This repository provides tools to convert PowerPoint presentations (.pptx) into images for each slide and then detect logos on those slides using Azure OpenAI. The project includes two main scripts:

Converts each .pptx file in a given input folder to PNG images for each slide. These images are saved in a specified output folder with filenames indicating the slide number. The conversion process involves:

• Converting .pptx files to PDF using LibreOffice.
• Converting the PDF into PNG images for each slide using pdftoppm.

1. Place your .pptx files in the input folder (e.g., data).

2. Run the script:

   python convert_pptx_to_png.py

3. The script will save PNG images for each slide in the output folder (e.g., slides).

The default directories for input and output are:

INPUT_FOLDER = 'data'      # Path to the input folder with .pptx files
OUTPUT_FOLDER = 'slides'   # Path to the output folder for PNG images

You can change INPUT_FOLDER and OUTPUT_FOLDER to customize where files are read and saved.

Processes each PNG image of a slide, sending it to an Azure OpenAI model that detects company logos. The script reads all PNG files in a specified folder, converts each image to base64, and sends it to the OpenAI API. Results are saved in an output file with the detected logos for each slide.

1. Ensure that the PNG images from convert_pptx_to_png.py are in the slides directory (e.g., slides).
2. Run the script:

   python detect_logos_gpt4o.py

3. The results will be saved in an output file (output/logos_output_gpt4o.txt).

The default directory for PNG files is:

SLIDES_DIR = 'slides'  # Path to the folder with PNG files for processing

You can change SLIDES_DIR if your images are saved in a different directory.

Before running detect_logos_gpt4o.py, create a .env file in the project root with the necessary Azure OpenAI API credentials. The file should contain:

• AZURE_OPENAI_API_KEY: Your API key for Azure OpenAI.
• AZURE_OPENAI_ENDPOINT: The endpoint URL for Azure OpenAI.
• AZURE_OPENAI_DEPLOYMENT_ID: The deployment ID of your model.

An example .env file:

AZURE_OPENAI_API_KEY=your_api_key
AZURE_OPENAI_ENDPOINT=https://your_endpoint.openai.azure.com
AZURE_OPENAI_DEPLOYMENT_ID=your_deployment_id

These values will be used by detect_logos_gpt4o.py to authenticate and interact with the Azure OpenAI API.

• Python (3.11 or later)
• LibreOffice: Required for converting .pptx to PDF on Linux.
• poppler-utils: Required for converting PDF to PNG.
• Java: Needed for LibreOffice if not already installed.

1. Install LibreOffice:

   sudo apt update
   sudo apt install -y libreoffice-core libreoffice-impress libreoffice-script-provider-python
   sudo apt upgrade -y libreoffice

2. Install Java (if needed):

   sudo apt install -y default-jre
   java -version
   sudo update-alternatives --config java
   echo "export JAVA_HOME=/usr/lib/jvm/java-21-openjdk-amd64" >> ~/.bashrc
   echo "export PATH=$PATH:$JAVA_HOME/bin" >> ~/.bashrc
   source ~/.bashrc

3. Install Poppler Utils:

   sudo apt-get update
   sudo apt-get install poppler-utils

4. Test Installation:

   soffice --headless --convert-to pdf ./data/sample_deck.pptx --outdir ./data/