[FIXED] Unable to read text from Image using pytesseract.image_to_string

Issue

The problem here is I need to remove the lines and write code to recognize the characters. Till now I have seen solutions, where the char was in solid, but this has char with double border.

Solution

For this specific captcha, there's quite a simple solution. But, there's no guarantee for this approach to work on other, even very similar captchas – due to the "nature" of captchas as already mentioned in the comments, and in general when dealing with image-processing tasks with limited provided input data.

• Read the image as grayscale.

• Threshold the image at nearly white cutoff.

  

• Flood fill the "background" with black.

  

• Run pytesseract with -psm 6 option.

That'd be the whole code:

import cv2
import pytesseract

# Read image as grayscale
img = cv2.imread('FuZEJ.png', cv2.IMREAD_GRAYSCALE)

# Threshold at nearly white cutoff
thr = cv2.threshold(img, 224, 255, cv2.THRESH_BINARY)[1]

# Floodfill "background" with black
ff = cv2.floodFill(thr, None, (0, 0), 0)[1]

# OCR using pytesseract
text = pytesseract.image_to_string(ff, config='--psm 6').replace('\n', '').replace('\f', '')
print(text)
# xwphs

Caveat: I use a special version of Tesseract from the Mannheim University Library.

----------------------------------------
System information
----------------------------------------
Platform:      Windows-10-10.0.16299-SP0
Python:        3.9.1
PyCharm:       2021.1.1
OpenCV:        4.5.1
pytesseract:   5.0.0-alpha.20201127
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Answered By - HansHirse