How to count each colour pixel of an image?

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muhaimin mahfudz
muhaimin mahfudz il 30 Set 2018
Commentato: Image Analyst il 2 Ott 2018
I am trying to quantify the value of of each matter of the brain using matlab. I have segmented the image and result as shown below.
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Akira Agata
Akira Agata il 30 Set 2018
Modificato: Akira Agata il 30 Set 2018

Is it a result of k-means clustering? If so, you can count each color pixel easily by using the output variable of kmeans function.

muhaimin mahfudz
muhaimin mahfudz il 1 Ott 2018
Modificato: muhaimin mahfudz il 1 Ott 2018
yes it is. I see, in conclusion i can just obtain the values from there as it is the value of each segmented color?

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Image Analyst
Image Analyst il 30 Set 2018

Take the histogram of your segmented/classified image

counts = imhist(classifiedImage);

Each class will have a certain value, like gray matter is 1, background is 0, white material is 2, etc. imhist() simply counts the pixels in each class.

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Image Analyst
Image Analyst il 1 Ott 2018
imhist() will do it. You pass in the classified image, not an RGB image, but the image you got from kmeans. See attached demo.
Image Analyst
Image Analyst il 2 Ott 2018
Do you still not understand? If so, give me the script you used to create that image along with the original image.

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