title: How to solve libpng function already defined error?
body: <p>I use ITK-4.11 and OpenCV-3.2 together in one of my c++ project, when I compile the project, I get an error that says:</p>
  
  <blockquote>
    <p>Error  1   error LNK2005: png_get_uint_31 already defined in itkpng-4.11.lib(pngrutil.obj)"</p>
  </blockquote>
  
  <p>Both of my ITK and OpenCV are built using Multi-threaded DLL (/MD), then, what should I do to avoid this error?</p>