title: Asynchronous reading text from image with Tesseract?
body: <p>is it possible to get text from images with tesseract asynchronously? 
  id love to give users to cancel the scanning if it takes much time.</p>
  
  <pre><code>char* utf8Text = tesseract-&gt;GetUTF8Text();
  </code></pre>
  
  <p>locks the screen until OCR finishes.</p>