How I Built a Perceptual Color Quantization Engine for LEGO Mosaics

Short summary

A developer solved LEGO mosaic conversion by replacing RGB with OKLab (perceptually uniform color space) and adding material-aware distance metrics and spatial stabilization. The approach models brick properties (matte, transparent, metallic) and despeckles isolated pixels to significantly improve visual accuracy. The tool is live at bmbrick.com with a free parts list during launch.

• •OKLab color space preserves perceptual accuracy better than RGB matching
• •Material-aware distance accounts for how brick finishes affect color appearance
• •Spatial stabilization and despeckle pass eliminate visual noise and isolated pixels

Generated with AI, which can make mistakes.