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Bounding Box Annotation: The Complete Technical Guide for New ML Teams in 2026
April 16, 2026
If You Think Bounding Boxes Are Simple, You Are Behind Where It Actually Matters
Most people treat bounding box annotation like it’s the easy part of building a computer vision model. Just draw rectangles around objects, right? That’s what average builders think. And then they wonder why their object detection model has mediocre mAP scores, fails in production, and needs three rounds of retraining before it comes anywhere close to what they needed.