title: How to use an image having imaginary values for further processing like binarization in MATLAB?
body: <p>I have a gray image on which I have applied homomorphic filtering. The result of this filtering gives me an image which has some complex numbers as it's pixel values. When I viewed imaginary image and real image separately, then I realized I need only imaginary image for further processing. But I am unable to use it as I am unable to binarize the imaginary image for further processing. 
  If anyone has any solution or suggestion regarding this then kindly let me know.</p>
  
  <p>Here is the whole process image:<a href="https://i.stack.imgur.com/Z3yC0.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Z3yC0.jpg" alt="enter image description here"></a></p>
  
  <p>complex image: <a href="https://i.stack.imgur.com/9VWtL.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9VWtL.jpg" alt="enter image description here"></a></p>
  
  <p>real image: <a href="https://i.stack.imgur.com/5jzbz.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5jzbz.jpg" alt="enter image description here"></a></p>
  
  <p>original gray image: <a href="https://i.stack.imgur.com/073R2.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/073R2.jpg" alt="enter image description here"></a></p>