title: Azure Computer Vision API - OCR to Text on PDF files
body: <p>I'm attempting to leverage the Computer Vision API to OCR a PDF file that is a scanned document but is treated as an image PDF. </p>
  
  <p>I've tested it and it tells me that the PDF is "InvalidImageFormat", "Input data is not a valid image". When I test it on a PNG, it works perfectly. </p>
  
  <p>Is there anyway to use the API against a PDF image or is there an Azure API that I could use in conjunction to go PDF > PNG > Text? </p>