SPUMIC: Simultaneous phase unwrapping and multipath interference cancellation in time-of-flight cameras using spectral methods

Abstract

We propose a framework for simultaneous phase unwrapping and multipath interference cancellation (SPUMIC) in homodyne time-of-flight (ToF) cameras. Our multi-frequency acquisition framework is based on parametric modeling of the multipath interference phenomena. We use robust spectral estimation methods with low computational complexity to detect and estimate multipath parameters. Using simulations and analysis we demonstrate that our proposed solution is implementable in real-time on existing ToF cameras without requiring any hardware modifications.