Python计算机视觉里的IOU计算实例

其中x1,y1;x2,y2分别表示两个矩形框的中心点

def calcIOU(x1, y1, w1, h1, x2, y2, w2, h2):
 if((abs(x1 - x2) < ((w1 + w2)/ 2.0)) and (abs(y1-y2) < ((h1 + h2)/2.0))):
   left = max((x1 - (w1 / 2.0)), (x2 - (w2 / 2.0)))
   upper = max((y1 - (h1 / 2.0)), (y2 - (h2 / 2.0)))

right = min((x1 + (w1 / 2.0)), (x2 + (w2 / 2.0)))
   bottom = min((y1 + (h1 / 2.0)), (y2 + (h2 / 2.0)))

inter_w = abs(left - right)
   inter_h = abs(upper - bottom)
   inter_square = inter_w * inter_h
   union_square = (w1 * h1)+(w2 * h2)-inter_square

calcIOU = inter_square/union_square * 1.0
   print("calcIOU:", calcIOU)
 else:
   print("No intersection!")

return calcIOU
def main():
 calcIOU(1, 2, 2, 2, 2, 1, 2, 2)

if __name__ == '__main__':
 main()

来源：https://blog.csdn.net/GAN_player/article/details/78201404