Fig. 4
From: Phase disambiguation using spatio-temporally modulated illumination in depth sensing
Depth resolution along with the depth. According to Eqs. (25) and (26), the resolution of ToF is constant (blue) and the resolution of phase shifting is proportional to the square of the depth (orange). The depth dcross is the depth where the lines of the resolution of ToF and the resolution of the phase shifting is crossed. The proposed method can achieve the resolution that is close to the phase shifting in near range before dcross and the resolution that is close to the ToF in far range after dcross (green)