def Iou(rec1,rec2):
  x1,x2,y1,y2 = rec1 #分别是第一个矩形左右上下的坐标
  x3,x4,y3,y4 = rec2 #分别是第二个矩形左右上下的坐标
  area_1 = (x2-x1)*(y1-y2)
  area_2 = (x4-x3)*(y3-y4)
  sum_area = area_1 + area_2
  w1 = x2 - x1#第一个矩形的宽
  w2 = x4 - x3#第二个矩形的宽
  h1 = y1 - y2
  h2 = y3 - y4
  W = min(x1,x2,x3,x4)+w1+w2-max(x1,x2,x3,x4)#交叉部分的宽
  H = min(y1,y2,y3,y4)+h1+h2-max(y1,y2,y3,y4)#交叉部分的高
  Area = W*H#交叉的面积
  Iou = Area/(sum_area-Area)
  return Iou

def Giou(rec1,rec2):
  x1,x2,y1,y2 = rec1 #分别是第一个矩形左右上下的坐标
  x3,x4,y3,y4 = rec2
  iou = Iou(rec1,rec2)
  area_C = (max(x1,x2,x3,x4)-min(x1,x2,x3,x4))*(max(y1,y2,y3,y4)-min(y1,y2,y3,y4))
  area_1 = (x2-x1)*(y1-y2)
  area_2 = (x4-x3)*(y3-y4)
  sum_area = area_1 + area_2
  w1 = x2 - x1#第一个矩形的宽
  w2 = x4 - x3#第二个矩形的宽
  h1 = y1 - y2
  h2 = y3 - y4
  W = min(x1,x2,x3,x4)+w1+w2-max(x1,x2,x3,x4)#交叉部分的宽
  H = min(y1,y2,y3,y4)+h1+h2-max(y1,y2,y3,y4)#交叉部分的高
  Area = W*H#交叉的面积
  add_area = sum_area - Area #两矩形并集的面积
  end_area = (area_C - add_area)/area_C #(c/(AUB))/c的面积
  giou = iou - end_area
  return giou


rec1 = (27,47,130,90)
rec2 = (30,68,150,110)
iou = Iou(rec1,rec2)
giou = Giou(rec1,rec2)
print("Iou = {},Giou = {}".format(iou,giou))