title: Is a library needed for Tesseract to detect PNG files?
body: <p>I'm running Tesseract 2.04 to read a PNG file but I'm getting this error:-</p>
  
  <pre><code>Tesseract Open Source OCR Engine
  name_to_image_type:Error:Unrecognized image type:png.png
  IMAGE::read_header:Error:Can't read this image type:png.png
  Tessedit:Error:Read of file failed:png.png
  Signal_exit 31 ABORT. LocCode: 3  AbortCode: 3
  </code></pre>
  
  <p>I've searched everywhere and tried several things, but can't find the root cause. Some pages hint at installing some Leptonica library, but nothing specific. It seems everyone's version of Tesseract can read PNG files by default. What could I be missing?</p>
  
  <p>Thanks!</p>