Research Article

Countering Spoof: Towards Detecting Deepfake with Multidimensional Biological Signals

Figure 6

Different ways to generate ppg_map for real and fake videos. (a) When dealing with fake video, the stride of the sliding window is equal to the length of the sliding window. (b) When dealing with a real video, the stride of the sliding window is smaller than the length of the sliding window.
(a)
(b)