edge detection through parallel Ant colony optimization

i need to find the contour of the tumors that are shown in the form of white balls in the image please help me as i am new user of MATLAB.

[Walter Roberson]

To confirm, you need to extract the white balls using ACO? The white balls aren't just for illustration purposes on a different image?

Answer 1

[Image Analyst]

There are ACO algorithms in the File Exchange. But for your image you could find them simply by thresholding:

whiteBalls = mriImage >= 255;

[Image Analyst]

I know that. Please read my answer, particularly the first sentence.