$${\color{orange}Cambridge\space IELTS \space PDF \space Analyzer}$$ 💫

This project is a FastAPI-based web application designed to analyze $${\color{lightgreen}Cambridge \space IELTS \space PDFs \space (Books 1-18)}$$ for the most and least repeated words. It can handle both regular text-based PDFs and scanned image-based PDFs by converting them to images and extracting text using OCR (Optical Character Recognition). Additionally, it performs spell-checking and word correction to ensure the accuracy of the extracted text.

$${\color{LightSKYBlue}Features}$$ 💡

• PDF Upload: Upload PDF files (IELTS books) via the web interface.

• OCR for Scanned PDFs: For PDFs that consist of scanned images instead of real text, the application converts the pages to images and extracts text using OCR (via libraries like pytesseract).

• Spell Checking and Correction: The application checks all extracted words to ensure they are valid English words. If a word is misspelled or doesn't exist, it automatically finds and replaces it with the nearest correct word (using libraries like textblob or spellchecker).

• File Management: List and manage uploaded PDF files.

• Word Analysis: Extract and analyze words from the uploaded PDFs, focusing on the most and least frequently occurring words.

• Metadata Storage: Store word counts, sentences, and the book reference in an SQLite database.

• Data Filtering: Remove common English stop words and non-alphabetic characters. Chinese characters are ignored during analysis.

• API Endpoints:

  • /upload-file/: Upload PDF files for analysis.
  • /files/: List all uploaded files.
  • /words/most-repeated/: Retrieve the most repeated words across the uploaded files.
  • /words/least-repeated/: Retrieve the least repeated words across the uploaded files.
  • /analyze/: Perform a fresh analysis of all uploaded files, extracting word metadata.

• Customizable Queries: Fetch the most and least repeated words with customizable limits via query parameters.

$${\color{LightSKYBlue}Tech \space Stack}$$ 💻

• Backend: FastAPI
• Database: SQLite (via SQLAlchemy ORM)
• PDF Processing: PyPDF2 and pdfplumber
• OCR: pytesseract for text extraction from images in scanned PDFs.
• Spell Checking and Correction: textblob or spellchecker for ensuring word accuracy and correcting misspellings.
• Tokenization and Text Processing: NLTK (Natural Language Toolkit)
• Frontend: Basic HTML/CSS rendering for data display
• Deployment: Uvicorn server

$${\color{LightSKYBlue}Installation}$$ 👻

1. Clone the repository:

   git clone git@github.com:fatemeh-mohseni-AI/most-repeated-vocabulary-IELTS.git
   cd most-repeated-vocabulary-IELTS 
   

2. Set up a virtual environment:

   python -m venv venv
   source venv/bin/activate   # On Windows: venv\Scripts\activate
   

3. Install dependencies:

   pip install -r src/requirements.txt
   

4. create books directory under src and add Cambridge pdf files to it.

5. Run the application:

   uvicorn src.main:app --reload

$${\color{LightSKYBlue}Future \space Improvements}$$ ⚡

1️⃣ Enhanced Text Extraction: Improve the accuracy of text extraction, especially for complex PDFs, by fine-tuning OCR settings and using more advanced text extraction libraries.

2️⃣ Frontend Redesign with React: Build a more user-friendly and interactive frontend using React to display and manage the analysis results.

3️⃣ Additional Queries: Implement more sophisticated queries, such as filtering results by book, word length, or frequency range.

4️⃣ Sentence Metadata: Store the sentences in which the most important words have been used, and provide endpoints to retrieve this information.

5️⃣ Word Lemmatization and Stemming: Incorporate advanced linguistic processing techniques like lemmatization and stemming to group different forms of the same word.

6️⃣ Advanced Spell Correction: Use machine learning models to enhance the spell-checking and correction system for better accuracy.

7️⃣ Multi-language Support: Expand the application to support other languages beyond English, including additional character sets and stop word lists.

8️⃣ Improved PDF Handling: Add support for handling password-protected PDFs and improving performance for large documents.

9️⃣ User Authentication: Add user authentication and role-based access control for managing file uploads and analysis data.

$${\color{LightSKYBlue}Demo}$$ 📱