Unusual-shape anomaly maps on tyre-tread patches
An unusual tyre-groove shape may be absent from existing defect labels. Separating local differences from normal tread patches is more informative than one class for the entire tyre.
Link tread-patch location and its anomaly map to the review record and hold the tyre. Visual novelty is not presented as a road-safety or lifetime prediction.
- 01 Normal reference
- 02 New image
- 03 Local comparison
- 04 Score threshold
- 05 Send for review
Select the illustrative reference gallery of normal examples only.
- Local anomaly score
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- Above-threshold area
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- Illustrative score threshold
- —
Scenes are illustrative simulations; they are not customer references or performance guarantees.
Solution approach
Local features of normal examples are compared with the new ROI. Raw evidence, normal reference and a continuous anomaly map appear separately; the score threshold is not a defect class. Rotate the tyre on rollers and register tread ROI scale to the normal reference. A new groove patch creates above-threshold area in the local heatmap.
Process steps
- 01
Normal reference
Select the illustrative reference gallery of normal examples only.
- 02
New image
Image the new sample under the same lighting and registration conditions.
- 03
Local comparison
Show local feature deviation as a continuous heatmap.
- 04
Score threshold
Show the local score and above-threshold area as separate criteria.
- 05
Send for review
Hold an anomalous example for the operator without inventing a defect type.
Related applications
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