bwlabel does not count objects in the image

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Nadia Luna 2022-4-19

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https://ww2.mathworks.cn/matlabcentral/answers/1700290-bwlabel-does-not-count-objects-in-the-image

评论： Image Analyst 2022-4-19

I wrote a code to count lymphocites but numObjects always says zero

IL = imread('Lymphocytes.jpg');
imshow(IL, [])
imhist(IL)
Thresh = multithresh(IL,2);
seg_I2 = imquantize(IL,Thresh);
imshow(seg_I2, [])
for i=1:size(seg_I2,1)
    for j=1:size(seg_I2,2)
        if seg_I2(i,j)==1
            seg_I2(i,j)=3;
        end
    end
end
imshow(seg_I2,[])
J = imcomplement(seg_I2);
imshow(J,[])
binaryImage = J > 128;
[labeled,numObjects]=bwlabel(binaryImage,8);

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Image Analyst 2022-4-19

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You're not showing us seg_I2 or J or binaryImage. Not only that, but you forgot to attach 'Lymphocytes.jpg' so we can't do anything but assume it's doing what you told it to do. Chances are binaryImage is all false. Check

maxValue = max(binaryImage)

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