Abstract
A transient image is the optical impulse response
of a scene which visualizes light propagation during an ultrashort time interval. In this paper we discover that the data
captured by a multifrequency time-of-flight (ToF) camera is the
Fourier transform of a transient image, and identify the sources
of systematic error. Based on the discovery we propose a novel
framework of frequency-domain transient imaging, as well as
algorithms to remove systematic error. The whole process of
our approach is of much lower computational cost, especially
lower memory usage, than Heide et al.’s approach using the
same device. We evaluate our approach on both synthetic and
real-datasets.
Keywords-transient imaging; Fourier analysis; time-of-flight
camera; multifrequency