Read a confusion matrix like an operations map
Use a confusion matrix to identify which computer-vision errors deserve action first.
A three-class PPE classifier is missing some no-helmet cases, especially around dusk and orange hard hats. Read the confusion matrix by error cost, then inspect image examples from the cell that matters most. The common shortcut is to average scores across classes and miss the operationally dangerous cell. Name the high-cost cell Identify true "no helmet" images predicted as "helmet" or "unclear" as the first cell to inspect. For a safety workflow, missed violations are more costly than extra reviews. Open real examples Inspect 20 missed no-helmet images and tag visible patterns: dusk, orange hats, backlighting, occlusion, camera angle. The…
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