def expand_bbox(bbox,left=5,top=5,right=5,bottom=5):
   left_pixel = bbox[2]*(float(left)/100)
   top_pixel = bbox[3]*(float(top)/100)
   right_pixel = bbox[2]*(float(right)/100)
   bottom_pixel = bbox[3]*(float(bottom)/100)
   new_box = list(bbox)
   new_box[0] -=left_pixel
   new_box[1] -=top_pixel
   new_box[2] +=left_pixel+right_pixel
   new_box[3] +=top_pixel+bottom_pixel
   return new_box

def to_int_bbox(bbox):
   int_box = [
      int(bbox[0]),
      int(bbox[1]),
      int(bbox[2]),
      int(bbox[3])
   ]
   return int_box

# for dlib rectangle
def to_right_bottom_bbox(bbox):
   int_box = [
    bbox[0],
    bbox[1],
    bbox[2]+bbox[0],
    bbox[3]+bbox[1]
   ]
   return int_box