how to segment white matter, gray matter ,csf in an gray image using otsu thresholding method?

i'm doing my project in medical image processing.. i need to segment the tumor in a brain image. i don't know how to implement these in matlab..so i need the matlab code for this proces

[Image Analyst]

Slight variant of http://www.mathworks.com/matlabcentral/answers/85700-how-to-segment-white-matter-gray-matter-csf-in-an-gray-image-using-otsu-thresholding-method

Answer 1

[Image Analyst]

This is way too complicated to provide a solution here. Again go to VisionBib (like I referred you to in your other question) to learn, from published papers, how people do this. There have been hundreds of papers on this over the years (none of which could be explained in a short Answers forum post).