[SESSION_127] PersonVehicleCorrelator: Implement Motion-Based Association (Phase 23)

Feature: Motion-Based Person-Vehicle Association

Component: PersonVehicleCorrelator (/nodes/behavior_nodes/person_vehicle_correlator/)
Severity: 🔴 CRITICAL BLOCKER
Session: SESSION 127 (Definition of Done)
Current Status: Uses only spatial distance, no velocity analysis
Target Phase: Phase 23

Context

Distance-only association misses important behavioral context. A person approaching a vehicle has different significance than one passing by. Motion analysis distinguishes approach/entry from casual proximity.

Requirements

• Track velocity vectors for persons and vehicles
• Detect approach vectors (moving toward vehicle)
• Distinguish entry/exit from passing by
• Calculate approach angle and speed
• Integrate motion into confidence scoring

Impact

Without this feature:

• High false positives (30-40% incorrect associations)
• Cannot distinguish entry from proximity
• Reduced blacklist/investigation accuracy
• Unreliable person-vehicle tracking

Effort Estimate

• Velocity calculation: 1.5 hours
• Motion analysis logic: 2-3 hours
• Testing: 1-1.5 hours
• Total: 4-5 hours

Technical Approach

• 2D velocity estimation (frame-to-frame)
• Dot product for approach detection
• Distance rate-of-change analysis
• Confidence weighting by motion signals

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Generated by SESSION 127 FASE 2.7