Tesseract does not recognize single characters

ocr tesseract
artem picture artem · Mar 9, 2012 · Viewed 23.3k times · Source

How to represent:

  1. Create new image with paint (any size)
  2. Add letter A to this image
  3. Try to recognize -> tesseract will not find any letters
  4. Copy-paste this letter 5-6 times to this image
  5. Try to recognize -> tesseract will find all the letters

Why?

Answer

Marco Bonifazi picture Marco Bonifazi · Dec 3, 2013

You must set the "page segmentation mode" to "single char".

For example, in Android you do the following:

api.setPageSegMode(TessBaseAPI.pageSegMode.PSM_SINGLE_CHAR);

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