This paper presents a fast and simple multi-path
depth retrieval method based on the Inverse Discrete Fourier
Transform (IDFT) for Indirect Time of Flight (IToF) imaging
capable of achieving super-resolution in the time domain from
a limited number of samples in the frequency domain. To this
aim, an ad hoc hardware architecture providing quasi-optimal
Fourier measurements by means of a single-shot multifrequency
ToF sensor concept is exploited. The proposed method has been
validated for one and two bounces, showing that the system is
able to recover the distance to both targets in one shot with 16
frequencies (2 -32 MHz).
Keywords: CMOS image sensor, macropixel, multi-frequency, multi-path, single-shot, ToF