For each ID, there are 4 (1 reality +3 attack) X 8（8 capturing devices）X 26 (26 types of lighting conditions) = 832 videos.
For this dataset, there are 75 subjects X 832 videos/subject = 62,400 videos.
Surfing Tech has a variety of anti-fraud datasets:
6000 attack dataset, 3000 ID Screen arrack dataset, 100 ID 3D mask arrack dataset,
Anti-spoofing dataset, Hi-Fi Challenge dataset, and 3D mask attack dataset.
Some of these datasets were used in the 2019 CVPR challenge,
while others were used in the 2020 CVPR challenge, and some in the 2021 ICCV challenge
