The histogram between Figure 3(b) and label.txt are difference

[BossunWang]

Hi expert,
I try to verify histogram with your "label.txt" on Figure 3(b)
but I found large difference between Figure 3(b) and label.txt.
The following statistics from "label.txt":

data size: 12852
pitch_angle 0 ~ 30, 30 ~ 60, 60 ~ 90: [156625, 550, 9]
yaw_angle 0 ~ 30, 30 ~ 60, 60 ~ 90: [145847, 8444, 2893]
roll_angle 0 ~ 30, 30 ~ 60, 60 ~ 90: [156987, 192, 5]
total image size: 12852
total_face_size: 157184

There only the size of face are 59434 on Figure 3(b), but 157184 on "label.txt"
May you tell me how to calculate your histogram? Thanks