AI 圖片放大 —— 提升解析度

Traditional image enlargers — the kind built into image editors or browsers — use bicubic or Lanczos interpolation. Those methods average neighboring pixels to fill in gaps, so a 2x or 4x enlargement looks smooth but soft. Edges blur, fine textures disappear, and text becomes mushy.

AI super-resolution is fundamentally different. The model is trained on millions of low-res / high-res image pairs, so it learns what real detail looks like at higher resolutions. When you upscale, it doesn't just stretch pixels — it predicts the high-resolution content that was lost in the original. That's why an AI-upscaled photo can look genuinely sharper than the source, while a bicubic upscale only ever looks bigger.

ImageAI's upscaler offers two modes. Fast mode is a lightweight super-resolution model that does a clean 2x upscale in under a second — ideal for batch jobs and when the source is already decent quality. Creative mode uses a heavier generative model that can hallucinate plausible detail for 4x upscales, which is what you want for AI-generated images, low-res phone snapshots and old scans where there genuinely is no detail to recover.