title: Is image pre-processing required (Google Mobile Vision Text Recognition API)?
body: <p>In short: Is it needed or not to improve accuracy?</p>
  
  <p>A bit longer: I was going through documentation and Internet and I did not find any references concerning Mobile Vision and if it is doing some sort of image pre-processing procedures by itself or not. I am talking about e.g. deskewing, binarisation or etc. </p>
  
  <p>I know that e.g. you might improve tesseract-ocr accuracy by pre-processing images.</p>