How to Configure Pytesseract for Single-Digit Number Recognition Only?

Pytesseract OCR: Configuring for Single-Digit and Number-Only Recognition

Pytesseract, an open-source OCR library, provides flexibility in configuring its engine for specific requirements. In this context, we aim to configure Tesseract to recognize single digits while restricting it to numbers, as the digit '0' can often be misinterpreted as the letter 'O'.

Problem Definition

The user encounters difficulties when configuring Pytesseract for this purpose using the following syntax:

target = pytesseract.image_to_string(im,config='-psm 7',config='outputbase digits')

Configuration Parameters

As outlined in tesseract-4.0.0a, Tesseract supports various page segmentation modes, each with specific characteristics. To enable single-character recognition, we set psm to 10. Additionally, to restrict recognition to numerals, we set tessedit_char_whitelist to include only the desired range of digits (0-9).

target = pytesseract.image_to_string(image, lang='eng', boxes=False, \
        config='--psm 10 --oem 3 -c tessedit_char_whitelist=0123456789')

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