I am working with tesseract OCR and I would like to get at the end of
the algorithm a confidence value which may express if the recognition
seems OK or not really.

For example, I have an image with the text: TEST RESULTS ARE OK.
Depending on a threshold value, I can get different output of the OCR:
 - TEST RESSUTTS AKE OC
 - TEST TELLUTTS ARE OB
....
The best threshold can be different for different images.
So if I can get this confidence value, maybe it can give me the best
theshold to choose for the OCR?

Thank you for your help,
Caroline

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