Browser Image Upscaling: How We Got 4 Super-Resolution 14 Faster — Then Made It Slower on Purpose

Automated excerpt

So before touching a line of code we built the bench: 15 cases, five content types (people, structure, texture, sharp edges, flat gradients) crossed with three degradations (clean source, JPEG q70, JPEG q40), each scored for PSNR, SSIM, and a high-frequency ratio against the ground truth. On flat gradients the hallucination metric climbed monotonically with source degradation — 3. 47 on clean, 4. 70 on JPEG q70, 5. 55 on JPEG q40.

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