BULK PDF Color Inverter

This Python script automates the process of inverting colors in PDF documents giving a Dark Mode feeling. Works great for kindle like device that don't offer a dark mode. It also keeps your folder structure for convenience

Features

• Color Inversion: Efficiently inverts colors of PDF pages.
• Text and Image Detection: Differentiates between text-heavy and image-heavy pages for optimal processing.
• Multi-threaded Processing: Uses concurrent threads for faster processing of multiple PDF files.
• Automatic PDF Conversion: Converts processed pages back into PDF format without converting everything into images first, saving space.

Requirements

• Python 3.6+
• PyMuPDF (fitz) library
• Pillow (PIL) library
• PyPDF2 library

Installation

1. Clone the repository:

git clone https://github.com/Deadlydav/bulkpdfcolorinverter.git

3. Install the required libraries:

pip install PyMuPDF pillow PyPDF2

Usage

1. Modify the input_folder and output_folder variables at the end of the bulkpdfinverter.py to specify your input PDF directory and desired output directory.

    # Define input and output directories
    input_folder = '/path/to/your/input/folder'
    output_folder = '/path/to/your/output/folder'

3. Run the script:

python3 invert_pdf_colors.py

3. Inverted PDFs will be saved in the output folder structure.

Configuration

Adjust the following parameters in invert_pdf_colors.py as needed:

• dpi: DPI resolution for image conversion.
• contrast_factor: Adjusts contrast enhancement for image-heavy pages.

License

This project is licensed under the MIT License. See the LICENSE file for details.

Acknowledgements

• PyMuPDF
• Pillow
• PyPDF2

Contributing

Pull requests are welcome.