matlab程序求解答

[Zjrhpz]

有大佬可以帮我解释一下下面的程序吗，谢谢大家了！
bw = im2bw(im,graythresh(im));
bw = ~bw;
[r, c] = find(bw);
rect = [min(c)-1 min(r)-1 max(c)-min(c)+2 max(r)-min(r)+2];
bwt = imcrop(bw, rect);
rate = 70/size(bwt, 1);
rc = round(size(bwt)*rate);
bwt = imresize(bwt, rc, 'bilinear');
if size(bwt, 2) < 50
bwz = zeros(70, 50);
ss = round((size(bwz, 2)-size(bwt,2))*0.5);
tt = round((size(bwz, 1)-size(bwt,1))*0.5);
bwz(:, ss:ss+size(bwt,2)-1) = bwt;
else
bwz = imresize(bwt, [70 50], 'bilinear');
end
bwz = logical(bwz);
for k=1:7
for k2=1:5
dt=sum(bwz(((k*10-9):(k*10)),((k2*10-9):(k2*10))));
f((k-1)*5+k2)=sum(dt);
end
end
f=((100-f)/100);
p = f(:);