill-posed problem since the keyframes usually do not yield any accurate precision about the trajectories of the objects in the scene. On the other hand, event-based cameras provide more precise information between the keyframes of a video. Some recent state-of-the-art event-based methods approach this problem by utilizing event data for better optical flow estimation to interpolate for video frame by warping. Nonetheless, those methods heavily suffer from the ghosting effect. On the other hand, some of kernel-based VFI methods that only use frames as input, have shown that deformable convolutions, when backed up with transformers, can be a reliable way of dealing with long-range dependencies. We propose event-based video frame interpolation with attention (E-VFIA), as a lightweight kernel-based method. E-VFIA fuses event information with standard video frames by deformable convolutions to generate high quality interpolated frames. The proposed method represents events with high temporal resolution and uses a multi-head self-attention mechanism to better encode event-based information, while being less vulnerable to blurring and ghosting artifacts; thus, generating crispier frames. The simulation results show that the proposed technique outperforms current state-of-the-art methods (both frame and event-based) with a significantly smaller model size.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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