Thai Text Extraction using OpenCV and Pytesseract

This project demonstrates how to extract Thai text from an image using OpenCV for image processing and Pytesseract for Optical Character Recognition (OCR).

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🧩 Prerequisites

Install the required dependencies using pip:

pip install opencv-python
pip install pytesseract

Also, install Tesseract OCR from Tesseract's official GitHub and note its installation path.

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⚙️ Configuration

Set up the Tesseract executable path according to your system:

pytesseract.pytesseract.tesseract_cmd = "C:/Program Files/Tesseract-OCR/tesseract.exe"

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🧠 Code Example

import cv2
import pytesseract

# Path to Tesseract executable
pytesseract.pytesseract.tesseract_cmd = "C:/Program Files/Tesseract-OCR/tesseract.exe"

# Load image
image_filename = "i1.jpg"
image = cv2.imread(image_filename)

# Convert to grayscale
gray_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

# Extract text (Thai language)
text = pytesseract.image_to_string(gray_image, lang='tha')
print(text)

# Display image
cv2.imshow("image", image)
cv2.waitKey(0)
cv2.destroyAllWindows()

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📤 Output

• The extracted Thai text will be printed in the terminal.
• The processed image will appear in a new window.

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🧾 Notes

• Make sure the Thai language pack is installed in your Tesseract setup.

• You can check installed languages using:

  tesseract --list-langs

  If tha is missing, install it via Tesseract language data files.

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🧰 Example Use Case

This setup can be used for:

• Extracting Thai text from scanned documents.
• Preprocessing text with OpenCV filters before OCR.
• Automating Thai document digitization workflows.

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Author: Saksham Upreti