Separation of rust and intact-paint areas on coated surfaces
Rust, bare metal and intact paint on a coated coupon imply different maintenance reasons. One defect label does not separate their area fractions and distribution.
Store rust, bare-metal and paint masks separately in the inspection record; route high-rust-fraction surfaces for maintenance review. No remaining-life estimate is given.
- 01 Position
- 02 Raw image
- 03 Mask generation
- 04 Region calculation
- 05 Decision
Register the ROI; occluded areas are excluded from visible-area calculations.
- Target-mask area
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- Connected regions / objects
- —
- Decision metric
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Scenes are illustrative simulations; they are not customer references or performance guarantees.
Solution approach
Pixel or instance masks are derived from the raw image; a coded legend separates background and target regions. Area fractions use only the visible ROI. Separate three surface classes with coded colours; calculate rust-area fraction and connected-island count. The rust tone is distinct from the verdict signal.
Process steps
- 01
Position
Register the ROI; occluded areas are excluded from visible-area calculations.
- 02
Raw image
Keep the controlled raw image in a separate panel.
- 03
Mask generation
Coded colours show target classes or object identities.
- 04
Region calculation
Derive area fraction, connected regions and the decision metric from the mask.
- 05
Decision
Hold an out-of-limit sample for review with its local region marked.
Related applications
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