Multi-frequency Phase Unwrapping for Time-of-Flight cameras

@article{Droeschel2010MultifrequencyPU,
  title={Multi-frequency Phase Unwrapping for Time-of-Flight cameras},
  author={David Droeschel and Dirk Holz and Sven Behnke},
  journal={2010 IEEE/RSJ International Conference on Intelligent Robots and Systems},
  year={2010},
  pages={1463-1469}
}
Time-of-Flight (ToF) cameras gain depth information by emitting amplitude-modulated near-infrared light and measuring the phase shift between the emitted and the reflected signal. The phase shift is proportional to the object's distance modulo the wavelength of the modulation frequency. This results in a distance ambiguity. Distances larger than the wavelength are wrapped into the sensor's non-ambiguity range and cause spurious distance measurements. We apply Phase Unwrapping to reconstruct… CONTINUE READING
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