Pixel-art scaling algorithms
lastmod 2026-11-10created 2025-01-072 edits
Pixel-art scaling algorithms are a family of algorithms that enlarge low-resolution pixel art by integer factors without blurring it. Because simple interpolation smears edges, they look at the surrounding pixel patterns to infer lines and curves while upscaling. EPX, Scale2x, hqx, and xBR are representative examples, and they are widely used as screen filters in emulators.