How to fix graythresh error?

Hello,

I have a simple problem with matlab.

when I run below code , it return error.

whats the problem?

I=imread('coins.png');

level=graythresh(I);

how can I fix it?

Answer 1

[Image Analyst]

The code you gave runs fine:

I=imread('coins.png');
level=graythresh(I)

level = 0.4941