🪄 AI Background Remover — HD Pro (remove.bg-class)

Powered by BiRefNet (ZhengPeng7 · CAAI AIR'24) with hair-level alpha matting: auto model select (FULL Swin-L on big servers, distilled lite here) @768–1024px, trimap color-matting refinement for curls, halos & backlit hair. ~12s on CPU, ~1s on GPU. Runs on your server — photos never leave your machine. The original in-browser remover works without any server.

API: POST /api/remove-background?mode=hd|fast · env: BIREFNET_MODEL=full|lite, BIREFNET_SIZE=640–1024.