Extracting Particular Object from image

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Hi everybody i have applied k-mean clustering on this image
i got 3 cluster but this was of my interest as shown in below picture but problem is this that i only want to extract infected cell shown in the below picture in square box i don't want rest of the things kindly help me how to achieve this.Thanks in Advance.

Accepted Answer

Image Analyst
Image Analyst on 29 Nov 2014
That might not be a good method if it's not automatically choosing the correct clusters. I'd recommend you try color segmentation by HSV color space. See http://www.mathworks.com/matlabcentral/fileexchange/28512-simple-color-detection-by-hue - it will let you fine tune the thresholds to get exactly the color purple you want and not all those other colors. Try that and attach your code if you can't get it working.
  6 Comments
Image Analyst
Image Analyst on 29 Nov 2014
Try the attached. I did the adaptations I suggested. I'm thresholding pretty much on only the saturation image now. I also knocked down the smallest allowable blob to 220 pixels so that in image #5 it would still find something.

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More Answers (1)

r r
r r on 8 Aug 2018
I have an image I want to extract the small areas of black color within the blue How so؟؟؟
  1 Comment
Image Analyst
Image Analyst on 8 Aug 2018
Start your own new, separate question and I'll tell you how you can invert the image and use imclearborder() to do it.

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