what index does the label of widerface and celeba start from, 0 or 1?

[daikankan]

for widerface
wider_face_train_bbx_gt.txt
Number of bounding box
x1, y1, w, h, blur, expression, illumination, invalid, occlusion, pose
what index does x1 and y1 start, 0 or 1?

for celeba
list_landmarks_celeba.txt
202599
lefteye_x lefteye_y righteye_x righteye_y nose_x nose_y leftmouth_x leftmouth_y rightmouth_x rightmouth_y
000001.jpg 165 184 244 176 196 249 194 271 266 260
what index does the landmark label start from, 0 or 1?

for python, image index start from 0, for matlab index start from 1, so the label start from which index?
I know it is just a pixel, but for landmark localization, it's important.