title: How do I enlarge a picture so that it is 300 DPI?
body: <p>The accepted answer to the question <a href="https://stackoverflow.com/questions/462860/c-library-for-image-recognition-images-containing-words-to-string">C++ Library for image recognition: images containing words to string</a> recommended that you:</p>
  
  <ol>
  <li>Upsize/Downsize your input image to 300 DPI.</li>
  </ol>
  
  <p>How would I do this... I was under the impression that DPI was for monitors, not image formats.</p>