1 Introduction
2 System and database
2.1 The 3K-camera
2.2 The onboard system
2.3 Direct georeferencing
2.4 Test site and 3K imagery
2.5 Road database
3 Processing chain
3.1 Road extraction
3.2 Vehicle detection
3.3 Vehicle tracking
4 Results
4.1 Road detection
4.2 Vehicle detection
Site | Correct | False | Missed | Correctness (%) | Completeness (%) |
---|---|---|---|---|---|
Motorway (1,000 m) | 85 | 22 | 41 | 79 | 68 |
Motorway (1,500 m) | 67 | 32 | 19 | 68 | 78 |
Motorway (2,000 m) | 95 | 30 | 76 | 76 | 56 |
City (1,000 m) | 47 | 16 | 25 | 75 | 65 |
4.3 Vehicle tracking
4.4 Performance
5 Night shot capability
Strip | Δt (s) | Apert. | Vehicle headlights R/G/B | Vehicle taillight | Max. blurringa (m) |
---|---|---|---|---|---|
A-1 | 1/1,024 | F1.8 | ∅ 50/–/– Max R = 109 | <5 | 0.06 + 0.04 |
A-2 | 1/512 | F1.8 | ∅ 102/80/61 Max R = 192 | Max R = 48 | 0.13 + 0.08 |
B-1 | 1/512 | F1.8 | ∅ 59/46/35 Max R = 67 | <5 | 0.13 + 0.08 |
B-2 | 1/800 | F1.4 | ∅ 82/–/– Max R = 182 | <5 | 0.08 + 0.05 |
B-3 | 1/800 | F1.8 | ∅ 46/–/– Max R = 82 | <5 | 0.08 + 0.05 |