title: Can `tesseract-ocr` put the result to STDOUT?
body: <p>Using <code>tesseract-ocr</code> #3.02.02.</p>
  
  <p>The basic usage of tesseract is</p>
  
  <pre><code>tesseract sourc.png result
  </code></pre>
  
  <p>and <code>result.txt</code> is generated. To get the result text, I have to cat this file.</p>
  
  <p>Is there any options to dump the result in stdout?</p>