【MATLAB】评价二值分割结果的函数

根据PASCAL challenges的标准：intersection-over-union score，所写的matlab评价程序，处理二值图像。

其思想即分割结果与Ground Trueth的交集比上它们的并集，即为分割的准确率，代码如下：

 1 function performance =get_performance_iou_binary(ImgResult, ImgGT)
 2 
 3 % background color & foreground
 4 bg_color = 0 ;
 5 fg_color = 255 ;
 6 
 7 % check the size
 8 [rh rw rd] = size(ImgResult);
 9 [gh gw gd] = size(ImgGT);
10 
11 if rh~=gh || rw~=gw || rd~=gd
12     return;
13 end
14 
15 % performance by intersection-over-union
16 intersection=0;
17 unionsection=0;
18 
19 for i=1:rh
20     for j=1:rw
21         if ImgResult(i,j)==fg_color && ImgGT(i,j)==fg_color
22             intersection=intersection+1;
23         end
24         if ImgResult(i,j)==fg_color || ImgGT(i,j)==fg_color
25             unionsection=unionsection+1;
26         end
27     end
28 end
29 
30 if unionsection==0
31     performance=100;
32 else
33     performance=100*intersection/unionsection;
34 end
35 
36 end