EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Hacker News·Aug 8·5 min read
Dithered QR Codes
TL;DR
Dithered QR codes utilize a unique method of encoding data by modifying the data modules to create low-resolution images, enhancing their visual appeal. This technique employs Floyd-Steinberg dithering to improve image quality while maintaining QR code functionality.
✦ Why It Matters
Consider using dithered QR codes to enhance brand visibility while maintaining scannability.
Key Takeaways
- Experiment with dithered QR codes for unique branding.
- Use error diffusion to improve image quality in QR codes.
- Balance aesthetics and scannability for printed materials.
- Ensure adequate margins for reliable scanning.
How It Works
Dithered QR codes utilize a grid system where data modules are modified to include low-resolution images. The Floyd-Steinberg dithering technique thresholds pixel brightness and diffuses errors to neighboring pixels, enhancing overall image quality.
A two-pass error diffusion process first masks the data modules, ensuring they maintain their required colors while minimizing visible noise.