Phase ambiguity is a major problem in the depth measurement in either time-of-flight or phase shifting. Resolving the ambiguity using a low frequency pattern sacrifices the depth resolution, and using multiple frequencies requires a number of observations. In this paper, we propose a phase disambiguation method that combines temporal and spatial modulation so that the high depth resolution is preserved while the number of observation is kept. A key observation is that the phase ambiguities of temporal and spatial domains appear differently with respect to the depth. Using this difference, the phase can disambiguate for a wider range of interest. We develop a prototype to show the effectiveness of our method through real-world experiments.

中文翻译：

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在深度感应中使用时空调制照明进行相位消歧

在飞行时间或相移中，相位模糊度是深度测量中的主要问题。使用低频模式解决歧义会牺牲深度分辨率，而使用多个频率则需要进行大量观察。在本文中，我们提出了一种将时间和空间调制相结合的相位消歧方法，以便在保持观察次数的同时，保留高深度分辨率。一个关键的观察结果是，时域和空间域的相位模糊度相对于深度出现了不同的变化。利用这一差异，相位可以消除更大范围的兴趣。我们开发了一个原型，通过实际实验展示了我们方法的有效性。