SPANDA SecureTrace Optical Analyzer v0.3
Prototype B — micro-dot constellation • marker-specific detection (experimental)
This version does not use the old whole-image fingerprint. It detects the QR, estimates a normalized QR coordinate system, then searches specifically for Prototype B micro-dot features and the registration triplet. Only one live camera surface is shown; the analysis canvas is hidden.
Ready.
Current scan
Prototype B — marker detection
No marker analysis yet.
Physical signature experiment
No baseline captured yet.
What v0.3 actually checks
| Feature | Detector |
|---|---|
| QR geometry | Three finder-pattern points → estimated QR square. |
| Micro-dot constellation | Searches four outer bands where B dots are expected. |
| Dot position | Detected blob centers are converted to QR-normalized coordinates. |
| Intentional asymmetry | Checks the right-side missing-dot region. |
| Registration triplet | Separately checks the small 3-dot feature above/left of the QR. |
| Copy comparison | One-to-one matching of marker features, not generic QR-image correlation. |
Experimental only. Geometry is tuned to the Prototype B test sheet generated for this experiment. It is not a production counterfeit classifier.