Removing small area from labeled image

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Syahrul Niezam 2012-1-30

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/27436-removing-small-area-from-labeled-image

I tried to execute this codes to remove small labeled area, but the result is not much change compared to original labeled image.

a=imread('image1_118.jpg');
subplot(2, 3, 1);
imshow(a);
b=im2bw(a, 0.45);
subplot(2, 3, 2);
imshow(b);
c=bwlabel(b, 8);
subplot(2, 3, 3);
imshow(c, []);
subplot(2, 3, 4);
[B,L] = bwboundaries(c);
imshow(L)
hold on
for k = 1:length(B)
    boundary = B{k};
    plot(boundary(:,2), boundary(:,1), 'y', 'LineWidth', 2)
end
stats=regionprops(c, 'area');
num=size(stats);
for k=1:num
    areas=stats(k).Area;
end
areas2=[stats.Area];
x=areas2<100;
y=find(x);
L=ismember(c, y);
d=bwlabel(L, 8);
subplot(2, 3, 5);
imshow(d, []);