A Motion Detection Algorithm Using Local Phase Information

Figure 10

The ratio for the phase-based motion detector is defined as follows: we set the motion detected in the contrast case as the baseline; we compute the ratio between the PMI index for the lower contrast video and that for the full contrast video for each block; the ratios are averaged across all the blocks where motion is detected in the full contrast video; the average is given as the ratio for the phase-based motion detector. The ratio for the Reichardt motion detector and the Barlow-Levick motion detector is similarly defined.