how to count the different dots seperately
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I have an image with red dots ,green dots and yellow dots. some dots are touching eachother. (2 pixels) and some dots are alone (1pixel) I would like to have a count of red dots, green dots, yellow dots and the number of touching dots. Can someone tell me how this can be achieved. I am attaching the image here.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/165080/image.png)
Thank You
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Answers (1)
Image Analyst
on 1 Jul 2014
Extract the color channels
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
Then threshold and label
redDots = redChannel > 100; % or whatever
[!, numberOfRedDots] = bwlabel(redDots);
greenDots = greenChannel > 100; % or whatever
[!, numberOfgreenDots] = bwlabel(greenDots);
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