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Pytesseract OCR Multi-Configuration Configuration
When utilizing Pytesseract for Optical Character Recognition (OCR), it is crucial to optimize its settings to enhance accuracy for specific scenarios. This article addresses a particular issue where the OCR has difficulty distinguishing between single-digit numbers and the letter 'O'.
Problem:
Pytesseract cannot differentiate between the number zero and the letter 'O' when configured with '-psm 7' for single-digit recognition.
Solution:
To address this challenge, Tesseract 4.0.0a provides two key configuration options:
Sample Code:
The following code demonstrates how to use these configuration options together:
import pytesseract from PIL import Image # Load the image im = Image.open('digits_image.png') # Multiple configuration options target = pytesseract.image_to_string(im, config='--psm 10 --oem 3 -c tessedit_char_whitelist=0123456789')
With this configuration, Pytesseract can accurately recognize single-digit numbers while excluding the possibility of mistaking them for 'O'.
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