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How can I classify the image pixels into two classes only using Kmeans algorithm?
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I have gray-level image, I need to use Kmeans in MatLab to convert this image into binary image.
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Akira Agata
2017-10-23
I think the solution would be like this:
% Read gray-scale image
I = imread('cameraman.tif');
% Clustering by k-means
x = double(I(:));
[idx, center] = kmeans(x,2);
% Make binary image
[nrow,ncol] = size(I);
labels = reshape(idx,nrow,ncol);
BW = labels == 1;
% Show the result
imshowpair(I,BW,'montage')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/178799/image.png)
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Image Analyst
2018-10-24
When computing distances between points, you don't want the result to be integer because the precision won't be that accurate, and if the inputs were integers the output would be also.
I guess they want you to do the conversion before calling rather than the function doing it itself internally.
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