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BlogsEverley Tseng3 Sep 20269 min read

We audited SAM3 generated annotations in sixty seconds with 3LC

We labeled CamVid with SAM3, trained a semantic segmentation model on it, and let 3LC audit the result. Three issues immediately surfaced: speckled masks, a heavily skewed class distribution, and a pedestrian/bicyclist confusion inherited from the prompt.

3LC
The 3LC team
Oslo & Boulder · 3 Sep 2026

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