#6100. Phase disambiguation using spatio-temporally modulated illumination in depth sensing

September 2026publication date
Proposal available till 10-05-2025
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Journal’s subject area:
Computer Vision and Pattern Recognition;
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Abstract:
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.
Keywords:
Computational photography; Phase shifting; Time-of-flight camera

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