Image Segmentation Using K means

When I execute the following command in Matlab 2012a
centroid=kmeans(imread('image.jpg'),4);
I get the following error
Error using +
Integers can only be combined with integers of the same class, or scalar doubles.
Error in kmeans>distfun (line 659)
*D(:,i) = D(:,i) + (X(:,j) - C(i,j)).^2;*
*Error in kmeans (line 273)*
*D = distfun(X, C, distance, 0, rep, reps);*
I need to segment this image into 4 cluster. This image is a CT Brain tumour Image. Size of this image is 233 x 216. Please give me a solution to cluster this image file.

回答(3 个)

YourImage = imread('Image.jpg');
centroid = kmeans(double(YourImage), 4);
Note: if your .jpg is color rather than greyscale, you will probably need to convert it to greyscale before clustering.

5 个评论

I got it. Your reason is correct.
Instead of using kmeans for segmenting, I used the default kmeans in MATLAB. So this error occurred. Now my program is working by using the kmeans segmentation algorithm.
Thanks for commenting on my doubt.
Do you want to cluster based on intensity of pixels (e.g. you want 4 gray level classes), or you want to find spatial clusters (e.g. 4 clumps of spatially separated pixels)?
I want kmeans to cluster based on the intensity of pixels, so I used the kmeans Segmentation algorithm and got the output.
Thank you for your comment
sir i need to cluster the image based on intensity of pixels e.g. i want 3 gray level classes
convert the image to grayscale and kmeans requesting 3 clusters .

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moahaimen talib
moahaimen talib 2017-4-10

0 个投票

hi i need to use kmean for segmenting and clustering a binary image please help

提问:

2013-6-29

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