title: what does Tilde image mean in MATLAB?
body: <p>I am working on a code for image processing in Matlab and the thinning won't work unless I call the function on the original image with the tilde and then save it to the same variable (found it somewhere on the internet). </p>
  
  <pre><code> I= bwmorph(~I, 'thin', inf);
   I=~I;
  </code></pre>
  
  <p>My question is, what does the tilde do/mean here?</p>