title: Bluring an image in C++/C
body: <p>So I'm staring a project about image processing with C++.</p>
  
  <p>The thing is that everything I find online about this matter (blurring an image in C++) comes either with CUDA or with OpenCV.</p>
  
  <p>Is there a way to blur an image with C++ only? (for starters)</p>
  
  <p>If yes, can somebody please share the code or explain?</p>
  
  <p>Thanks!</p>