QR Code Detector (CPU)

A lightweight Streamlit app that counts and decodes multiple QR codes from a single image using OpenCV's QRCodeDetector (CPU-friendly, no GPU required).

Why this model?

OpenCV's built-in QRCodeDetector is fast, runs on CPU, and supports detecting and decoding multiple QR codes in one pass. It avoids heavyweight deep learning models while still providing reliable results for typical QR images.

Features

• Upload an image with multiple QR codes.
• Count all detected QR codes.
• Decode and list the embedded data.
• Visualize bounding boxes and labels.

Setup

python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

Run

streamlit run app.py