matlab 人脸检测

clear;
i=imread（‘4.jpg‘）;
I=rgb2gray（i）;
BW=im2bw（I）;
imshow（BW）;
[n1 n2]=size（BW）;
r=floor（n1/10）;
c=floor（n2/10）;
x1=1;x2=r;
s=c*r;
for i=1:10
    y1=1;y2=c;
    for j=i:10
        if（y2<=c|y2>=9*c）|（x1==1|x2==r*10）
            loc=find（BW（x1:x2y1:y2）==0）;
            [o p]=size（loc）;
            pr=o*100/s;
            if pr<=100
               BW（x1:x2y1:y2）=0;
               r1=x1;r2=x2;s1=y1;s2=y2;
               pr1=0;
            end
          ims