How can I segment the white area that i have circleed? How can I remove the others?

Hi, I have threshold the image which my threshold value is 100. I make adaptive histogram to make the image more clearer. Then from the adaptive histogram image, I compared the image with the threshold value. If the image more than threshold value, then it should remain.

but then, I just want the part that I have highlighted with the blue colour, and I want to remove the others. How can I remove the others? help me please.

Answer 1

[Image Analyst]

It looks like perhaps you used imfreehand() to trace an outline around one of the blobs. imfreehand() returns a binary image mask. Just use that mask to erase the other blobs from the original binary image

binaryImage(~mask) = false;

[fatin rasyidah]

where should i put that code ?