how to use otsu's method image segmentation?

hye everyone, i'm learning about otsu's method. can someone please tell me about the step and example of the algorithm in matlab. i'm new user of matlab and i don't know much. please help me.

Answer 1

[Guillaume]

Isn't the example and explanation in the documentation of the function ( graythresh) enough?

I = imread('coins.png');
level = graythresh(I);
BW = im2bw(I,level);
imshow(BW)