Feyn releases MultiMatte: a SAM 3 fine-tune that removes backgrounds from objects you name in a phrase

Show HN: MultiMatte, a Promptable Image Background Removal Model

Feyn Labs fine-tuned Meta's SAM 3 into MultiMatte, a background removal model you prompt with a phrase like 'the dog'. It modifies only 2.27% of the parameters yet lifts S-measure on DIS-VD from 0.667 to 0.901. The key change is outputting alpha mattes instead of binary masks, so fuzzy edges like hair look natural. Weights and the NoBg library are open-source and pip-installable.

Why it matters: A SAM 3 fine-tune that turns text prompts into background removal, with S-measure jumping from 0.667 to 0.901 using only 2.27% of parameters. Solid technical efficiency. Score sits at the featured threshold because it's a useful tool, not an industry-level event, and lacks the...