# make sure that the cropped image contains at least one face > 16 pixel at training image scale
b_w_t = (boxes_t[:, 2] - boxes_t[:, 0] + 1) / w * img_dim
b_h_t = (boxes_t[:, 3] - boxes_t[:, 1] + 1) / h * img_dim
mask_b = np.minimum(b_w_t, b_h_t) > 5
in data/data_augment.py, line 61
choose a box size larger than 5, not 16 why?