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arXiv 2207.03074cs.SDeess.ASeess.IV
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野外环境下的视觉辅助声源深度估计

Visual-Assisted Sound Source Depth Estimation in the Wild

The University of Texas at Austin(德克萨斯大学奥斯汀分校)

Wei Sun, Lili Qiu

摘要:

深度估计支持各种各样的3D应用,例如机器人、自动驾驶和虚拟现实。尽管在该领域中进行了大量的工作,但如何实现准确、低成本、高分辨率和大范围的深度估计仍然是开放的。受闪电爆炸现象(即看到闪电后听到雷声)的启发,本文开发了第一个视听深度估计框架FBDepth。它需要光和声音的飞行时间(ToF)之间的差异来推断声源深度。FBDepth是第一个将视频和音频与语义特征和空间提示结合起来进行范围估计的工具。它首先对齐视频轨道和音频轨道之间的对应关系,以粗粒度定位目标对象和目标声音。FBDepth基于对运动对象运动轨迹的观察,提出了通过估计发声前后光流的交点来及时定位视频事件。FBDepth为最终的深度估计提供视频事件和音频剪辑的估计时间戳。我们使用手机收集3000+视频剪辑与20个不同的对象在高达$50m$。与基于RGB的方法相比,FBDepth将绝对相对误差(AbsRel)降低了55%。

英文摘要:

Depth estimation enables a wide variety of 3D applications, such as robotics, autonomous driving, and virtual reality. Despite significant work in this area, it remains open how to enable accurate, low-cost, high-resolution, and large-range depth estimation. Inspired by the flash-to-bang phenomenon (i.e. hearing the thunder after seeing the lightning), this paper develops FBDepth, the first audio-visual depth estimation framework. It takes the difference between the time-of-flight (ToF) of the light and the sound to infer the sound source depth. FBDepth is the first to incorporate video and audio with both semantic features and spatial hints for range estimation. It first aligns correspondence between the video track and audio track to locate the target object and target sound in a coarse granularity. Based on the observation of moving objects' trajectories, FBDepth proposes to estimate the intersection of optical flow before and after the sound production to locate video events in time. FBDepth feeds the estimated timestamp of the video event and the audio clip for the final depth estimation. We use a mobile phone to collect 3000+ video clips with 20 different objects at up to $50m$. FBDepth decreases the Absolute Relative error (AbsRel) by 55\% compared to RGB-based methods.

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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